DNS-RESOLVER-MIB

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Organization: IETF DNS Working Group

Last Updated: 1994-01-28

Category: Web and Application Servers

Description:

Defines managed objects for DNS resolver software, enabling SNMP-based management of DNS resolver configuration, cache, and query statistics.

Imported Objects

From DNS-SERVER-MIB

DnsClass
DnsName
DnsNameAsIndex
DnsOpCode
DnsQClass
DnsQType
DnsRespCode
DnsTime
DnsType
dns	OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString
RowStatus
TEXTUAL-CONVENTION

What Is DNS-RESOLVER-MIB?

DNS-RESOLVER-MIB is a vendor-neutral IETF standards-track MIB for managing the client-side DNS resolver software on a host or networking device. It exposes resolver configuration such as the search belt (default name servers), implementation identity, recursion behavior, and query statistics/counters. It is used to monitor DNS resolver software status and configuration — confirming which name servers are configured, resolver service state, and query counters that catch resolution failures or misconfiguration. The DNS-RESOLVER-MIB RFC (RFC 1612) defines this module's objects independent of any vendor implementation, so it can be loaded on any compliant host or device. It has little role in hardware monitoring since it covers software (DNS resolver) status, and it stands alone as a standards MIB without dependency on specific enterprise MIBs. It is typically deployed on servers, routers, or any networked device performing DNS name resolution, for troubleshooting name-resolution problems.

IPNetwork Monitor allows you to monitor SNMP objects defined in DNS-RESOLVER-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

What Can Be Monitored

configured DNS server addresses (search belt)
server preference order
recursion support per server
max CNAMEs followed
resolver query counters
resolver implementation identity

Supported Devices

vendor-neutral, standards-based MIB, not tied to a specific manufacturer — applies to any host or network device running DNS resolver software

Monitoring Examples

An admin can poll dnsResConfigSbeltTable/dnsResConfigSbeltEntry to verify configured name servers (dnsResConfigSbeltAddr, dnsResConfigSbeltName) and their preference order (dnsResConfigSbeltPref), useful when diagnosing lookup failures after a DNS server change. dnsResConfigMaxCnames bounds CNAME chain following, and dnsResCounter tracks resolver query volume, revealing spikes in failed lookups when a configured server becomes unreachable.

OIDs

OID symbolic	OID numeric	Type	Access	Description
dnsResCache	1.3.6.1.2.1.32.2.1.4
C32 dnsResCacheBadCaches	1.3.6.1.2.1.32.2.1.4.4	Counter32	read-only	Number of RRs the resolver has refused to cache because they appear to be dangerous or irrelevant. E.g., RRs with suspiciously high TTLs, unsolicited root information, or that just don't appear to be relevant to the question the resolver asked.
C32 dnsResCacheGoodCaches	1.3.6.1.2.1.32.2.1.4.3	Counter32	read-only	Number of RRs the resolver has cached successfully.
dnsResCacheGroup	1.3.6.1.2.1.32.2.2.4			A collection of objects providing access to and control of a DNS resolver's cache.
DNS dnsResCacheMaxTTL	1.3.6.1.2.1.32.2.1.4.2	DnsTime	read-write	Maximum Time-To-Live for RRs in this cache. If the resolver does not implement a TTL ceiling, the value of this field should be zero.
DNS dnsResCacheRRClass	1.3.6.1.2.1.32.2.1.4.5.1.2	DnsClass	not-accessible	DNS class of the Resource Record in the cache which is identified in this row of the table.
OCT dnsResCacheRRData	1.3.6.1.2.1.32.2.1.4.5.1.7	OCTET STRING	read-only	RDATA portion of a cached RR. The value is in the format defined for the particular DNS class and type of the resource record.
DNS dnsResCacheRRElapsedTTL	1.3.6.1.2.1.32.2.1.4.5.1.5	DnsTime	read-only	Elapsed seconds since RR was received.
dnsResCacheRREntry	1.3.6.1.2.1.32.2.1.4.5.1		not-accessible	An entry in the resolvers's cache. Rows may be created only by the resolver. SNMP SET requests may be used to delete rows.
I32 dnsResCacheRRIndex	1.3.6.1.2.1.32.2.1.4.5.1.9	Integer32	not-accessible	A value which makes entries in the table unique when the other index values (dnsResCacheRRName, dnsResCacheRRClass, and dnsResCacheRRType) do not provide a unique index.
DNS dnsResCacheRRName	1.3.6.1.2.1.32.2.1.4.5.1.1	DnsNameAsIndex	not-accessible	Owner name of the Resource Record in the cache which is identified in this row of the table. As described in RFC-1034, the owner of the record is the domain name were the RR is found.
DNS dnsResCacheRRPrettyName	1.3.6.1.2.1.32.2.1.4.5.1.10	DnsName	read-only	Name of the RR at this row in the table. This is identical to the dnsResCacheRRName variable, except that character case is preserved in this variable, per DNS conventions.
IP dnsResCacheRRSource	1.3.6.1.2.1.32.2.1.4.5.1.6	IpAddress	read-only	Host from which RR was received, 0.0.0.0 if unknown.
ROW dnsResCacheRRStatus	1.3.6.1.2.1.32.2.1.4.5.1.8	RowStatus	read-write	Status column for the resolver cache table. Since only the agent (DNS resolver) creates rows in this table, the only values that a manager may write to this variable are active(1) and destroy(6).
dnsResCacheRRTable	1.3.6.1.2.1.32.2.1.4.5		not-accessible	This table contains information about all the resource records currently in the resolver's cache.
DNS dnsResCacheRRTTL	1.3.6.1.2.1.32.2.1.4.5.1.4	DnsTime	read-only	Time-To-Live of RR in DNS cache. This is the initial TTL value which was received with the RR when it was originally received.
DNS dnsResCacheRRType	1.3.6.1.2.1.32.2.1.4.5.1.3	DnsType	not-accessible	DNS type of the Resource Record in the cache which is identified in this row of the table.
INT dnsResCacheStatus	1.3.6.1.2.1.32.2.1.4.1	INTEGER	read-write	Status/action for the resolver's cache. enabled(1) means that the use of the cache is allowed. Query operations can return this state. disabled(2) means that the cache is not being used. Query operations can return this state. Setting this variable to clear(3) deletes the entire contents of the resolver's cache, but does not otherwise change the resolver's state. The status will retain its previous value from before the clear operation (i.e., enabled(1) or disabled(2)). The value of clear(3) can NOT be returned by a query operation.
dnsResConfig	1.3.6.1.2.1.32.2.1.1
dnsResConfigGroup	1.3.6.1.2.1.32.2.2.1			A collection of objects providing basic configuration information for a DNS resolver implementation.
STR dnsResConfigImplementIdent	1.3.6.1.2.1.32.2.1.1.1	DisplayString	read-only	The implementation identification string for the resolver software in use on the system, for example; `RES-2.1'
INT dnsResConfigMaxCnames	1.3.6.1.2.1.32.2.1.1.3	INTEGER	read-write	Limit on how many CNAMEs the resolver should allow before deciding that there's a CNAME loop. Zero means that resolver has no explicit CNAME limit.
INT dnsResConfigReset	1.3.6.1.2.1.32.2.1.1.7	INTEGER	read-write	Status/action object to reinitialize any persistant resolver state. When set to reset(2), any persistant resolver state (such as a process) is reinitialized as if the resolver had just been started. This value will never be returned by a read operation. When read, one of the following values will be returned: other(1) - resolver in some unknown state; initializing(3) - resolver (re)initializing; running(4) - resolver currently running.
DNS dnsResConfigResetTime	1.3.6.1.2.1.32.2.1.1.6	DnsTime	read-only	If the resolver has a persistent state (e.g., a process) and supports a `reset' operation (e.g., can be told to re-read configuration files), this value will be the time elapsed since the last time the resolver was `reset.' For software that does not have persistence or does not support a `reset' operation, this value will be zero.
IP dnsResConfigSbeltAddr	1.3.6.1.2.1.32.2.1.1.4.1.1	IpAddress	not-accessible	The IP address of the Sbelt name server identified by this row of the table.
DNS dnsResConfigSbeltClass	1.3.6.1.2.1.32.2.1.1.4.1.6	DnsClass	not-accessible	The class of DNS queries that will be sent to the server identified by this row of the table.
dnsResConfigSbeltEntry	1.3.6.1.2.1.32.2.1.1.4.1		not-accessible	An entry in the resolver's Sbelt table. Rows may be created or deleted at any time by the DNS resolver and by SNMP SET requests. Whether the values changed via SNMP are saved in stable storage across `reset' operations is implementation-specific.
DNS dnsResConfigSbeltName	1.3.6.1.2.1.32.2.1.1.4.1.2	DnsName	read-create	The DNS name of a Sbelt nameserver identified by this row of the table. A zero-length string indicates that the name is not known by the resolver.
INT dnsResConfigSbeltPref	1.3.6.1.2.1.32.2.1.1.4.1.4	INTEGER	read-create	This value identifies the preference for the name server identified in this row of the table. The lower the value, the more desirable the resolver considers this server.
INT dnsResConfigSbeltRecursion	1.3.6.1.2.1.32.2.1.1.4.1.3	INTEGER	read-create	Kind of queries resolver will be sending to the name server identified in this row of the table: iterative(1) indicates that resolver will be directing iterative queries to this name server (RD bit turned off). recursive(2) indicates that resolver will be directing recursive queries to this name server (RD bit turned on). recursiveAndIterative(3) indicates that the resolver will be directing both recursive and iterative queries to the server identified in this row of the table.
ROW dnsResConfigSbeltStatus	1.3.6.1.2.1.32.2.1.1.4.1.7	RowStatus	read-create	Row status column for this row of the Sbelt table.
DNS dnsResConfigSbeltSubTree	1.3.6.1.2.1.32.2.1.1.4.1.5	DnsNameAsIndex	not-accessible	Queries sent to the name server identified by this row of the table are limited to those for names in the name subtree identified by this variable. If no such limitation applies, the value of this variable is the name of the root domain (a DNS name consisting of a single zero octet).
dnsResConfigSbeltTable	1.3.6.1.2.1.32.2.1.1.4		not-accessible	Table of safety belt information used by the resolver when it hasn't got any better idea of where to send a query, such as when the resolver is booting or is a stub resolver.
INT dnsResConfigService	1.3.6.1.2.1.32.2.1.1.2	INTEGER	read-only	Kind of DNS resolution service provided: recursiveOnly(1) indicates a stub resolver. iterativeOnly(2) indicates a normal full service resolver. recursiveAndIterative(3) indicates a full-service resolver which performs a mix of recursive and iterative queries.
DNS dnsResConfigUpTime	1.3.6.1.2.1.32.2.1.1.5	DnsTime	read-only	If the resolver has a persistent state (e.g., a process), this value will be the time elapsed since it started. For software without persistant state, this value will be 0.
dnsResCounter	1.3.6.1.2.1.32.2.1.2
DNS dnsResCounterByOpcodeCode	1.3.6.1.2.1.32.2.1.2.3.1.1	DnsOpCode	not-accessible	The index to this table. The OpCodes that have already been defined are found in RFC-1035.
dnsResCounterByOpcodeEntry	1.3.6.1.2.1.32.2.1.2.3.1		not-accessible	Entry in the resolver counter table. Entries are indexed by DNS OpCode.
C32 dnsResCounterByOpcodeQueries	1.3.6.1.2.1.32.2.1.2.3.1.2	Counter32	read-only	Total number of queries that have sent out by the resolver since initialization for the OpCode which is the index to this row of the table.
C32 dnsResCounterByOpcodeResponses	1.3.6.1.2.1.32.2.1.2.3.1.3	Counter32	read-only	Total number of responses that have been received by the resolver since initialization for the OpCode which is the index to this row of the table.
dnsResCounterByOpcodeTable	1.3.6.1.2.1.32.2.1.2.3		not-accessible	Table of the current count of resolver queries and answers.
DNS dnsResCounterByRcodeCode	1.3.6.1.2.1.32.2.1.2.4.1.1	DnsRespCode	not-accessible	The index to this table. The Response Codes that have already been defined are found in RFC-1035.
dnsResCounterByRcodeEntry	1.3.6.1.2.1.32.2.1.2.4.1		not-accessible	Entry in the resolver response table. Entries are indexed by DNS response code.
C32 dnsResCounterByRcodeResponses	1.3.6.1.2.1.32.2.1.2.4.1.2	Counter32	read-only	Number of responses the resolver has received for the response code value which identifies this row of the table.
dnsResCounterByRcodeTable	1.3.6.1.2.1.32.2.1.2.4		not-accessible	Table of the current count of responses to resolver queries.
C32 dnsResCounterFallbacks	1.3.6.1.2.1.32.2.1.2.10	Counter32	read-only	Number of times the resolver had to fall back to its seat belt information.
dnsResCounterGroup	1.3.6.1.2.1.32.2.2.2			A collection of objects providing basic instrumentation of a DNS resolver implementation.
C32 dnsResCounterMartians	1.3.6.1.2.1.32.2.1.2.7	Counter32	read-only	Number of responses received which were received from servers that the resolver does not think it asked.
C32 dnsResCounterNonAuthDataResps	1.3.6.1.2.1.32.2.1.2.5	Counter32	read-only	Number of requests made by the resolver for which a non-authoritative answer (cached data) was received.
C32 dnsResCounterNonAuthNoDataResps	1.3.6.1.2.1.32.2.1.2.6	Counter32	read-only	Number of requests made by the resolver for which a non-authoritative answer - no such data response (empty answer) was received.
C32 dnsResCounterRecdResponses	1.3.6.1.2.1.32.2.1.2.8	Counter32	read-only	Number of responses received to all queries.
C32 dnsResCounterUnparseResps	1.3.6.1.2.1.32.2.1.2.9	Counter32	read-only	Number of responses received which were unparseable.
dnsResLameDelegation	1.3.6.1.2.1.32.2.1.3
DNS dnsResLameDelegationClass	1.3.6.1.2.1.32.2.1.3.2.1.3	DnsClass	not-accessible	DNS class of received lame delegation.
C32 dnsResLameDelegationCounts	1.3.6.1.2.1.32.2.1.3.2.1.4	Counter32	read-only	How many times this lame delegation has been received.
dnsResLameDelegationEntry	1.3.6.1.2.1.32.2.1.3.2.1		not-accessible	Entry in lame delegation table. Only the resolver may create rows in this table. SNMP SET requests may be used to delete rows.
dnsResLameDelegationGroup	1.3.6.1.2.1.32.2.2.3			A collection of objects providing instrumentation of `lame delegation' failures.
DNS dnsResLameDelegationName	1.3.6.1.2.1.32.2.1.3.2.1.2	DnsNameAsIndex	not-accessible	DNS name for which lame delegation was received.
C32 dnsResLameDelegationOverflows	1.3.6.1.2.1.32.2.1.3.1	Counter32	read-only	Number of times the resolver attempted to add an entry to the Lame Delegation table but was unable to for some reason such as space constraints.
IP dnsResLameDelegationSource	1.3.6.1.2.1.32.2.1.3.2.1.1	IpAddress	not-accessible	Source of lame delegation.
ROW dnsResLameDelegationStatus	1.3.6.1.2.1.32.2.1.3.2.1.5	RowStatus	read-write	Status column for the lame delegation table. Since only the agent (DNS resolver) creates rows in this table, the only values that a manager may write to this variable are active(1) and destroy(6).
dnsResLameDelegationTable	1.3.6.1.2.1.32.2.1.3.2		not-accessible	Table of name servers returning lame delegations. A lame delegation has occured when a parent zone delegates authority for a child zone to a server that appears not to think that it is authoritative for the child zone in question.
dnsResMIB	1.3.6.1.2.1.32.2			The MIB module for entities implementing the client (resolver) side of the Domain Name System (DNS) protocol.
dnsResMIBCompliance	1.3.6.1.2.1.32.2.3.1			The compliance statement for agents implementing the DNS resolver MIB extensions.
dnsResMIBCompliances	1.3.6.1.2.1.32.2.3
dnsResMIBGroups	1.3.6.1.2.1.32.2.2
dnsResMIBObjects	1.3.6.1.2.1.32.2.1
dnsResNCache	1.3.6.1.2.1.32.2.1.5
C32 dnsResNCacheBadNCaches	1.3.6.1.2.1.32.2.1.5.4	Counter32	read-only	Number of authoritative errors the resolver would have liked to cache but was unable to because the appropriate SOA RR was not supplied or looked suspicious.
INT dnsResNCacheErrCode	1.3.6.1.2.1.32.2.1.5.5.1.7	INTEGER	read-only	The authoritative error that has been cached: nonexistantName(1) indicates an authoritative name error (RCODE = 3). noData(2) indicates an authoritative response with no error (RCODE = 0) and no relevant data. other(3) indicates some other cached authoritative error. At present, no such errors are known to exist.
DNS dnsResNCacheErrElapsedTTL	1.3.6.1.2.1.32.2.1.5.5.1.5	DnsTime	read-only	Elapsed seconds since authoritative error was received.
dnsResNCacheErrEntry	1.3.6.1.2.1.32.2.1.5.5.1		not-accessible	An entry in the resolver's negative response cache table. Only the resolver can create rows. SNMP SET requests may be used to delete rows.
I32 dnsResNCacheErrIndex	1.3.6.1.2.1.32.2.1.5.5.1.9	Integer32	read-only	A value which makes entries in the table unique when the other index values (dnsResNCacheErrQName, dnsResNCacheErrQClass, and dnsResNCacheErrQType) do not provide a unique index.
DNS dnsResNCacheErrPrettyName	1.3.6.1.2.1.32.2.1.5.5.1.10	DnsName	read-only	QNAME associated with this row in the table. This is identical to the dnsResNCacheErrQName variable, except that character case is preserved in this variable, per DNS conventions.
DNS dnsResNCacheErrQClass	1.3.6.1.2.1.32.2.1.5.5.1.2	DnsQClass	not-accessible	DNS QCLASS associated with a cached authoritative error.
DNS dnsResNCacheErrQName	1.3.6.1.2.1.32.2.1.5.5.1.1	DnsNameAsIndex	not-accessible	QNAME associated with a cached authoritative error.
DNS dnsResNCacheErrQType	1.3.6.1.2.1.32.2.1.5.5.1.3	DnsQType	not-accessible	DNS QTYPE associated with a cached authoritative error.
IP dnsResNCacheErrSource	1.3.6.1.2.1.32.2.1.5.5.1.6	IpAddress	read-only	Host which sent the authoritative error, 0.0.0.0 if unknown.
ROW dnsResNCacheErrStatus	1.3.6.1.2.1.32.2.1.5.5.1.8	RowStatus	read-write	Status column for the resolver negative response cache table. Since only the agent (DNS resolver) creates rows in this table, the only values that a manager may write to this variable are active(1) and destroy(6).
dnsResNCacheErrTable	1.3.6.1.2.1.32.2.1.5.5		not-accessible	The resolver's negative response cache. This table contains information about authoritative errors that have been cached by the resolver.
DNS dnsResNCacheErrTTL	1.3.6.1.2.1.32.2.1.5.5.1.4	DnsTime	read-only	Time-To-Live of a cached authoritative error at the time of the error, it should not be decremented by the number of seconds since it was received. This should be the TTL as copied from the MINIMUM field of the SOA that accompanied the authoritative error, or a smaller value if the resolver implements a ceiling on negative response cache TTLs.
C32 dnsResNCacheGoodNCaches	1.3.6.1.2.1.32.2.1.5.3	Counter32	read-only	Number of authoritative errors the resolver has cached successfully.
dnsResNCacheGroup	1.3.6.1.2.1.32.2.2.5			A collection of objects providing access to and control of a DNS resolver's negative response cache.
DNS dnsResNCacheMaxTTL	1.3.6.1.2.1.32.2.1.5.2	DnsTime	read-write	Maximum Time-To-Live for cached authoritative errors. If the resolver does not implement a TTL ceiling, the value of this field should be zero.
INT dnsResNCacheStatus	1.3.6.1.2.1.32.2.1.5.1	INTEGER	read-write	Status/action for the resolver's negative response cache. enabled(1) means that the use of the negative response cache is allowed. Query operations can return this state. disabled(2) means that the negative response cache is not being used. Query operations can return this state. Setting this variable to clear(3) deletes the entire contents of the resolver's negative response cache. The status will retain its previous value from before the clear operation (i.e., enabled(1) or disabled(2)). The value of clear(3) can NOT be returned by a query operation.
dnsResOptCounter	1.3.6.1.2.1.32.2.1.6
dnsResOptCounterGroup	1.3.6.1.2.1.32.2.2.6			A collection of objects providing further instrumentation applicable to many but not all DNS resolvers.
C32 dnsResOptCounterInternals	1.3.6.1.2.1.32.2.1.6.5	Counter32	read-only	Number of requests internally generated by the resolver.
C32 dnsResOptCounterInternalTimeOuts	1.3.6.1.2.1.32.2.1.6.6	Counter32	read-only	Number of requests internally generated which timed out.
C32 dnsResOptCounterNoResponses	1.3.6.1.2.1.32.2.1.6.3	Counter32	read-only	Number of queries that were retransmitted because of no response.
C32 dnsResOptCounterReferals	1.3.6.1.2.1.32.2.1.6.1	Counter32	read-only	Number of responses which were received from servers redirecting query to another server.
C32 dnsResOptCounterRetrans	1.3.6.1.2.1.32.2.1.6.2	Counter32	read-only	Number requests retransmitted for all reasons.
C32 dnsResOptCounterRootRetrans	1.3.6.1.2.1.32.2.1.6.4	Counter32	read-only	Number of queries that were retransmitted that were to root servers.

OID symbolic	OID numeric	Type	Access	Description
dnsResMIB	1.3.6.1.2.1.32.2			The MIB module for entities implementing the client (resolver) side of the Domain Name System (DNS) protocol.
dnsResMIBObjects	1.3.6.1.2.1.32.2.1
dnsResConfig	1.3.6.1.2.1.32.2.1.1
STR dnsResConfigImplementIdent	1.3.6.1.2.1.32.2.1.1.1	DisplayString	read-only	The implementation identification string for the resolver software in use on the system, for example; `RES-2.1'
INT dnsResConfigService	1.3.6.1.2.1.32.2.1.1.2	INTEGER	read-only	Kind of DNS resolution service provided: recursiveOnly(1) indicates a stub resolver. iterativeOnly(2) indicates a normal full service resolver. recursiveAndIterative(3) indicates a full-service resolver which performs a mix of recursive and iterative queries.
INT dnsResConfigMaxCnames	1.3.6.1.2.1.32.2.1.1.3	INTEGER	read-write	Limit on how many CNAMEs the resolver should allow before deciding that there's a CNAME loop. Zero means that resolver has no explicit CNAME limit.
dnsResConfigSbeltTable	1.3.6.1.2.1.32.2.1.1.4		not-accessible	Table of safety belt information used by the resolver when it hasn't got any better idea of where to send a query, such as when the resolver is booting or is a stub resolver.
dnsResConfigSbeltEntry	1.3.6.1.2.1.32.2.1.1.4.1		not-accessible	An entry in the resolver's Sbelt table. Rows may be created or deleted at any time by the DNS resolver and by SNMP SET requests. Whether the values changed via SNMP are saved in stable storage across `reset' operations is implementation-specific.
IP dnsResConfigSbeltAddr	1.3.6.1.2.1.32.2.1.1.4.1.1	IpAddress	not-accessible	The IP address of the Sbelt name server identified by this row of the table.
DNS dnsResConfigSbeltName	1.3.6.1.2.1.32.2.1.1.4.1.2	DnsName	read-create	The DNS name of a Sbelt nameserver identified by this row of the table. A zero-length string indicates that the name is not known by the resolver.
INT dnsResConfigSbeltRecursion	1.3.6.1.2.1.32.2.1.1.4.1.3	INTEGER	read-create	Kind of queries resolver will be sending to the name server identified in this row of the table: iterative(1) indicates that resolver will be directing iterative queries to this name server (RD bit turned off). recursive(2) indicates that resolver will be directing recursive queries to this name server (RD bit turned on). recursiveAndIterative(3) indicates that the resolver will be directing both recursive and iterative queries to the server identified in this row of the table.
INT dnsResConfigSbeltPref	1.3.6.1.2.1.32.2.1.1.4.1.4	INTEGER	read-create	This value identifies the preference for the name server identified in this row of the table. The lower the value, the more desirable the resolver considers this server.
DNS dnsResConfigSbeltSubTree	1.3.6.1.2.1.32.2.1.1.4.1.5	DnsNameAsIndex	not-accessible	Queries sent to the name server identified by this row of the table are limited to those for names in the name subtree identified by this variable. If no such limitation applies, the value of this variable is the name of the root domain (a DNS name consisting of a single zero octet).
DNS dnsResConfigSbeltClass	1.3.6.1.2.1.32.2.1.1.4.1.6	DnsClass	not-accessible	The class of DNS queries that will be sent to the server identified by this row of the table.
ROW dnsResConfigSbeltStatus	1.3.6.1.2.1.32.2.1.1.4.1.7	RowStatus	read-create	Row status column for this row of the Sbelt table.
DNS dnsResConfigUpTime	1.3.6.1.2.1.32.2.1.1.5	DnsTime	read-only	If the resolver has a persistent state (e.g., a process), this value will be the time elapsed since it started. For software without persistant state, this value will be 0.
DNS dnsResConfigResetTime	1.3.6.1.2.1.32.2.1.1.6	DnsTime	read-only	If the resolver has a persistent state (e.g., a process) and supports a `reset' operation (e.g., can be told to re-read configuration files), this value will be the time elapsed since the last time the resolver was `reset.' For software that does not have persistence or does not support a `reset' operation, this value will be zero.
INT dnsResConfigReset	1.3.6.1.2.1.32.2.1.1.7	INTEGER	read-write	Status/action object to reinitialize any persistant resolver state. When set to reset(2), any persistant resolver state (such as a process) is reinitialized as if the resolver had just been started. This value will never be returned by a read operation. When read, one of the following values will be returned: other(1) - resolver in some unknown state; initializing(3) - resolver (re)initializing; running(4) - resolver currently running.
dnsResCounter	1.3.6.1.2.1.32.2.1.2
dnsResCounterByOpcodeTable	1.3.6.1.2.1.32.2.1.2.3		not-accessible	Table of the current count of resolver queries and answers.
dnsResCounterByOpcodeEntry	1.3.6.1.2.1.32.2.1.2.3.1		not-accessible	Entry in the resolver counter table. Entries are indexed by DNS OpCode.
DNS dnsResCounterByOpcodeCode	1.3.6.1.2.1.32.2.1.2.3.1.1	DnsOpCode	not-accessible	The index to this table. The OpCodes that have already been defined are found in RFC-1035.
C32 dnsResCounterByOpcodeQueries	1.3.6.1.2.1.32.2.1.2.3.1.2	Counter32	read-only	Total number of queries that have sent out by the resolver since initialization for the OpCode which is the index to this row of the table.
C32 dnsResCounterByOpcodeResponses	1.3.6.1.2.1.32.2.1.2.3.1.3	Counter32	read-only	Total number of responses that have been received by the resolver since initialization for the OpCode which is the index to this row of the table.
dnsResCounterByRcodeTable	1.3.6.1.2.1.32.2.1.2.4		not-accessible	Table of the current count of responses to resolver queries.
dnsResCounterByRcodeEntry	1.3.6.1.2.1.32.2.1.2.4.1		not-accessible	Entry in the resolver response table. Entries are indexed by DNS response code.
DNS dnsResCounterByRcodeCode	1.3.6.1.2.1.32.2.1.2.4.1.1	DnsRespCode	not-accessible	The index to this table. The Response Codes that have already been defined are found in RFC-1035.
C32 dnsResCounterByRcodeResponses	1.3.6.1.2.1.32.2.1.2.4.1.2	Counter32	read-only	Number of responses the resolver has received for the response code value which identifies this row of the table.
C32 dnsResCounterNonAuthDataResps	1.3.6.1.2.1.32.2.1.2.5	Counter32	read-only	Number of requests made by the resolver for which a non-authoritative answer (cached data) was received.
C32 dnsResCounterNonAuthNoDataResps	1.3.6.1.2.1.32.2.1.2.6	Counter32	read-only	Number of requests made by the resolver for which a non-authoritative answer - no such data response (empty answer) was received.
C32 dnsResCounterMartians	1.3.6.1.2.1.32.2.1.2.7	Counter32	read-only	Number of responses received which were received from servers that the resolver does not think it asked.
C32 dnsResCounterRecdResponses	1.3.6.1.2.1.32.2.1.2.8	Counter32	read-only	Number of responses received to all queries.
C32 dnsResCounterUnparseResps	1.3.6.1.2.1.32.2.1.2.9	Counter32	read-only	Number of responses received which were unparseable.
C32 dnsResCounterFallbacks	1.3.6.1.2.1.32.2.1.2.10	Counter32	read-only	Number of times the resolver had to fall back to its seat belt information.
dnsResLameDelegation	1.3.6.1.2.1.32.2.1.3
C32 dnsResLameDelegationOverflows	1.3.6.1.2.1.32.2.1.3.1	Counter32	read-only	Number of times the resolver attempted to add an entry to the Lame Delegation table but was unable to for some reason such as space constraints.
dnsResLameDelegationTable	1.3.6.1.2.1.32.2.1.3.2		not-accessible	Table of name servers returning lame delegations. A lame delegation has occured when a parent zone delegates authority for a child zone to a server that appears not to think that it is authoritative for the child zone in question.
dnsResLameDelegationEntry	1.3.6.1.2.1.32.2.1.3.2.1		not-accessible	Entry in lame delegation table. Only the resolver may create rows in this table. SNMP SET requests may be used to delete rows.
IP dnsResLameDelegationSource	1.3.6.1.2.1.32.2.1.3.2.1.1	IpAddress	not-accessible	Source of lame delegation.
DNS dnsResLameDelegationName	1.3.6.1.2.1.32.2.1.3.2.1.2	DnsNameAsIndex	not-accessible	DNS name for which lame delegation was received.
DNS dnsResLameDelegationClass	1.3.6.1.2.1.32.2.1.3.2.1.3	DnsClass	not-accessible	DNS class of received lame delegation.
C32 dnsResLameDelegationCounts	1.3.6.1.2.1.32.2.1.3.2.1.4	Counter32	read-only	How many times this lame delegation has been received.
ROW dnsResLameDelegationStatus	1.3.6.1.2.1.32.2.1.3.2.1.5	RowStatus	read-write	Status column for the lame delegation table. Since only the agent (DNS resolver) creates rows in this table, the only values that a manager may write to this variable are active(1) and destroy(6).
dnsResCache	1.3.6.1.2.1.32.2.1.4
INT dnsResCacheStatus	1.3.6.1.2.1.32.2.1.4.1	INTEGER	read-write	Status/action for the resolver's cache. enabled(1) means that the use of the cache is allowed. Query operations can return this state. disabled(2) means that the cache is not being used. Query operations can return this state. Setting this variable to clear(3) deletes the entire contents of the resolver's cache, but does not otherwise change the resolver's state. The status will retain its previous value from before the clear operation (i.e., enabled(1) or disabled(2)). The value of clear(3) can NOT be returned by a query operation.
DNS dnsResCacheMaxTTL	1.3.6.1.2.1.32.2.1.4.2	DnsTime	read-write	Maximum Time-To-Live for RRs in this cache. If the resolver does not implement a TTL ceiling, the value of this field should be zero.
C32 dnsResCacheGoodCaches	1.3.6.1.2.1.32.2.1.4.3	Counter32	read-only	Number of RRs the resolver has cached successfully.
C32 dnsResCacheBadCaches	1.3.6.1.2.1.32.2.1.4.4	Counter32	read-only	Number of RRs the resolver has refused to cache because they appear to be dangerous or irrelevant. E.g., RRs with suspiciously high TTLs, unsolicited root information, or that just don't appear to be relevant to the question the resolver asked.
dnsResCacheRRTable	1.3.6.1.2.1.32.2.1.4.5		not-accessible	This table contains information about all the resource records currently in the resolver's cache.
dnsResCacheRREntry	1.3.6.1.2.1.32.2.1.4.5.1		not-accessible	An entry in the resolvers's cache. Rows may be created only by the resolver. SNMP SET requests may be used to delete rows.
DNS dnsResCacheRRName	1.3.6.1.2.1.32.2.1.4.5.1.1	DnsNameAsIndex	not-accessible	Owner name of the Resource Record in the cache which is identified in this row of the table. As described in RFC-1034, the owner of the record is the domain name were the RR is found.
DNS dnsResCacheRRClass	1.3.6.1.2.1.32.2.1.4.5.1.2	DnsClass	not-accessible	DNS class of the Resource Record in the cache which is identified in this row of the table.
DNS dnsResCacheRRType	1.3.6.1.2.1.32.2.1.4.5.1.3	DnsType	not-accessible	DNS type of the Resource Record in the cache which is identified in this row of the table.
DNS dnsResCacheRRTTL	1.3.6.1.2.1.32.2.1.4.5.1.4	DnsTime	read-only	Time-To-Live of RR in DNS cache. This is the initial TTL value which was received with the RR when it was originally received.
DNS dnsResCacheRRElapsedTTL	1.3.6.1.2.1.32.2.1.4.5.1.5	DnsTime	read-only	Elapsed seconds since RR was received.
IP dnsResCacheRRSource	1.3.6.1.2.1.32.2.1.4.5.1.6	IpAddress	read-only	Host from which RR was received, 0.0.0.0 if unknown.
OCT dnsResCacheRRData	1.3.6.1.2.1.32.2.1.4.5.1.7	OCTET STRING	read-only	RDATA portion of a cached RR. The value is in the format defined for the particular DNS class and type of the resource record.
ROW dnsResCacheRRStatus	1.3.6.1.2.1.32.2.1.4.5.1.8	RowStatus	read-write	Status column for the resolver cache table. Since only the agent (DNS resolver) creates rows in this table, the only values that a manager may write to this variable are active(1) and destroy(6).
I32 dnsResCacheRRIndex	1.3.6.1.2.1.32.2.1.4.5.1.9	Integer32	not-accessible	A value which makes entries in the table unique when the other index values (dnsResCacheRRName, dnsResCacheRRClass, and dnsResCacheRRType) do not provide a unique index.
DNS dnsResCacheRRPrettyName	1.3.6.1.2.1.32.2.1.4.5.1.10	DnsName	read-only	Name of the RR at this row in the table. This is identical to the dnsResCacheRRName variable, except that character case is preserved in this variable, per DNS conventions.
dnsResNCache	1.3.6.1.2.1.32.2.1.5
INT dnsResNCacheStatus	1.3.6.1.2.1.32.2.1.5.1	INTEGER	read-write	Status/action for the resolver's negative response cache. enabled(1) means that the use of the negative response cache is allowed. Query operations can return this state. disabled(2) means that the negative response cache is not being used. Query operations can return this state. Setting this variable to clear(3) deletes the entire contents of the resolver's negative response cache. The status will retain its previous value from before the clear operation (i.e., enabled(1) or disabled(2)). The value of clear(3) can NOT be returned by a query operation.
DNS dnsResNCacheMaxTTL	1.3.6.1.2.1.32.2.1.5.2	DnsTime	read-write	Maximum Time-To-Live for cached authoritative errors. If the resolver does not implement a TTL ceiling, the value of this field should be zero.
C32 dnsResNCacheGoodNCaches	1.3.6.1.2.1.32.2.1.5.3	Counter32	read-only	Number of authoritative errors the resolver has cached successfully.
C32 dnsResNCacheBadNCaches	1.3.6.1.2.1.32.2.1.5.4	Counter32	read-only	Number of authoritative errors the resolver would have liked to cache but was unable to because the appropriate SOA RR was not supplied or looked suspicious.
dnsResNCacheErrTable	1.3.6.1.2.1.32.2.1.5.5		not-accessible	The resolver's negative response cache. This table contains information about authoritative errors that have been cached by the resolver.
dnsResNCacheErrEntry	1.3.6.1.2.1.32.2.1.5.5.1		not-accessible	An entry in the resolver's negative response cache table. Only the resolver can create rows. SNMP SET requests may be used to delete rows.
DNS dnsResNCacheErrQName	1.3.6.1.2.1.32.2.1.5.5.1.1	DnsNameAsIndex	not-accessible	QNAME associated with a cached authoritative error.
DNS dnsResNCacheErrQClass	1.3.6.1.2.1.32.2.1.5.5.1.2	DnsQClass	not-accessible	DNS QCLASS associated with a cached authoritative error.
DNS dnsResNCacheErrQType	1.3.6.1.2.1.32.2.1.5.5.1.3	DnsQType	not-accessible	DNS QTYPE associated with a cached authoritative error.
DNS dnsResNCacheErrTTL	1.3.6.1.2.1.32.2.1.5.5.1.4	DnsTime	read-only	Time-To-Live of a cached authoritative error at the time of the error, it should not be decremented by the number of seconds since it was received. This should be the TTL as copied from the MINIMUM field of the SOA that accompanied the authoritative error, or a smaller value if the resolver implements a ceiling on negative response cache TTLs.
DNS dnsResNCacheErrElapsedTTL	1.3.6.1.2.1.32.2.1.5.5.1.5	DnsTime	read-only	Elapsed seconds since authoritative error was received.
IP dnsResNCacheErrSource	1.3.6.1.2.1.32.2.1.5.5.1.6	IpAddress	read-only	Host which sent the authoritative error, 0.0.0.0 if unknown.
INT dnsResNCacheErrCode	1.3.6.1.2.1.32.2.1.5.5.1.7	INTEGER	read-only	The authoritative error that has been cached: nonexistantName(1) indicates an authoritative name error (RCODE = 3). noData(2) indicates an authoritative response with no error (RCODE = 0) and no relevant data. other(3) indicates some other cached authoritative error. At present, no such errors are known to exist.
ROW dnsResNCacheErrStatus	1.3.6.1.2.1.32.2.1.5.5.1.8	RowStatus	read-write	Status column for the resolver negative response cache table. Since only the agent (DNS resolver) creates rows in this table, the only values that a manager may write to this variable are active(1) and destroy(6).
I32 dnsResNCacheErrIndex	1.3.6.1.2.1.32.2.1.5.5.1.9	Integer32	read-only	A value which makes entries in the table unique when the other index values (dnsResNCacheErrQName, dnsResNCacheErrQClass, and dnsResNCacheErrQType) do not provide a unique index.
DNS dnsResNCacheErrPrettyName	1.3.6.1.2.1.32.2.1.5.5.1.10	DnsName	read-only	QNAME associated with this row in the table. This is identical to the dnsResNCacheErrQName variable, except that character case is preserved in this variable, per DNS conventions.
dnsResOptCounter	1.3.6.1.2.1.32.2.1.6
C32 dnsResOptCounterReferals	1.3.6.1.2.1.32.2.1.6.1	Counter32	read-only	Number of responses which were received from servers redirecting query to another server.
C32 dnsResOptCounterRetrans	1.3.6.1.2.1.32.2.1.6.2	Counter32	read-only	Number requests retransmitted for all reasons.
C32 dnsResOptCounterNoResponses	1.3.6.1.2.1.32.2.1.6.3	Counter32	read-only	Number of queries that were retransmitted because of no response.
C32 dnsResOptCounterRootRetrans	1.3.6.1.2.1.32.2.1.6.4	Counter32	read-only	Number of queries that were retransmitted that were to root servers.
C32 dnsResOptCounterInternals	1.3.6.1.2.1.32.2.1.6.5	Counter32	read-only	Number of requests internally generated by the resolver.
C32 dnsResOptCounterInternalTimeOuts	1.3.6.1.2.1.32.2.1.6.6	Counter32	read-only	Number of requests internally generated which timed out.
dnsResMIBGroups	1.3.6.1.2.1.32.2.2
dnsResConfigGroup	1.3.6.1.2.1.32.2.2.1			A collection of objects providing basic configuration information for a DNS resolver implementation.
dnsResCounterGroup	1.3.6.1.2.1.32.2.2.2			A collection of objects providing basic instrumentation of a DNS resolver implementation.
dnsResLameDelegationGroup	1.3.6.1.2.1.32.2.2.3			A collection of objects providing instrumentation of `lame delegation' failures.
dnsResCacheGroup	1.3.6.1.2.1.32.2.2.4			A collection of objects providing access to and control of a DNS resolver's cache.
dnsResNCacheGroup	1.3.6.1.2.1.32.2.2.5			A collection of objects providing access to and control of a DNS resolver's negative response cache.
dnsResOptCounterGroup	1.3.6.1.2.1.32.2.2.6			A collection of objects providing further instrumentation applicable to many but not all DNS resolvers.
dnsResMIBCompliances	1.3.6.1.2.1.32.2.3
dnsResMIBCompliance	1.3.6.1.2.1.32.2.3.1			The compliance statement for agents implementing the DNS resolver MIB extensions.

Counter32 (21)
C32 dnsResCacheBadCaches	1.3.6.1.2.1.32.2.1.4.4	Counter32	read-only	Number of RRs the resolver has refused to cache because they appear to be dangerous or irrelevant. E.g., RRs with suspiciously high TTLs, unsolicited root information, or that just don't appear to be relevant to the question the resolver asked.
C32 dnsResCacheGoodCaches	1.3.6.1.2.1.32.2.1.4.3	Counter32	read-only	Number of RRs the resolver has cached successfully.
C32 dnsResCounterByOpcodeQueries	1.3.6.1.2.1.32.2.1.2.3.1.2	Counter32	read-only	Total number of queries that have sent out by the resolver since initialization for the OpCode which is the index to this row of the table.
C32 dnsResCounterByOpcodeResponses	1.3.6.1.2.1.32.2.1.2.3.1.3	Counter32	read-only	Total number of responses that have been received by the resolver since initialization for the OpCode which is the index to this row of the table.
C32 dnsResCounterByRcodeResponses	1.3.6.1.2.1.32.2.1.2.4.1.2	Counter32	read-only	Number of responses the resolver has received for the response code value which identifies this row of the table.
C32 dnsResCounterFallbacks	1.3.6.1.2.1.32.2.1.2.10	Counter32	read-only	Number of times the resolver had to fall back to its seat belt information.
C32 dnsResCounterMartians	1.3.6.1.2.1.32.2.1.2.7	Counter32	read-only	Number of responses received which were received from servers that the resolver does not think it asked.
C32 dnsResCounterNonAuthDataResps	1.3.6.1.2.1.32.2.1.2.5	Counter32	read-only	Number of requests made by the resolver for which a non-authoritative answer (cached data) was received.
C32 dnsResCounterNonAuthNoDataResps	1.3.6.1.2.1.32.2.1.2.6	Counter32	read-only	Number of requests made by the resolver for which a non-authoritative answer - no such data response (empty answer) was received.
C32 dnsResCounterRecdResponses	1.3.6.1.2.1.32.2.1.2.8	Counter32	read-only	Number of responses received to all queries.
C32 dnsResCounterUnparseResps	1.3.6.1.2.1.32.2.1.2.9	Counter32	read-only	Number of responses received which were unparseable.
C32 dnsResLameDelegationCounts	1.3.6.1.2.1.32.2.1.3.2.1.4	Counter32	read-only	How many times this lame delegation has been received.
C32 dnsResLameDelegationOverflows	1.3.6.1.2.1.32.2.1.3.1	Counter32	read-only	Number of times the resolver attempted to add an entry to the Lame Delegation table but was unable to for some reason such as space constraints.
C32 dnsResNCacheBadNCaches	1.3.6.1.2.1.32.2.1.5.4	Counter32	read-only	Number of authoritative errors the resolver would have liked to cache but was unable to because the appropriate SOA RR was not supplied or looked suspicious.
C32 dnsResNCacheGoodNCaches	1.3.6.1.2.1.32.2.1.5.3	Counter32	read-only	Number of authoritative errors the resolver has cached successfully.
C32 dnsResOptCounterInternals	1.3.6.1.2.1.32.2.1.6.5	Counter32	read-only	Number of requests internally generated by the resolver.
C32 dnsResOptCounterInternalTimeOuts	1.3.6.1.2.1.32.2.1.6.6	Counter32	read-only	Number of requests internally generated which timed out.
C32 dnsResOptCounterNoResponses	1.3.6.1.2.1.32.2.1.6.3	Counter32	read-only	Number of queries that were retransmitted because of no response.
C32 dnsResOptCounterReferals	1.3.6.1.2.1.32.2.1.6.1	Counter32	read-only	Number of responses which were received from servers redirecting query to another server.
C32 dnsResOptCounterRetrans	1.3.6.1.2.1.32.2.1.6.2	Counter32	read-only	Number requests retransmitted for all reasons.
C32 dnsResOptCounterRootRetrans	1.3.6.1.2.1.32.2.1.6.4	Counter32	read-only	Number of queries that were retransmitted that were to root servers.
DisplayString (1)
STR dnsResConfigImplementIdent	1.3.6.1.2.1.32.2.1.1.1	DisplayString	read-only	The implementation identification string for the resolver software in use on the system, for example; `RES-2.1'
DnsClass (3)
DNS dnsResCacheRRClass	1.3.6.1.2.1.32.2.1.4.5.1.2	DnsClass	not-accessible	DNS class of the Resource Record in the cache which is identified in this row of the table.
DNS dnsResConfigSbeltClass	1.3.6.1.2.1.32.2.1.1.4.1.6	DnsClass	not-accessible	The class of DNS queries that will be sent to the server identified by this row of the table.
DNS dnsResLameDelegationClass	1.3.6.1.2.1.32.2.1.3.2.1.3	DnsClass	not-accessible	DNS class of received lame delegation.
DnsName (3)
DNS dnsResCacheRRPrettyName	1.3.6.1.2.1.32.2.1.4.5.1.10	DnsName	read-only	Name of the RR at this row in the table. This is identical to the dnsResCacheRRName variable, except that character case is preserved in this variable, per DNS conventions.
DNS dnsResConfigSbeltName	1.3.6.1.2.1.32.2.1.1.4.1.2	DnsName	read-create	The DNS name of a Sbelt nameserver identified by this row of the table. A zero-length string indicates that the name is not known by the resolver.
DNS dnsResNCacheErrPrettyName	1.3.6.1.2.1.32.2.1.5.5.1.10	DnsName	read-only	QNAME associated with this row in the table. This is identical to the dnsResNCacheErrQName variable, except that character case is preserved in this variable, per DNS conventions.
DnsNameAsIndex (4)
DNS dnsResCacheRRName	1.3.6.1.2.1.32.2.1.4.5.1.1	DnsNameAsIndex	not-accessible	Owner name of the Resource Record in the cache which is identified in this row of the table. As described in RFC-1034, the owner of the record is the domain name were the RR is found.
DNS dnsResConfigSbeltSubTree	1.3.6.1.2.1.32.2.1.1.4.1.5	DnsNameAsIndex	not-accessible	Queries sent to the name server identified by this row of the table are limited to those for names in the name subtree identified by this variable. If no such limitation applies, the value of this variable is the name of the root domain (a DNS name consisting of a single zero octet).
DNS dnsResLameDelegationName	1.3.6.1.2.1.32.2.1.3.2.1.2	DnsNameAsIndex	not-accessible	DNS name for which lame delegation was received.
DNS dnsResNCacheErrQName	1.3.6.1.2.1.32.2.1.5.5.1.1	DnsNameAsIndex	not-accessible	QNAME associated with a cached authoritative error.
DnsOpCode (1)
DNS dnsResCounterByOpcodeCode	1.3.6.1.2.1.32.2.1.2.3.1.1	DnsOpCode	not-accessible	The index to this table. The OpCodes that have already been defined are found in RFC-1035.
DnsQClass (1)
DNS dnsResNCacheErrQClass	1.3.6.1.2.1.32.2.1.5.5.1.2	DnsQClass	not-accessible	DNS QCLASS associated with a cached authoritative error.
DnsQType (1)
DNS dnsResNCacheErrQType	1.3.6.1.2.1.32.2.1.5.5.1.3	DnsQType	not-accessible	DNS QTYPE associated with a cached authoritative error.
DnsRespCode (1)
DNS dnsResCounterByRcodeCode	1.3.6.1.2.1.32.2.1.2.4.1.1	DnsRespCode	not-accessible	The index to this table. The Response Codes that have already been defined are found in RFC-1035.
DnsTime (8)
DNS dnsResCacheMaxTTL	1.3.6.1.2.1.32.2.1.4.2	DnsTime	read-write	Maximum Time-To-Live for RRs in this cache. If the resolver does not implement a TTL ceiling, the value of this field should be zero.
DNS dnsResCacheRRElapsedTTL	1.3.6.1.2.1.32.2.1.4.5.1.5	DnsTime	read-only	Elapsed seconds since RR was received.
DNS dnsResCacheRRTTL	1.3.6.1.2.1.32.2.1.4.5.1.4	DnsTime	read-only	Time-To-Live of RR in DNS cache. This is the initial TTL value which was received with the RR when it was originally received.
DNS dnsResConfigResetTime	1.3.6.1.2.1.32.2.1.1.6	DnsTime	read-only	If the resolver has a persistent state (e.g., a process) and supports a `reset' operation (e.g., can be told to re-read configuration files), this value will be the time elapsed since the last time the resolver was `reset.' For software that does not have persistence or does not support a `reset' operation, this value will be zero.
DNS dnsResConfigUpTime	1.3.6.1.2.1.32.2.1.1.5	DnsTime	read-only	If the resolver has a persistent state (e.g., a process), this value will be the time elapsed since it started. For software without persistant state, this value will be 0.
DNS dnsResNCacheErrElapsedTTL	1.3.6.1.2.1.32.2.1.5.5.1.5	DnsTime	read-only	Elapsed seconds since authoritative error was received.
DNS dnsResNCacheErrTTL	1.3.6.1.2.1.32.2.1.5.5.1.4	DnsTime	read-only	Time-To-Live of a cached authoritative error at the time of the error, it should not be decremented by the number of seconds since it was received. This should be the TTL as copied from the MINIMUM field of the SOA that accompanied the authoritative error, or a smaller value if the resolver implements a ceiling on negative response cache TTLs.
DNS dnsResNCacheMaxTTL	1.3.6.1.2.1.32.2.1.5.2	DnsTime	read-write	Maximum Time-To-Live for cached authoritative errors. If the resolver does not implement a TTL ceiling, the value of this field should be zero.
DnsType (1)
DNS dnsResCacheRRType	1.3.6.1.2.1.32.2.1.4.5.1.3	DnsType	not-accessible	DNS type of the Resource Record in the cache which is identified in this row of the table.
INTEGER (8)
INT dnsResCacheStatus	1.3.6.1.2.1.32.2.1.4.1	INTEGER	read-write	Status/action for the resolver's cache. enabled(1) means that the use of the cache is allowed. Query operations can return this state. disabled(2) means that the cache is not being used. Query operations can return this state. Setting this variable to clear(3) deletes the entire contents of the resolver's cache, but does not otherwise change the resolver's state. The status will retain its previous value from before the clear operation (i.e., enabled(1) or disabled(2)). The value of clear(3) can NOT be returned by a query operation.
INT dnsResConfigMaxCnames	1.3.6.1.2.1.32.2.1.1.3	INTEGER	read-write	Limit on how many CNAMEs the resolver should allow before deciding that there's a CNAME loop. Zero means that resolver has no explicit CNAME limit.
INT dnsResConfigReset	1.3.6.1.2.1.32.2.1.1.7	INTEGER	read-write	Status/action object to reinitialize any persistant resolver state. When set to reset(2), any persistant resolver state (such as a process) is reinitialized as if the resolver had just been started. This value will never be returned by a read operation. When read, one of the following values will be returned: other(1) - resolver in some unknown state; initializing(3) - resolver (re)initializing; running(4) - resolver currently running.
INT dnsResConfigSbeltPref	1.3.6.1.2.1.32.2.1.1.4.1.4	INTEGER	read-create	This value identifies the preference for the name server identified in this row of the table. The lower the value, the more desirable the resolver considers this server.
INT dnsResConfigSbeltRecursion	1.3.6.1.2.1.32.2.1.1.4.1.3	INTEGER	read-create	Kind of queries resolver will be sending to the name server identified in this row of the table: iterative(1) indicates that resolver will be directing iterative queries to this name server (RD bit turned off). recursive(2) indicates that resolver will be directing recursive queries to this name server (RD bit turned on). recursiveAndIterative(3) indicates that the resolver will be directing both recursive and iterative queries to the server identified in this row of the table.
INT dnsResConfigService	1.3.6.1.2.1.32.2.1.1.2	INTEGER	read-only	Kind of DNS resolution service provided: recursiveOnly(1) indicates a stub resolver. iterativeOnly(2) indicates a normal full service resolver. recursiveAndIterative(3) indicates a full-service resolver which performs a mix of recursive and iterative queries.
INT dnsResNCacheErrCode	1.3.6.1.2.1.32.2.1.5.5.1.7	INTEGER	read-only	The authoritative error that has been cached: nonexistantName(1) indicates an authoritative name error (RCODE = 3). noData(2) indicates an authoritative response with no error (RCODE = 0) and no relevant data. other(3) indicates some other cached authoritative error. At present, no such errors are known to exist.
INT dnsResNCacheStatus	1.3.6.1.2.1.32.2.1.5.1	INTEGER	read-write	Status/action for the resolver's negative response cache. enabled(1) means that the use of the negative response cache is allowed. Query operations can return this state. disabled(2) means that the negative response cache is not being used. Query operations can return this state. Setting this variable to clear(3) deletes the entire contents of the resolver's negative response cache. The status will retain its previous value from before the clear operation (i.e., enabled(1) or disabled(2)). The value of clear(3) can NOT be returned by a query operation.
Integer32 (2)
I32 dnsResCacheRRIndex	1.3.6.1.2.1.32.2.1.4.5.1.9	Integer32	not-accessible	A value which makes entries in the table unique when the other index values (dnsResCacheRRName, dnsResCacheRRClass, and dnsResCacheRRType) do not provide a unique index.
I32 dnsResNCacheErrIndex	1.3.6.1.2.1.32.2.1.5.5.1.9	Integer32	read-only	A value which makes entries in the table unique when the other index values (dnsResNCacheErrQName, dnsResNCacheErrQClass, and dnsResNCacheErrQType) do not provide a unique index.
IpAddress (4)
IP dnsResCacheRRSource	1.3.6.1.2.1.32.2.1.4.5.1.6	IpAddress	read-only	Host from which RR was received, 0.0.0.0 if unknown.
IP dnsResConfigSbeltAddr	1.3.6.1.2.1.32.2.1.1.4.1.1	IpAddress	not-accessible	The IP address of the Sbelt name server identified by this row of the table.
IP dnsResLameDelegationSource	1.3.6.1.2.1.32.2.1.3.2.1.1	IpAddress	not-accessible	Source of lame delegation.
IP dnsResNCacheErrSource	1.3.6.1.2.1.32.2.1.5.5.1.6	IpAddress	read-only	Host which sent the authoritative error, 0.0.0.0 if unknown.
OCTET STRING (1)
OCT dnsResCacheRRData	1.3.6.1.2.1.32.2.1.4.5.1.7	OCTET STRING	read-only	RDATA portion of a cached RR. The value is in the format defined for the particular DNS class and type of the resource record.
RowStatus (4)
ROW dnsResCacheRRStatus	1.3.6.1.2.1.32.2.1.4.5.1.8	RowStatus	read-write	Status column for the resolver cache table. Since only the agent (DNS resolver) creates rows in this table, the only values that a manager may write to this variable are active(1) and destroy(6).
ROW dnsResConfigSbeltStatus	1.3.6.1.2.1.32.2.1.1.4.1.7	RowStatus	read-create	Row status column for this row of the Sbelt table.
ROW dnsResLameDelegationStatus	1.3.6.1.2.1.32.2.1.3.2.1.5	RowStatus	read-write	Status column for the lame delegation table. Since only the agent (DNS resolver) creates rows in this table, the only values that a manager may write to this variable are active(1) and destroy(6).
ROW dnsResNCacheErrStatus	1.3.6.1.2.1.32.2.1.5.5.1.8	RowStatus	read-write	Status column for the resolver negative response cache table. Since only the agent (DNS resolver) creates rows in this table, the only values that a manager may write to this variable are active(1) and destroy(6).
No type (29)
dnsResCache	1.3.6.1.2.1.32.2.1.4
dnsResCacheGroup	1.3.6.1.2.1.32.2.2.4			A collection of objects providing access to and control of a DNS resolver's cache.
dnsResCacheRREntry	1.3.6.1.2.1.32.2.1.4.5.1		not-accessible	An entry in the resolvers's cache. Rows may be created only by the resolver. SNMP SET requests may be used to delete rows.
dnsResCacheRRTable	1.3.6.1.2.1.32.2.1.4.5		not-accessible	This table contains information about all the resource records currently in the resolver's cache.
dnsResConfig	1.3.6.1.2.1.32.2.1.1
dnsResConfigGroup	1.3.6.1.2.1.32.2.2.1			A collection of objects providing basic configuration information for a DNS resolver implementation.
dnsResConfigSbeltEntry	1.3.6.1.2.1.32.2.1.1.4.1		not-accessible	An entry in the resolver's Sbelt table. Rows may be created or deleted at any time by the DNS resolver and by SNMP SET requests. Whether the values changed via SNMP are saved in stable storage across `reset' operations is implementation-specific.
dnsResConfigSbeltTable	1.3.6.1.2.1.32.2.1.1.4		not-accessible	Table of safety belt information used by the resolver when it hasn't got any better idea of where to send a query, such as when the resolver is booting or is a stub resolver.
dnsResCounter	1.3.6.1.2.1.32.2.1.2
dnsResCounterByOpcodeEntry	1.3.6.1.2.1.32.2.1.2.3.1		not-accessible	Entry in the resolver counter table. Entries are indexed by DNS OpCode.
dnsResCounterByOpcodeTable	1.3.6.1.2.1.32.2.1.2.3		not-accessible	Table of the current count of resolver queries and answers.
dnsResCounterByRcodeEntry	1.3.6.1.2.1.32.2.1.2.4.1		not-accessible	Entry in the resolver response table. Entries are indexed by DNS response code.
dnsResCounterByRcodeTable	1.3.6.1.2.1.32.2.1.2.4		not-accessible	Table of the current count of responses to resolver queries.
dnsResCounterGroup	1.3.6.1.2.1.32.2.2.2			A collection of objects providing basic instrumentation of a DNS resolver implementation.
dnsResLameDelegation	1.3.6.1.2.1.32.2.1.3
dnsResLameDelegationEntry	1.3.6.1.2.1.32.2.1.3.2.1		not-accessible	Entry in lame delegation table. Only the resolver may create rows in this table. SNMP SET requests may be used to delete rows.
dnsResLameDelegationGroup	1.3.6.1.2.1.32.2.2.3			A collection of objects providing instrumentation of `lame delegation' failures.
dnsResLameDelegationTable	1.3.6.1.2.1.32.2.1.3.2		not-accessible	Table of name servers returning lame delegations. A lame delegation has occured when a parent zone delegates authority for a child zone to a server that appears not to think that it is authoritative for the child zone in question.
dnsResMIB	1.3.6.1.2.1.32.2			The MIB module for entities implementing the client (resolver) side of the Domain Name System (DNS) protocol.
dnsResMIBCompliance	1.3.6.1.2.1.32.2.3.1			The compliance statement for agents implementing the DNS resolver MIB extensions.
dnsResMIBCompliances	1.3.6.1.2.1.32.2.3
dnsResMIBGroups	1.3.6.1.2.1.32.2.2
dnsResMIBObjects	1.3.6.1.2.1.32.2.1
dnsResNCache	1.3.6.1.2.1.32.2.1.5
dnsResNCacheErrEntry	1.3.6.1.2.1.32.2.1.5.5.1		not-accessible	An entry in the resolver's negative response cache table. Only the resolver can create rows. SNMP SET requests may be used to delete rows.
dnsResNCacheErrTable	1.3.6.1.2.1.32.2.1.5.5		not-accessible	The resolver's negative response cache. This table contains information about authoritative errors that have been cached by the resolver.
dnsResNCacheGroup	1.3.6.1.2.1.32.2.2.5			A collection of objects providing access to and control of a DNS resolver's negative response cache.
dnsResOptCounter	1.3.6.1.2.1.32.2.1.6
dnsResOptCounterGroup	1.3.6.1.2.1.32.2.2.6			A collection of objects providing further instrumentation applicable to many but not all DNS resolvers.

FAQ

How can DNS-RESOLVER-MIB help troubleshoot name-resolution problems on a server?
It exposes the resolver's configured DNS server addresses (search belt), server preference order, per-server recursion support, and max CNAMEs followed, along with query counters — so an operator can confirm which name servers are actually configured and spot query counters indicating resolution failures or misconfiguration.

Does DNS-RESOLVER-MIB tell you anything about the resolver software itself, not just its configuration?
Yes, it includes resolver implementation identity alongside query statistics/counters, useful for confirming which DNS resolver software is running on a host in addition to how it's configured.

RFC description

Defines management objects for DNS resolver configuration and statistics (RFC 1612).

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FAQ

RFC description