Juniper-ISIS-MIB :: juniIsisSysIDFieldLenMismatches

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

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juniIsisSysIDFieldLenMismatches

Module: Juniper-ISIS-MIB

OID (symbolic): Juniper-ISIS-MIB::juniIsisSysIDFieldLenMismatches

OID (numeric): 1.3.6.1.4.1.4874.2.2.38.1.1.1.1.21

Node type: OBJECT-TYPE

Type: Counter32

Access: read-only

Description: Number of times a PDU is received with a different value for ID field length to that of the receiving system.

What is juniIsisSysIDFieldLenMismatches?

Read-only Counter32 tallying PDUs received with a different System ID field length than this router's own configuration. A rising count points to a neighboring IS-IS device configured with an incompatible ID length, which will prevent proper adjacency.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.4874.2.2.38.1.1.1.1.21
snmpwalk -v2c -c public <target> Juniper-ISIS-MIB::juniIsisSysIDFieldLenMismatches

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.4874.2.2.38.1.1.1.1.21.1
snmpget -v2c -c public <target> Juniper-ISIS-MIB::juniIsisSysIDFieldLenMismatches.1

Start monitoring Juniper E-series router (IS-IS routing protocol) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the Juniper-ISIS-MIB::juniIsisSysIDFieldLenMismatches OID value, configure state conditions and alerts, and monitor any Juniper E-series router (IS-IS routing protocol) from a single console.

OID Breakdown

Upper-level ancestors (9 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.4874juniperUniJuniper-UNI-SMI
1.3.6.1.4.1.4874.2juniperUniMibsJuniper-UNI-SMI
1.3.6.1.4.1.4874.2.2juniMibsJuniper-MIBs
Numeric OIDNameModule
1.3.6.1.4.1.4874.2.2.38juniIsisMIBJuniper-ISIS-MIB
1.3.6.1.4.1.4874.2.2.38.1juniIsisObjectsJuniper-ISIS-MIB
1.3.6.1.4.1.4874.2.2.38.1.1juniIsisSystemGroupJuniper-ISIS-MIB
1.3.6.1.4.1.4874.2.2.38.1.1.1juniIsisSysTableJuniper-ISIS-MIB
1.3.6.1.4.1.4874.2.2.38.1.1.1.1juniIsisSysEntryJuniper-ISIS-MIB
1.3.6.1.4.1.4874.2.2.38.1.1.1.1.21juniIsisSysIDFieldLenMismatchesJuniper-ISIS-MIB