ALM-3276800109 Neighbor information is changed

Description

LLDP/4/NBRCHGTRAP: OID [OID] Neighbor information is changed. (LldpStatsRemTablesInserts=[integer], LldpStatsRemTablesDeletes=[integer], LldpStatsRemTablesDrops=[integer], LldpStatsRemTablesAgeouts=[integer])

This alarm is generated when a neighbor is added, deleted, discarded, or aged.

Attribute

Alarm ID	Alarm Severity	Alarm Type
3276800109	Warning	Equipment alarm

Parameters

Name	Meaning
OID	Indicates the MIB object ID of the alarm.
LldpStatsRemTablesInserts	Indicates the number of new neighbors.
LldpStatsRemTablesDeletes	Indicates the number of neighbors that are deleted.
LldpStatsRemTablesDrops	Indicates the number of neighbors that are discarded because of insufficient space.
LldpStatsRemTablesAgeouts	Indicates the number of neighbors that are aged.

Impact on the System

This alarm is a notification of changes in the network topology for the NMS, and no action is required.

Possible Causes

Cause 1:

A neighbor is found.

Cause 2:

A neighbor is deleted.

Cause 3:

A neighbor is aged.

Cause 4:

A neighbor is discarded because of insufficient space.

Procedure

Check the values of LldpStatsRemTablesInserts, LldpStatsRemTablesDeletes, LldpStatsRemTablesDrops, and LldpStatsRemTablesAgeouts in the alarm message.
- If the value of LldpStatsRemTablesInserts is not 0, go to Step 2.
- If the value of LldpStatsRemTablesDeletes is not 0, go to Step 3.
- If the value of LldpStatsRemTablesDrops is not 0, go to Step 4.
- If the value of LldpStatsRemTablesAgeouts is not 0, go to Step 5.
Neighbors are discovered, indicating that new devices are connected to the device or LLDP is enabled on some neighbors. This message is a normal notification and you do not need to handle it. Go to Step 6.
Some neighbors are deleted, indicating that LLDP is disabled on these neighbors or the neighbors are disconnected from the device. Check whether the administrator has disabled LLDP on these devices or disconnected these devices from the device.
- If the administrator has disabled LLDP on these devices or disconnected these devices from the device, go to Step 6.
- If not, rectify the link fault and go to Step 6.
The number of neighbors reaches the maximum (4096 on the entire device and 256 on each port). It is recommended that you disable LLDP on some minor ports to save information about the new neighbors. Go to Step 6.
Some neighbors are deleted after their aging time expires, indicating that the links between the neighbors and the device are faulty. Rectify the link fault and go to Step 6.
End.