ISIS/2/ISIS_VERSION_SKEW
Message
ISIS/2/ISIS_VERSION_SKEW: IS-IS received a PDU with incorrect ProtocolVersion. (isisSysInstance=[isisSysInstance], isisSysLevelIndex=[isisSysLevelIndex], isisCircIndex=[isisCircIndex], isisCircIfIndex=[isisCircIfIndex], isisPduProtocolVersion=[isisPduProtocolVersion], isisPduFragment=[isisPduFragment], ifIndex=[ifIndex], IfName=[IfName])
Description
IS-IS received a Hello packet with the IS-IS version number not supported by the local .
Parameters
| Parameter Name | Parameter Meaning |
|---|---|
[isisSysInstance] |
ID of an IS-IS process |
[isisSysLevelIndex] |
IS-IS level |
[isisCircIndex] |
Circuit index 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 |
Possible Causes
Cause 1: The number of the IS-IS version supported by the local was different from that supported by another .
Cause 2: The value of the version number field was changed during the packet transmission.
Procedure
- 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 . Check whether the value of
the isisPduProtocolVersion field is 1.
If so, go to Step 2.
If not, go to Step 4.
Table 47-6 Methods of identifying system IDs and types of IS-IS packetsIdentifying the Packet Type
Identifying the System ID
Hello: A Hello packet is identified when the 5th byte in the isisPduFragment field is 0f, 10, or 11.
The six consecutive bytes beginning with the 10th byte in the isisPduFragment field constitute a System ID.
LSP: An LSP is identified when the 5th byte in the isisPduFragment field is 12 or 14.
The six consecutive bytes beginning with the 13th byte in the isisPduFragment field constitute a System ID.
SNP: An SNP is identified when the 5th byte in the isisPduFragment field is 18, 19, 20, or 21.
The six consecutive bytes beginning with the 11th byte in the isisPduFragment field constitute a System ID.
- Check the logs and ping packets to determine whether a
hardware fault causes the packets
to be changed.
If so, go to Step 3.
If not, go to Step 6.
- Check whether the IS-IS version number on the source can
be changed.
If so, go to Step 5.
If not, go to Step 6.
- Change the IS-IS version number of the source (The IS-IS
version number cannot be changed on the Huawei ). Check whether the
fault is rectified.
If so, go to Step 7.
If not, go to Step 6.
- Contact technical support personnel technical support personnel.
- End.
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