DVMRP-MIB

All MIBs › DVMRP-MIB

Organization: IETF IDMR Working Group.

Last Updated: 1998-04-22

Category: Protocol: DVMRP, Technology: Multicast

Description: Manages Distance Vector Multicast Routing Protocol (DVMRP) routing tables, neighbors, and tunnel configuration.

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What Is DVMRP-MIB?

DVMRP-MIB is a vendor-neutral IETF standards MIB for managing routers running the Distance Vector Multicast Routing Protocol (DVMRP), a legacy dense-mode IP multicast routing protocol. It exposes routing-category data: the DVMRP implementation version, generation ID, route counts, per-interface configuration and operational state, and neighbor/tunnel addressing, along with a dedicated traps group for protocol events. Its monitoring value is centered on software/protocol status rather than physical hardware -- dvmrpInterfaceOperState reveals whether a multicast-enabled interface is functioning, dvmrpReachableRoutes and dvmrpNumRoutes indicate the health and scale of the multicast routing table, and dvmrpTraps notify on state changes such as neighbor loss. It is a self-contained routing protocol MIB but is typically deployed alongside the standard IGMP-MIB and multicast MIB family that provide adjacent group-membership context. It is typically deployed on legacy multicast-capable routers, as defined by the DVMRP-MIB RFC, in networks still running DVMRP for multicast backbone connectivity (largely superseded by PIM in modern networks).

IPNetwork Monitor allows you to monitor SNMP objects defined in DVMRP-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.

Supported Devices

vendor-neutral, standards-based MIB, not tied to a specific manufacturer
multicast-capable routers running DVMRP

Monitoring Examples

An administrator would poll dvmrpInterfaceTable (via dvmrpInterfaceEntry, indexed by dvmrpInterfaceIfIndex) to check dvmrpInterfaceOperState and dvmrpInterfaceType, confirming a tunnel or physical interface is operationally up for multicast forwarding. Watching dvmrpReachableRoutes against dvmrpNumRoutes over time would reveal a sudden drop in reachable multicast routes, indicating a neighbor or tunnel failure, while dvmrpGenerationId changing unexpectedly would flag a router restart or protocol resynchronization event surfaced via dvmrpTraps.

What Can Be Monitored

DVMRP interface operational state
reachable route count
total route count
neighbor/tunnel addressing
generation ID
DVMRP version

Imported Objects

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Gauge32
Integer32
IpAddress
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
TimeTicks
experimental

From SNMPv2-TC

DisplayString
RowStatus

How to Use in IPNetwork Monitor

Example using dvmrpInterfaceRcvBadPkts OID:

Select a Multicast router running DVMRP (vendor-neutral IETF standard) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type dvmrpInterfaceRcvBadPkts into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The number of DVMRP packets received on the interface by the DVMRP process which were subsequently discarded as invalid (e.g. invalid packet format, or a route report from an unknown neighbor). On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
dvmrp	1.3.6.1.3.62.1.1
IP dvmrpAltNetAddress	1.3.6.1.3.62.1.1.8.1.2	IpAddress	not-accessible	The subnet address of the alternate subnet.
dvmrpAltNetEntry	1.3.6.1.3.62.1.1.8.1		not-accessible	An entry (conceptual row) in the dvmrpAltNetTable.
I32 dvmrpAltNetIfIndex	1.3.6.1.3.62.1.1.8.1.1	Integer32	not-accessible	The ifIndex value of the interface to which this alternate subnet applies.
IP dvmrpAltNetMask	1.3.6.1.3.62.1.1.8.1.3	IpAddress	not-accessible	The subnet mask of the alternate subnet.
ROW dvmrpAltNetStatus	1.3.6.1.3.62.1.1.8.1.4	RowStatus	read-create	The status of this row, by which new entries may be created, or old entries deleted from this table.
dvmrpAltNetTable	1.3.6.1.3.62.1.1.8		not-accessible	The (conceptual) table listing the router's alternate subnets on physical interfaces for use in constructing the routing tables.
dvmrpGeneralGroup	1.3.6.1.3.62.2.2.2			A collection of objects used to describe general DVMRP configuration information.
I32 dvmrpGenerationId	1.3.6.1.3.62.1.1.2	Integer32	read-only	The generation identifier for the routing process. This is used by neighboring routers to detect whether the DVMRP routing table should be resent.
dvmrpInterfaceEntry	1.3.6.1.3.62.1.1.3.1		not-accessible	An entry (conceptual row) in the dvmrpInterfaceTable. This row augments ipMRouteInterfaceEntry in the IP Multicast MIB, where the threshold object resides.
dvmrpInterfaceGroup	1.3.6.1.3.62.2.2.3			A collection of objects used to describe DVMRP interface configuration and statistics.
I32 dvmrpInterfaceIfIndex	1.3.6.1.3.62.1.1.3.1.1	Integer32	not-accessible	The ifIndex value of the interface for which DVMRP is enabled.
C32 dvmrpInterfaceInOctets	1.3.6.1.3.62.1.1.3.1.11	Counter32	read-only	The number of octets in multicast packets that have arrived on the interface. This object has been moved to the IP Multicast MIB.
C32 dvmrpInterfaceInPkts	1.3.6.1.3.62.1.1.3.1.9	Counter32	read-only	The number of multicast packets that have arrived on the interface. This object is deprecated in favor of ifInMulticastPkts in the Interfaces MIB [8].
IP dvmrpInterfaceLocalAddress	1.3.6.1.3.62.1.1.3.1.4	IpAddress	read-create	The IP address this system will use as a source address on this interface. On unnumbered interfaces, it must be the same value as dvmrpInterfaceLocalAddress for some interface on the system.
STR dvmrpInterfaceMasterKey	1.3.6.1.3.62.1.1.3.1.17	DisplayString	read-create	The master (shared) key for authenticating neighbors on this interface. This object is intended solely for the purpose of setting the master key, and MUST be accessible only via requests using both authentication and privacy. The agent MAY report an empty string in response to get, get-next, get-bulk requests.
I32 dvmrpInterfaceMasterKeyVersion	1.3.6.1.3.62.1.1.3.1.18	Integer32	read-create	The highest version number of all known master keys used for authenticating neighbors on this interface.
I32 dvmrpInterfaceMetric	1.3.6.1.3.62.1.1.3.1.7	Integer32	read-create	The distance metric for this interface which is used to calculate distance vectors.
INT dvmrpInterfaceOperState	1.3.6.1.3.62.1.1.3.1.3	INTEGER	read-only	The current operational state of this DVMRP interface. This object is deprecated in favor of ifOperStatus.
C32 dvmrpInterfaceOutOctets	1.3.6.1.3.62.1.1.3.1.12	Counter32	read-only	The number of octets in multicast packets that have been sent on the interface. This object has been moved to the IP Multicast MIB.
C32 dvmrpInterfaceOutPkts	1.3.6.1.3.62.1.1.3.1.10	Counter32	read-only	The number of multicast packets that have been sent on the interface. This object is deprecated in favor of ifOutMulticastPkts in the Interfaces MIB [8].
I32 dvmrpInterfaceRateLimit	1.3.6.1.3.62.1.1.3.1.8	Integer32	read-create	The rate-limit, in kilobits per second, of forwarded multicast traffic on the interface. A rate-limit of 0 indicates that no rate limiting is done. This object has been moved to the IP Multicast MIB.
C32 dvmrpInterfaceRcvBadPktsEx	1.3.6.1.3.62.1.1.3.1.14	Counter32	read-only	The number of DVMRP packets received on the interface by the DVMRP process which were subsequently discarded as invalid (e.g. invalid packet format, or a route report from an unknown neighbor).
C32 dvmrpInterfaceRcvBadRoutes	1.3.6.1.3.62.1.1.3.1.15	Counter32	read-only	The number of routes, in valid DVMRP packets, which were ignored because the entry was invalid.
IP dvmrpInterfaceRemoteAddress	1.3.6.1.3.62.1.1.3.1.5	IpAddress	read-create	The IP address of the remote end of this DVMRP virtual interface. For a tunnel (including source routed), this is the IP address of the neighboring router. For a subnet, this is the subnet address. This object is deprecated in favor of address information associated with the underlying ifEntry.
IP dvmrpInterfaceRemoteSubnetMask	1.3.6.1.3.62.1.1.3.1.6	IpAddress	read-only	The subnet mask for a directly connected subnet. For a tunnel, this should be 0.0.0.0. This object is deprecated in favor of address information associated with the underlying ifEntry.
C32 dvmrpInterfaceSentRoutes	1.3.6.1.3.62.1.1.3.1.16	Counter32	read-only	The number of routes, in DVMRP Report packets, which have been sent on this interface. Together with dvmrpNeighborRcvRoutes at a peer, this object is useful for detecting routes being lost.
ROW dvmrpInterfaceStatus	1.3.6.1.3.62.1.1.3.1.13	RowStatus	read-create	The status of this entry. Creating the entry enables DVMRP on the virtual interface; destroying the entry or setting it to notInService disables DVMRP on the virtual interface.
dvmrpInterfaceTable	1.3.6.1.3.62.1.1.3		not-accessible	The (conceptual) table listing the router's multicast- capable interfaces.
INT dvmrpInterfaceType	1.3.6.1.3.62.1.1.3.1.2	INTEGER	read-only	The type of this DVMRP interface, whether it uses a tunnel, source routing, a physical interface for which we are a querier, or a physical interface for which we are not a querier. This object is deprecated in favor of ifType.
dvmrpMIB	1.3.6.1.3.62			The MIB module for management of DVMRP routers.
dvmrpMIBCompliance	1.3.6.1.3.62.2.1.1			The compliance statement for the DVMRP MIB.
dvmrpMIBCompliances	1.3.6.1.3.62.2.1
dvmrpMIBConformance	1.3.6.1.3.62.2
dvmrpMIBGroup	1.3.6.1.3.62.2.2.1			A collection of objects to support management of DVMRP routers.
dvmrpMIBGroups	1.3.6.1.3.62.2.2
dvmrpMIBObjects	1.3.6.1.3.62.1
IP dvmrpNeighborAddress	1.3.6.1.3.62.1.1.4.1.2	IpAddress	read-only	The IP address of the DVMRP neighbor for which this entry contains information.
BIT dvmrpNeighborCapabilities	1.3.6.1.3.62.1.1.4.1.9	Bits	read-only	This object describes the neighboring router's capabilities. The leaf bit indicates that the neighbor has only one interface with neighbors. The prune bit indicates that the neighbor supports pruning. The generationID bit indicates that the neighbor sends its generationID in Probe messages. The mtrace bit indicates that the neighbor can handle mtrace requests.
dvmrpNeighborEntry	1.3.6.1.3.62.1.1.4.1		not-accessible	An entry (conceptual row) in the dvmrpNeighborTable.
TIK dvmrpNeighborExpiryTime	1.3.6.1.3.62.1.1.4.1.4	TimeTicks	read-only	The minimum time remaining before this DVMRP neighbor will be aged out.
I32 dvmrpNeighborGenerationId	1.3.6.1.3.62.1.1.4.1.6	Integer32	read-only	The neighboring router's generation identifier.
dvmrpNeighborGroup	1.3.6.1.3.62.2.2.4			A collection of objects used to describe DVMRP peer configuration and statistics.
I32 dvmrpNeighborIfIndex	1.3.6.1.3.62.1.1.4.1.1	Integer32	read-only	The value of ifIndex for the virtual interface used to reach this DVMRP neighbor.
NTF dvmrpNeighborLoss	1.3.6.1.3.62.1.1.11.1			A dvmrpNeighborLoss trap signifies the loss of a 2-way adjacency with a neighbor. This trap should be generated when the neighbor state changes from active to one-way, ignoring, or down. The trap should be generated only if the router has no other neighbors on the same interface with a lower IP address than itself.
I32 dvmrpNeighborMajorVersion	1.3.6.1.3.62.1.1.4.1.7	Integer32	read-only	The neighboring router's major DVMRP version number.
I32 dvmrpNeighborMinorVersion	1.3.6.1.3.62.1.1.4.1.8	Integer32	read-only	The neighboring router's minor DVMRP version number.
NTF dvmrpNeighborNotPruning	1.3.6.1.3.62.1.1.11.2			A dvmrpNeighborNotPruning trap signifies that a non-pruning neighbor has been detected. This trap should be generated at most once per generation ID of the neighbor. For example, it may be generated at the time a neighbor is first heard from if the prune bit is not set in its capabilities. The trap should be generated only if the router has no other neighbors on the same interface with a lower IP address than itself.
C32 dvmrpNeighborRcvBadPkts	1.3.6.1.3.62.1.1.4.1.11	Counter32	read-only	The number of packet received from this neighbor which were discarded as invalid.
C32 dvmrpNeighborRcvBadRoutes	1.3.6.1.3.62.1.1.4.1.12	Counter32	read-only	The number of routes, in valid DVMRP packets received from this neighbor, which were ignored because the entry was invalid.
C32 dvmrpNeighborRcvRoutes	1.3.6.1.3.62.1.1.4.1.10	Counter32	read-only	The total number of routes received in valid DVMRP packets received from this neighbor. This can be used to diagnose problems such as unicast route injection, as well as giving an indication of the level of DVMRP route exchange activity.
INT dvmrpNeighborState	1.3.6.1.3.62.1.1.4.1.13	INTEGER	read-only	State of the neighbor adjacency.
dvmrpNeighborTable	1.3.6.1.3.62.1.1.4		not-accessible	The (conceptual) table listing the router's DVMRP neighbors, as discovered by receiving DVMRP messages.
TIK dvmrpNeighborUpTime	1.3.6.1.3.62.1.1.4.1.3	TimeTicks	read-only	The time since this DVMRP neighbor (last) became a neighbor of the local router.
G32 dvmrpNumRoutes	1.3.6.1.3.62.1.1.9	Gauge32	read-only	The number of entries in the routing table. This can be used to monitor the routing table size to detect illegal advertisements of unicast routes.
G32 dvmrpReachableRoutes	1.3.6.1.3.62.1.1.10	Gauge32	read-only	The number of entries in the routing table with non infinite metrics. This can be used to detect network partitions by observing the ratio of reachable routes to total routes.
dvmrpRouteEntry	1.3.6.1.3.62.1.1.5.1		not-accessible	An entry (conceptual row) containing the multicast routing information used by DVMRP in place of the unicast routing information.
TIK dvmrpRouteExpiryTime	1.3.6.1.3.62.1.1.5.1.6	TimeTicks	read-only	The minimum amount of time remaining before this entry will be aged out.
I32 dvmrpRouteIfIndex	1.3.6.1.3.62.1.1.5.1.4	Integer32	read-only	The value of ifIndex for the interface on which IP datagrams sent by these sources are received.
I32 dvmrpRouteMetric	1.3.6.1.3.62.1.1.5.1.5	Integer32	read-only	The distance in hops to the source subnet.
dvmrpRouteNextHopEntry	1.3.6.1.3.62.1.1.6.1		not-accessible	An entry (conceptual row) in the list of next hops on outgoing interfaces to which IP multicast datagrams from particular sources are routed.
I32 dvmrpRouteNextHopIfIndex	1.3.6.1.3.62.1.1.6.1.3	Integer32	not-accessible	The ifIndex value of the interface for the outgoing interface for this next hop.
IP dvmrpRouteNextHopSource	1.3.6.1.3.62.1.1.6.1.1	IpAddress	not-accessible	The network address which when combined with the corresponding value of dvmrpRouteNextHopSourceMask identifies the sources for which this entry specifies a next hop on an outgoing interface.
IP dvmrpRouteNextHopSourceMask	1.3.6.1.3.62.1.1.6.1.2	IpAddress	not-accessible	The network mask which when combined with the corresponding value of dvmrpRouteNextHopSource identifies the sources for which this entry specifies a next hop on an outgoing interface.
dvmrpRouteNextHopTable	1.3.6.1.3.62.1.1.6		not-accessible	The (conceptual) table containing information on the next hops on outgoing interfaces for routing IP multicast datagrams.
INT dvmrpRouteNextHopType	1.3.6.1.3.62.1.1.6.1.4	INTEGER	read-only	Type is leaf if no downstream dependent neighbors exist on the outgoing virtual interface. Otherwise, type is branch.
IP dvmrpRouteSource	1.3.6.1.3.62.1.1.5.1.1	IpAddress	not-accessible	The network address which when combined with the corresponding value of dvmrpRouteSourceMask identifies the sources for which this entry contains multicast routing information.
IP dvmrpRouteSourceMask	1.3.6.1.3.62.1.1.5.1.2	IpAddress	not-accessible	The network mask which when combined with the corresponding value of dvmrpRouteSource identifies the sources for which this entry contains multicast routing information.
dvmrpRouteTable	1.3.6.1.3.62.1.1.5		not-accessible	The table of routes learned through DVMRP route exchange.
IP dvmrpRouteUpstreamNeighbor	1.3.6.1.3.62.1.1.5.1.3	IpAddress	read-only	The address of the upstream neighbor (e.g., RPF neighbor) from which IP datagrams from these sources are received.
TIK dvmrpRouteUpTime	1.3.6.1.3.62.1.1.5.1.7	TimeTicks	read-only	The time since the route represented by this entry was learned by the router.
dvmrpRoutingGroup	1.3.6.1.3.62.2.2.5			A collection of objects used to store the DVMRP routing table.
dvmrpSecurityGroup	1.3.6.1.3.62.2.2.6			A collection of objects used to store information related to DVMRP security.
dvmrpTraps	1.3.6.1.3.62.1.1.11
STR dvmrpVersionString	1.3.6.1.3.62.1.1.1	DisplayString	read-only	The router's DVMRP version information.

RFC description

Defined in RFC 1075, manages Distance Vector Multicast Routing Protocol objects for IPv4 multicast routers implementing DVMRP.

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