BAS-ALIAS-SNMP-MIB

All MIBs › BAS-ALIAS-SNMP-MIB

Organization: Broadband Access Systems

Last Updated: 1998-10-08

Category: DOCSIS and Cable, SNMP Framework

Description: Defines SNMP alias and community configuration objects for BAS CMTS access control.

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What Is BAS-ALIAS-SNMP-MIB?

BAS-ALIAS-SNMP-MIB is a vendor-specific SNMP module (module basAliasSnmpMib) from Broadband Access Systems -- not "Bay Area Systems" as sometimes assumed -- of Marlboro, Massachusetts, defining Alias SNMP MIB-II-style objects for a Broadband Access System (BAS) chassis cluster, such as a multi-slot broadband access concentrator. It re-implements standard system and SNMP groups (basSysTable and basSnmpTable) but indexes every row by BAS-specific chassis-stack coordinates -- basSysChassis, basSysSlot, basSysIf, and basSysLPort -- imported from BAS-MIB, allowing the same sysDescr/sysUpTime/sysORTable-style data and SNMP engine counters (basSnmpInPkts, basSnmpInBadCommunityNames, basSnmpInASNParseErrs) to be reported per chassis/slot/interface/logical-port within a clustered chassis stack rather than per single device. It depends on BAS-MIB for its chassis/slot/interface textual conventions and is deployed alongside the vendor's core BAS chassis and interface MIBs; administrators can download the BAS-ALIAS-SNMP-MIB file to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in BAS-ALIAS-SNMP-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

Broadband Access Systems (BAS) chassis-stack broadband access concentrator

Monitoring Examples

An operator polls basSnmpInBadCommunityNames and basSnmpInASNParseErrs for a given basSysChassis/basSysSlot/basSysIf/basSysLPort combination to check whether a specific card in the chassis stack is being probed with invalid SNMP credentials or malformed requests, and a steadily climbing counter on one slot while others stay flat would indicate a misconfigured management station or a faulty card targeting that slot.

What Can Be Monitored

Per-chassis/slot/interface/logical-port system identity and uptime
SNMP object-resource (OR) table capabilities per card
SNMP inbound packet, bad-version, and bad-community counters per card
ASN.1/BER parse error counts
Silent and proxy PDU drop counters
Authentication-failure trap enable state

Imported Objects

From BAS-MIB

BasChassisId
BasInterfaceId
BasLogicalPortId
BasSlotId
basAliasSnmp	OBJECT-IDENTITY

From SNMPv2-SMI

Counter32
MODULE-IDENTITY
OBJECT-TYPE
TimeTicks

From SNMPv2-TC

DisplayString
TimeStamp

How to Use in IPNetwork Monitor

Example using basSnmpInPkts OID:

Select a Broadband Access Systems (BAS) CMT (legacy) 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 basSnmpInPkts 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 total number of messages delivered to the SNMP entity from the transport service. 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 sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
basAliasSnmpMib	1.3.6.1.4.1.3493.2.7.1.1			This MIB module defines the Alias SNMP MIB objects for a Broadband Access System Cluster.
basSnmp	1.3.6.1.4.1.3493.2.7.1.1.1
basSnmpTable	1.3.6.1.4.1.3493.2.7.1.1.1.1		not-accessible	Per Chassis Stack MIB-II system objects.
basSnmpEntry	1.3.6.1.4.1.3493.2.7.1.1.1.1.1		not-accessible	MIB-II system objects for a Chassis Stack.
C32 basSnmpInPktsEx	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.1	Counter32	read-only	The total number of messages delivered to the SNMP entity from the transport service.
C32 basSnmpInBadVersions	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.3	Counter32	read-only	The total number of SNMP messages which were delivered to the SNMP entity and were for an unsupported SNMP version.
C32 basSnmpInBadCommunityNames	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.4	Counter32	read-only	The total number of SNMP messages delivered to the SNMP entity which used a SNMP community name not known to said entity.
C32 basSnmpInBadCommunityUses	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.5	Counter32	read-only	The total number of SNMP messages delivered to the SNMP entity which represented an SNMP operation which was not allowed by the SNMP community named in the message.
C32 basSnmpInASNParseErrs	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.6	Counter32	read-only	The total number of ASN.1 or BER errors encountered by the SNMP entity when decoding received SNMP messages.
INT basSnmpEnableAuthenTraps	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.30	INTEGER	read-write	Indicates whether the SNMP entity is permitted to generate authenticationFailure traps. The value of this object overrides any configuration information; as such, it provides a means whereby all authenticationFailure traps may be disabled. Note that it is strongly recommended that this object be stored in non-volatile memory so that it remains constant across re-initializations of the network management system.
C32 basSnmpSilentDrops	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.31	Counter32	read-only	The total number of GetRequest-PDUs, GetNextRequest-PDUs, GetBulkRequest-PDUs, SetRequest-PDUs, and InformRequest-PDUs delivered to the SNMP entity which were silently dropped because the size of a reply containing an alternate Response-PDU with an empty variable-bindings field was greater than either a local constraint or the maximum message size associated with the originator of the request.
C32 basSnmpProxyDrops	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.32	Counter32	read-only	The total number of GetRequest-PDUs, GetNextRequest-PDUs, GetBulkRequest-PDUs, SetRequest-PDUs, and InformRequest-PDUs delivered to the SNMP entity which were silently dropped because the transmission of the (possibly translated) message to a proxy target failed in a manner (other than a time-out) such that no Response-PDU could be returned.
BAS basSnmpChassis	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.33	BasChassisId	not-accessible	The BAS Chassis ID of this card.
BAS basSnmpSlot	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.34	BasSlotId	not-accessible	The BAS Slot ID of this card.
NUM basSnmpIf	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.35	BasInterfaceId	not-accessible	The BAS interface ID of this card.
BAS basSnmpLPort	1.3.6.1.4.1.3493.2.7.1.1.1.1.1.36	BasLogicalPortId	not-accessible	The BAS logical port ID of this card.
basSystem	1.3.6.1.4.1.3493.2.7.1.1.2
basSysTable	1.3.6.1.4.1.3493.2.7.1.1.2.1		not-accessible	Per Chassis Stack MIB-II system objects.
basSysEntry	1.3.6.1.4.1.3493.2.7.1.1.2.1.1		not-accessible	MIB-II system objects for a Chassis Stack.
STR basSysDescr	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.1	DisplayString	read-only	A textual description of the entity. This value should include the full name and version identification of the system's hardware type, software operating-system, and networking software.
OID basSysObjectID	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.2	OBJECT IDENTIFIER	read-only	The vendor's authoritative identification of the network management subsystem contained in the entity. This value is allocated within the SMI enterprises subtree (1.3.6.1.4.1) and provides an easy and unambiguous means for determining `what kind of box' is being managed. For example, if vendor `Flintstones, Inc.' was assigned the subtree 1.3.6.1.4.1.4242, it could assign the identifier 1.3.6.1.4.1.4242.1.1 to its `Fred Router'.
TIK basSysUpTime	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.3	TimeTicks	read-only	The time (in hundredths of a second) since the network management portion of the system was last re-initialized.
STR basSysContact	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.4	DisplayString	read-write	The textual identification of the contact person for this managed node, together with information on how to contact this person. If no contact information is known, the value is the zero-length string.
STR basSysName	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.5	DisplayString	read-write	An administratively-assigned name for this managed node. By convention, this is the node's fully-qualified domain name. If the name is unknown, the value is the zero-length string.
STR basSysLocation	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.6	DisplayString	read-write	The physical location of this node (e.g., `telephone closet, 3rd floor'). If the location is unknown, the value is the zero-length string.
INT basSysServices	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.7	INTEGER	read-only	A value which indicates the set of services that this entity may potentially offers. The value is a sum. This sum initially takes the value zero, Then, for each layer, L, in the range 1 through 7, that this node performs transactions for, 2 raised to (L - 1) is added to the sum. For example, a node which performs only routing functions would have a value of 4 (2^(3-1)). In contrast, a node which is a host offering application services would have a value of 72 (2^(4-1) + 2^(7-1)). Note that in the context of the Internet suite of protocols, values should be calculated accordingly: layer functionality 1 physical (e.g., repeaters) 2 datalink/subnetwork (e.g., bridges) 3 internet (e.g., supports the IP) 4 end-to-end (e.g., supports the TCP) 7 applications (e.g., supports the SMTP) For systems including OSI protocols, layers 5 and 6 may also be counted.
TIM basSysORLastChange	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.8	TimeStamp	read-only	The value of sysUpTime at the time of the most recent change in state or value of any instance of sysORID.
BAS basSysChassis	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.9	BasChassisId	not-accessible	The BAS Chassis ID of this card.
BAS basSysSlot	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.10	BasSlotId	not-accessible	The BAS Slot ID of this card.
NUM basSysIf	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.11	BasInterfaceId	not-accessible	The BAS interface ID of this card.
BAS basSysLPort	1.3.6.1.4.1.3493.2.7.1.1.2.1.1.12	BasLogicalPortId	not-accessible	The BAS logical port ID of this card.
basSysORTable	1.3.6.1.4.1.3493.2.7.1.1.2.2		not-accessible	The (conceptual) table listing the capabilities of the local SNMPv2 entity acting in an agent role with respect to various MIB modules. SNMPv2 entities having dynamically- configurable support of MIB modules will have a dynamically-varying number of conceptual rows.
basSysOREntry	1.3.6.1.4.1.3493.2.7.1.1.2.2.1		not-accessible	An entry (conceptual row) in the basSysORTable.
INT basSysORIndex	1.3.6.1.4.1.3493.2.7.1.1.2.2.1.1	INTEGER	not-accessible	The auxiliary variable used for identifying instances of the columnar objects in the basSysORTable.
OID basSysORID	1.3.6.1.4.1.3493.2.7.1.1.2.2.1.2	OBJECT IDENTIFIER	read-only	An authoritative identification of a capabilities statement with respect to various MIB modules supported by the local SNMPv2 entity acting in an agent role.
STR basSysORDescr	1.3.6.1.4.1.3493.2.7.1.1.2.2.1.3	DisplayString	read-only	A textual description of the capabilities identified by the corresponding instance of basSysORID.
TIM basSysORUpTime	1.3.6.1.4.1.3493.2.7.1.1.2.2.1.4	TimeStamp	read-only	The value of basSysUpTime at the time this conceptual row was last instanciated.
BAS basSysORChassis	1.3.6.1.4.1.3493.2.7.1.1.2.2.1.5	BasChassisId	not-accessible	The BAS Chassis ID of this card.
BAS basSysORSlot	1.3.6.1.4.1.3493.2.7.1.1.2.2.1.6	BasSlotId	not-accessible	The BAS Slot ID of this card.
NUM basSysORIf	1.3.6.1.4.1.3493.2.7.1.1.2.2.1.7	BasInterfaceId	not-accessible	The BAS interface ID of this card.
BAS basSysORLPort	1.3.6.1.4.1.3493.2.7.1.1.2.2.1.8	BasLogicalPortId	not-accessible	The BAS logical port ID of this card.

RFC description

Bay Area Systems enterprise MIB for alias management via SNMP; vendor-private extension for network alias configuration.

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Download BAS-ALIAS-SNMP-MIB