System information

Troubleshooting AppleTalk
Book Title
9-188
Table 9-2 AppleTalk: Users Cannot Access Zones or Services
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” later in this chapter.
Duplicate network
numbers or overlapping
cable-range
In AppleTalk, network numbers must be unique within an internetwork. If duplicate
network numbers exist, packets might not be routed to their intended destinations.
If AppleTalk services do not appear in the Chooser for particular networks, those
networks probably have duplicate network numbers.
Step 1 Change the network number or cable-range of the suspect network to a
unique value using the appletalk cable-range interface configuration
command.
Step 2 Use the show appletalk route privileged exec command to view the routing
table. If the network number or cable-range continues to appear in routing
tables, you have found the duplicate (because the other network using that
number will continue to send routing updates).
If the network number or cable-range disappears from the internetwork after
40 seconds, you have not found the duplicate. Change the network number
or cable-range specification back to its previous value and try again to isolate
the duplicate network number.
Step 3 If you changed the network number or cable-range on the interface,
remember to reenter the zone name and any other interface configurations
for AppleTalk on that interface.