All MIBs › ISIS-MIB › isisCircLevelIDOctet
isisCircLevelIDOctet
Module: ISIS-MIB
OID (symbolic): ISIS-MIB::isisCircLevelIDOctet
OID (numeric): 1.3.6.1.2.1.138.1.4.1.1.5
Node type: OBJECT-TYPE
Type: Unsigned32
Access: read-only
Description: A one-byte identifier for the circuit selected by the Intermediate System.
On point-to-point circuits, the value is used as the Local Circuit ID in point-to-point IIH PDUs transmitted on this circuit. In this case, values of isisCircLevelIDOctet do not need to be unique.
For broadcast circuits, the value is used to generate the LAN ID that will be used if this Intermediate System is elected as the Designated IS on this circuit. The value is required to differ on LANs where the Intermediate System is the Designated Intermediate System.
What is isisCircLevelIDOctet?
A one-byte circuit identifier the router picks for this circuit. On point-to-point links it's simply used in transmitted hellos and doesn't need to be unique; on broadcast (LAN) circuits it feeds into the LAN ID this router would use if elected Designated IS, so on LANs where it is the DIS, the value must be unique.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.138.1.4.1.1.5 snmpwalk -v2c -c public <target> ISIS-MIB::isisCircLevelIDOctet
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.138.1.4.1.1.5.1 snmpget -v2c -c public <target> ISIS-MIB::isisCircLevelIDOctet.1
SNMPv3 example:
snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> isisCircLevelIDOctet.1
Start monitoring Vendor-neutral IETF standard, RFC 4444 (router/Layer 3 switch running IS-IS) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the ISIS-MIB::isisCircLevelIDOctet OID value, configure state conditions and alerts, and monitor any Vendor-neutral IETF standard, RFC 4444 (router/Layer 3 switch running IS-IS) from a single console.
OID Breakdown
Upper-level ancestors (6 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.2 | mgmt | APERTUS-NPG-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.138 | isisMIB | ISIS-MIB |
| 1.3.6.1.2.1.138.1 | isisObjects | ISIS-MIB |
| 1.3.6.1.2.1.138.1.4 | isisCircLevelValues | ISIS-MIB |
| 1.3.6.1.2.1.138.1.4.1 | isisCircLevelTable | ISIS-MIB |
| 1.3.6.1.2.1.138.1.4.1.1 | isisCircLevelEntry | ISIS-MIB |
| 1.3.6.1.2.1.138.1.4.1.1.5 | isisCircLevelIDOctet | ISIS-MIB |