ISIS-MIB :: isisCircLevelIDOctet

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsISIS-MIBisisCircLevelIDOctet

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.

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 OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.2mgmtAXON-MIB
1.3.6.1.2.1mib_2AXON-MIB
Numeric OIDNameModule
1.3.6.1.2.1.138isisMIBISIS-MIB
1.3.6.1.2.1.138.1isisObjectsISIS-MIB
1.3.6.1.2.1.138.1.4isisCircLevelValuesISIS-MIB
1.3.6.1.2.1.138.1.4.1isisCircLevelTableISIS-MIB
1.3.6.1.2.1.138.1.4.1.1isisCircLevelEntryISIS-MIB
1.3.6.1.2.1.138.1.4.1.1.5isisCircLevelIDOctetISIS-MIB