All MIBs › IEEE8023-LAG-MIB › dot3adAggLinkDownNotification
dot3adAggLinkDownNotification
Module: IEEE8023-LAG-MIB
OID (symbolic): IEEE8023-LAG-MIB::dot3adAggLinkDownNotification
OID (numeric): 1.2.840.10006.300.43.0.2
Node type: NOTIFICATION-TYPE
Description:
When aAggLinkUpDownNotificationEnable is set to 'enabled,' a Link Down notification is generated when the Operational State of the Aggregator changes from 'up' to 'down.' When aAggLinkUpDownNotificationEnable is set to 'disabled,' no Link Down notifications are generated. The notification carries the identifier of the Aggregator whose state has changed.
What is dot3adAggLinkDownNotification?
This notification (trap) is sent when the operational state of a Link Aggregation Group (LAG) transitions from 'up' to 'down', provided that link up/down notifications are enabled. The trap includes the identifier of the specific aggregator that changed state. Network operators use this notification to quickly detect and respond to LAG failures, allowing them to restore redundancy and investigate the root cause of the aggregation failure.
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> '' IEEE8023-LAG-MIB::dot3adAggLinkDownNotification snmptrap -v2c -c public <manager> '' 1.2.840.10006.300.43.0.2
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]:51534->[192.168.30.10]:162]: DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (95494478) 11 days, 1:15:44.78 SNMPv2-MIB::snmpTrapOID.0 = OID: IEEE8023-LAG-MIB::dot3adAggLinkDownNotification
OID Breakdown
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.2 | member_body | IEEE802dot11-MIB |
| 1.2.840 | us | IEEE802dot11-MIB |
| 1.2.840.10006 | ieee802dot3 | START-MIB |
| 1.2.840.10006.300 | snmpmibs | START-MIB |
| 1.2.840.10006.300.43 | lagMIB | IEEE8023-LAG-MIB |
| 1.2.840.10006.300.43.0 | lagMIBNotifications | IEEE8023-LAG-MIB |
| 1.2.840.10006.300.43.0.2 | dot3adAggLinkDownNotification | IEEE8023-LAG-MIB |