System information

Troubleshooting ISO CLNS 12-285
ISO CLNS: Redistribution Causes Routing Problems
Missing or misconfigured
default-metric command
Step 1 Use the show running-config exec command to view the router configuration.
Look for a default-metric router configuration command entry.
Step 2 If the default-metric router configuration command or the distance router
configuration command is missing, add the appropriate version of the missing
command.
Syntax:
The following is the syntax for the default-metric command:
default-metric number
Syntax Description:
• number—Default metric value appropriate for the specified routing protocol.
Syntax:
The following is the syntax for the distance command:
distance value [clns]
Syntax Description:
• value—Administrative distance, indicating the trustworthiness of a routing
information source. This argument has a numeric value between 0 and 255. A
higher relative value indicates a lower trustworthiness rating. Preference is
given to routes with smaller values. The default, if unspecified, is 110.
• clns—(Optional) CLNS-derived routes for IS-IS.
Refer to the Cisco IOS Network Protocols Configuration Guide, Part 2 and Network
Protocols Command Reference, Part 2 for information about adjusting ISO CLNS
default metrics.
Missing or misconfigured
distance command
Step 1 Use the show running-config exec command to view the router configuration.
Look for a distance router configuration command entry.
Step 2 If the distance command is missing, configure a distance specification on the
router. Use the distance router configuration command to configure the
administrative distance for CLNS routes learned.
Syntax:
The following is the syntax for the distance command:
distance value [clns]
Syntax Description:
• value—Administrative distance, indicating the trustworthiness of a routing
information source. This argument has a numeric value between 0 and 255. A
higher relative value indicates a lower trustworthiness rating. Preference is
given to routes with smaller values. The default, if unspecified, is 110.
• clns—(Optional) CLNS-derived routes for IS-IS.
Example:
In the following example, the distance value for CLNS routes learned is 90.
Preference is given to these CLNS routes rather than routes with the default
administrative distance value of 110:
router isis
distance 90 clns
Possible Problem Solution