System information

Troubleshooting ISO CLNS
Book Title
12-276
ES host is not running
ES-IS
5
protocol
Step 1 Use the appropriate host commands to verify that an ES-IS process is running. If
necessary, initiate the ES-IS process on the host.
Step 2 Check the adjacency database on the host and verify that it has an entry for its
directly connected router.
Step 3 Use the debug clns packet privileged exec command on the Level 1 router to
verify that it sees and forwards packets from the ES.
Caution: Because debugging output is assigned high priority in the CPU process,
it can render the system unusable. For this reason, use debug commands only to
troubleshoot specific problems or during troubleshooting sessions with Cisco
technical support staff. Moreover, it is best to use debug commands during periods
of lower network traffic and fewer users. Debugging during these periods decreases
the likelihood that increased debug command processing overhead will affect
system use.
Step 4 If necessary, statically configure the router to recognize the ES by using the clns
es-neighbor interface configuration command. The following is the syntax for the
clns es-neighbor command:
clns es-neighbor nsap snpa
Syntax Description:
• nsap—Specific NSAP to map to a specific MAC
6
address.
• snpa—Data link (MAC) address.
Example:
The following example defines an ES neighbor on Ethernet interface 0:
interface ethernet 0
clns es-neighbor 47.0004.004D.0055.0000.0C00.A45B.00
0000.0C00.A45B
In this case, the end systems with the following NSAP, or NET
7
, are configured
with an Ethernet MAC address of 0000.0C00.A45B:
• 47.0004.004D.0055.0000.0C00.A45B.00
Possible Problem Solution