ISIS_1.3.6.1.3.37.2.0.14 isisLSPTooLargeToPropagate

Description

ISIS/4/LARGE_LSP:OID [oid] The length of the PDU to be sent is greater than the MTU. (sysInstance=[integer], sysInstanceofLevel=[integer], sysLevel=[integer], sysInstanceofCircIfIndex=[integer], circIndex=[integer], circIfIndex=[integer], lspSizeSupport=[integer], pduLspId=[opaque])

The length of the PDU to be sent is greater than the MTU of the interface.

Attribute

Alarm ID	Alarm Severity	Alarm Type
1.3.6.1.3.37.2.0.14	Warning	environmentalAlarm(6)

Parameters

Name	Meaning
oid	Indicates the MIB object ID of the alarm.
sysInstance	IS-IS process ID
sysInstanceofLevel	IS-IS process ID
sysLevel	IS-IS level: 1: Level-1 2: Level-2
sysInstanceofCircIfIndex	IS-IS process ID
circIndex	Interface index
circIfIndex	IS-IS interface index
lspSizeSupport	Maximum LSP length
pduLspId	LSP ID

Impact on the System

None.

Possible Causes

The LSP to be forwarded exceeds the interface MTU.

Procedure

Run the display ip interface interface-type interface-number command to view the interface MTU. The Maximum Transmit Unit in the command output shows the MTU value.
Run the display current-configuration configuration isis command to view the maximum LSP length. lsp-length originate in the command output shows the maximum LSP length. If the command output does not show a setting, the default value is used. The default maximum LSP is 1497 bytes.
Run the lsp-length originate command in the IS-IS view to change the maximum LSP length to a value smaller than the interface MTU.
Check whether the alarm is cleared.
- If the alarm is cleared, go to Step 6.
- If the alarm persists, go to Step 5.
Collect alarm information and configuration information, and then contact technical support personnel.
End.

Related Information

None.