STN-EXTIF-MIB :: stnExtIfL3SubnetIfInstance

MIB Reference — IPNetwork Monitor · Updated October 02, 2026

All MIBs › STN-EXTIF-MIB › stnExtIfL3SubnetIfInstance

stnExtIfL3SubnetIfInstance

Module: STN-EXTIF-MIB

OID (symbolic): STN-EXTIF-MIB::stnExtIfL3SubnetIfInstance

OID (numeric): 1.3.6.1.4.1.3551.3.1.1.2.1.3

Node type: OBJECT-TYPE

Type: Integer32

Access: read-only

Description: The subnet interface instance associated with the L3 interface name.

What is stnExtIfL3SubnetIfInstance?

This read-only Integer32 gives the subnet interface instance number associated with a given Layer 3 interface name, distinguishing multiple subnet instances that may exist on the same L3 interface. An admin uses it when a routed interface carries more than one subnet, to identify which specific subnet instance a row's IP address and mask belong to. For example, interface 'Vlan10' might have subnet instance 1 for its primary subnet and instance 2 for a secondary one.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.3551.3.1.1.2.1.3
snmpwalk -v2c -c public <target> STN-EXTIF-MIB::stnExtIfL3SubnetIfInstance

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.3551.3.1.1.2.1.3.1
snmpget -v2c -c public <target> STN-EXTIF-MIB::stnExtIfL3SubnetIfInstance.1

Start monitoring Spring Tide Networks (Lucent) routing/switching platform (interface name/ifIndex lookup) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the STN-EXTIF-MIB::stnExtIfL3SubnetIfInstance OID value, configure state conditions and alerts, and monitor any Spring Tide Networks (Lucent) routing/switching platform (interface name/ifIndex lookup) from a single console.

OID Breakdown

Upper-level ancestors (8 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
1.3.6.1.4.1.3551springtidenetSPRING-TIDE-NETWORKS-SMI
1.3.6.1.4.1.3551.3stnExtensionsSPRING-TIDE-NETWORKS-SMI
Numeric OIDNameModule
1.3.6.1.4.1.3551.3.1stnExtIfSTN-EXTIF-MIB
1.3.6.1.4.1.3551.3.1.1stnExtIfObjectsSTN-EXTIF-MIB
1.3.6.1.4.1.3551.3.1.1.2stnExtIfL3TableSTN-EXTIF-MIB
1.3.6.1.4.1.3551.3.1.1.2.1stnExtIfL3EntrySTN-EXTIF-MIB
1.3.6.1.4.1.3551.3.1.1.2.1.3stnExtIfL3SubnetIfInstanceSTN-EXTIF-MIB