ISIS/3/ISIS_AREA_MISMATCH
Message
ISIS/3/ISIS_AREA_MISMATCH: IS-IS received a level-1 Hello PDU whose area address is different from the local area address. (isisSysInstance=[isisSysInstance], isisSysLevelIndex=[isisSysLevelIndex], isisCircIndex=[isisCircIndex], isisCircIfIndex=[isisCircIfIndex], isisPduFragment=[isisPduFragment], ifIndex=[ifIndex], IfName=[IfName])
Description
The area address contained in a received Level-1 Hello message is different from any local Level-1 area address.
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 |
[isisPduFragment] |
64-byte PDU header |
[ifIndex] |
IfIndex of an interface |
[IfName] |
Interface name |
Procedure
- Based on the IS-IS packet format defined in ISO10589, check
the isisPduFragment field (in hexadecimal) and obtain the system
ID of the source . Run the display this command in the IS-IS view
of the source to check whether the source is configured with an
area address the same as that of the local .
If the source and the local have the same area address, go to Step 3.
If the source and the local have different area addresses, go to Step 2.
Table 47-1 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.
- Run the network-entity command in the IS-IS view of the
source to configure an IS-IS area address the same as that of the
local . Exercise caution when using the undo network-entity command. Then, check whether the fault is rectified.
If the fault rectified, go to Step 4.
If the fault persists, go to Step 3.
- Contact technical support personnel technical support personnel.
- End.
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