RAPID-CITY :: rcSmltIstLinkDown

MIB Reference — IPNetwork Monitor · Updated September 21, 2026

All MIBs › RAPID-CITY › rcSmltIstLinkDown

rcSmltIstLinkDown

Module: RAPID-CITY

OID (symbolic): RAPID-CITY::rcSmltIstLinkDown

OID (numeric): 1.3.6.1.4.1.2272.1.21.18

Node type: NOTIFICATION-TYPE

Description: A rcSmltIstLinkDown trap signifies that the split MLT link is from up to down.

What is rcSmltIstLinkDown?

This notification (trap) is sent when a split MLT (Multi-Link Trunking) link transitions from up to down, indicating a link failure in a redundant trunk group. MLT uses multiple parallel links for aggregated bandwidth and redundancy; a single link down doesn't break the trunk but reduces capacity. An operator subscribes to this trap to be alerted immediately when trunk redundancy is compromised.

Examples

Send this trap to an SNMP manager — replace <manager> with the IP or hostname of your monitoring server (SNMPv2c):

snmptrap -v2c -c public <manager> '' RAPID-CITY::rcSmltIstLinkDown
snmptrap -v2c -c public <manager> '' 1.3.6.1.4.1.2272.1.21.18

Listen for incoming traps on the manager host (-f keeps it in the foreground, -Lo prints to stdout — useful for testing):

snmptrapd -f -Lo -c /dev/null authCommunity log public

Example snmptrapd log entry:

zoo11-linux.zoo [UDP: [192.168.30.111]:60809->[192.168.30.10]:162]:
  DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (161004425) 18 days, 15:14:04.25
  SNMPv2-MIB::snmpTrapOID.0 = OID: RAPID-CITY::rcSmltIstLinkDown

Start monitoring Bay Networks/Nortel Accelar and Ethernet Routing Switch (ERS) chassis switches with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the RAPID-CITY::rcSmltIstLinkDown OID value, configure state conditions and alerts, and monitor any Bay Networks/Nortel Accelar and Ethernet Routing Switch (ERS) chassis switches 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
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
Numeric OIDNameModule
1.3.6.1.4.1.2272rapidCityRAPID-CITY
1.3.6.1.4.1.2272.1rcMgmtRAPID-CITY
1.3.6.1.4.1.2272.1.21rcTrapsRAPID-CITY
1.3.6.1.4.1.2272.1.21.18rcSmltIstLinkDownRAPID-CITY