Information Technology Reference
In-Depth Information
Table 8-10 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table8-10
IPX Enhanced IGRP: SAP Updates Not Propagated by Router
Possible Problem
Solution
SAP filters have
been
misconfigured.
1.
Use the
show access-lists
privileged exec command on
suspect routers to see whether there are Novell IPX access
lists configured. Use the
show running-config
privileged
exec command to see whether there are SAP filters that use
any of the configured access lists. At the end of this chapter
is a list of Novell SAPs that includes the SAP description
and hex and decimal values.
2.
If SAP filters are configured, disable them by removing
ipx
input-sap-filter
and
ipx output-sap-filter
interface
configuration commands as appropriate (using the
no
version of the command).
3.
Use the
debug ipx sap
activity privileged exec command to
see whether SAP traffic is being forwarded normally. The
debug
command output shows the server name, network
number, and MAC address of SAP packets.
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.
If SAP information is being forwarded properly by the
router, a SAP filter is causing SAP updates to be dropped by
the router.
4.
continues
SAP filters have
been
misconfigured.
(continued)
5.
To isolate the problem SAP filter, re-enable filters one at a
time until SAP packets are no longer forwarded by the
router.
6.
Change the referenced access list to allow the SAP traffic
that you want to be forwarded to pass through the router.
Make sure that all necessary ports are configured with an
explicit
permit
statement.
7.
Continue enabling filters one at a time, checking to see that
SAP traffic is being forwarded properly until you have
verified that all filters are configured properly.
