System information

Troubleshooting AppleTalk 9-191
AppleTalk: Zones Missing from Chooser
As shown in Table 9-3, Forward Request packets do not exist in Phase 1. Only Phase 2 routers know
what to do with them. Phase 1 routers that receive Forward Request packets simply drop them.
AppleTalk: Zones Missing from Chooser
Symptom: Certain zones do not appear in the Chooser. The zones are not visible from multiple
networks. In some cases, when the Chooser is opened, the zone list changes.
Table 9-4 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table 9-4 AppleTalk: Zones Missing from Chooser
Possible Problems Solution
Configuration mismatch
Step 1 Use the show appletalk interface exec command. Check the output for a
“port configuration mismatch” message.
If the command output contains a “mismatch” message, the router
configuration disagrees with that of the listed neighbor.
If the command output does not include the “mismatch” message, use the
clear apple interface privileged exec command on the interface in
question. If the interface becomes operational after clearing, a
configuration mismatch does not exist.
Step 2 Enter the show appletalk interface exec command again. If its output
still contains a “port configuration mismatch” message, check whether all
router configurations agree on the network number or cable range and the
zone or zone list.
Step 3 If router configurations disagree on these parameters, alter router
configurations to bring all routers into alignment.
Step 4 If problems persist, put the problem router in discovery mode by
specifying the interface configuration command appletalk address 0.0
on a nonextended network or the appletalk cable-range 0-0 command on
an extended network. This causes the router to get its configuration
information from the network.
For more information about configuration mismatches, see the section “AppleTalk
Configuration Mismatches” earlier in this chapter.
Misconfigured access lists
or other filters
Step 1 Use the show appletalk access-list exec command on routers in the path
from source to destination.
Step 2 Disable any access lists (or just those on a particularly suspect router)
using the no appletalk access-group interface configuration command. If
there are distribution lists or other filters configured, disable them.
Step 3 After disabling access lists, check whether remote zones and services
become accessible.
Step 4 If zones and services are now available, a misconfigured access list is the
likely problem. To isolate the problem access list, enable lists one at a
time until connectivity fails.
Step 5 Check the access lists and associated configuration commands for errors.
Configure explicit permit statements for traffic that you want to pass
through the router normally.
Step 6 If problems persist, there might be more than one misconfigured access
list. Continue enabling access lists one at a time and fixing misconfigured
access lists until the problem is solved.