System information

Troubleshooting ISO CLNS 12-287
ISO CLNS: Poor Performance
Bridge or repeater
in parallel with
router
The following is sample output from the show clns neighbors detail command:
router# show clns neighbors detail
System Id SNPA Interface State Holdtime Type Protocol
000.0000.0007 aa00.0400.6408 Ethernet0 Init 291 IS ES-IS
Area Address(es): 47.0005.80FF.F500.0000.0003.0020
0000.0C00.0C35 0000.0c00.0c36 Ethernet1 Up 94 L1 IS-IS
Area Address(es): 47.0004.004D.0001 39.0001
0800.2B16.24EA aa00.0400.2d05 Ethernet0 Up 9 L1L2 IS-IS
Area Address(es): 47.0004.004D.0001
0800.2B14.060E aa00.0400.9205 Ethernet0 Up 1651 ES ES-IS
Area Address(es): 49.0040
0000.0C00.3E51 *HDLC* Serial1 Up 27 L2 IS-IS
Area Address(es): 39.0004
0000.0C00.62E6 0000.0c00.62e7 Ethernet1 Up 26 L1 IS-IS
Area Address(es): 47.0004.004D.0001
oA00.0400.2D05 aa00.0400.2d05 Ethernet0 Init 29 IS ES-IS
Area Address(es): 47.0004.004D.0001
Look for routers that are known to be on a remote network. A router listed in the
adjacency table but that is not on a directly connected network indicates a problem.
You can also look for paths to networks (or areas) on multiple interfaces.
Step 2 If you determine that there is a parallel bridge or repeater, remove the device or
configure filters that block routing updates from being learned from the device.
Route redistribution
problem
Misconfigured route redistribution can cause performance problems. For specific
troubleshooting information, see the section “ISO CLNS: Redistribution Causes Routing
Problems” earlier in this chapter.
Possible Problem Solution