ISIS_1.3.6.1.3.37.2.0.11 isisVersionSkew

Trap Buffer Description

IS-IS received a PDU with incorrect ProtocolVersion. (isisSysInstance=[isisSysInstance], isisSysLevelIndex=[isisSysLevelIndex], isisCircIndex=[isisCircIndex], isisCircIfIndex=[isisCircIfIndex], isisPduProtocolVersion=[isisPduProtocolVersion], isisPduFragment=[isisPduFragment], ifIndex=[ifIndex], IfName=[IfName])

IS-IS received a Hello packet with the IS-IS version number not supported by the local device.

Trap Attributes

Trap Attribute	Description
Alarm or Event	Event
Trap Severity	Critical
Mnemonic Code	ISIS_VERSION_SKEW
Trap OID	1.3.6.1.3.37.2.0.11
MIB	ISIS-MIB
Alarm ID	This is an event trap and does not involve alarm ID.
Alarm Name	This is an event trap and does not involve alarm name.
Alarm Type	This is an event trap and does not involve alarm type.
Raise or Clear	This is an event trap and does not involve alarm generation or clearance.
Match trap	-

Trap Buffer Parameters

Parameter	Description
isisSysInstance	ID of an IS-IS process.
isisSysLevelIndex	IS-IS level.
isisCircIndex	Circuit IfIndex of an interface.
isisCircIfIndex	Circuit IfIndex of an interface.
isisPduProtocolVersion	Version number.
isisPduFragment	64-byte PDU header.
ifIndex	IfIndex of an interface.
IfName	Interface name.

VB Parameters

VB OID	VB Name	VB Index
1.3.6.1.3.37.1.1.1.1.1	isisSysInstance	isisSysInstance
1.3.6.1.3.37.1.2.1.1.1	isisSysLevelIndex	isisSysInstance isisSysLevelIndex
1.3.6.1.3.37.1.3.1.1.2	isisCircIfIndex	isisSysInstance isisCircIndex
1.3.6.1.3.37.1.10.1.1.5	isisPduProtocolVersion	isisSysInstance
1.3.6.1.3.37.1.10.1.1.2	isisPduFragment	isisSysInstance
1.3.6.1.2.1.31.1.1.1.1	ifName	ifIndex

Impact on the System

1. If the board modifies the packet, route flapping may occur, and the CPU usage will increase.

2. If the trap is generated because of intercommunication between devices, neighbors cannot be established, and routes cannot be learnt from each other.

Procedure

1. Based on the IS-IS packet format defined in ISO10589, check the isisPduFragment field (in hexadecimal) of the binary packet and obtain the system ID of the source device. Check whether the value of the isisPduProtocolVersion field is 1.

If so, go to Step 2.
If not, go to Step 4.

2. Check the logs and ping packets to determine whether a hardware fault on the board causes the packets to be changed.

If so, go to Step 3.
If not, go to Step 6.

3. Replace the board and then check whether the fault is rectified.

If so, go to Step 7.
If not, go to Step 6.

4. Check whether the IS-IS version number on the source device can be changed.

If so, go to Step 5.
If not, go to Step 6.

5. Change the IS-IS version number of the source device (The IS-IS version number cannot be changed on the Huawei device). Check whether the fault is rectified.

If so, go to Step 7.
If not, go to Step 6.

6. Collect log information and configuration information, and then contact technical support personnel.

7. End.