Information Technology Reference
In-Depth Information
Table9-1
AppleTalk Enhanced IGRP: Routers Not Establishing Neighbors (continued)
Possible Problem
Solution
Timer values are mismatched
1.
Use the
show appletalk eigrp neighbors exec
command. Make sure that all directly connected
AppleTalk Enhanced IGRP routers appear in the
output.
2.
Examine the uptime field in the
show appletalk
eigrp neighbors
output. A continuously
resetting uptime counter indicates that hello
packets from the neighboring router are arriving
sporadically. This might be caused by a timer
value mismatch or by hardware problems.
3.
Use the
show interface exec
command to
determine whether the interface and line
protocol are up. Look for high numbers in the
queue fields and excessive drop counts. The
queue fields displays the maximum size of the
queue and the number of packets dropped due to
a full queue.
If there are many drops, if the queue count is high, or
if the interface or line protocol is down, there is
probably something wrong with the interface or
other hardware. For more information on
troubleshooting hardware, see Chapter
3,“Troubleshooting Hardware and Booting
Problems,” and Chapter 15, “Troubleshooting Serial
Line Problems.”
Use the
show running-config privileged exec
command on all AppleTalk Enhanced IGRP
routers in the network. Look for
appletalk
eigrp-timers
interface configuration command
entries. The values configured by this command
must be the same for all AppleTalk Enhanced
IGRP routers on the network.
4.
Timer values are mismatched
(continued)
5.
If any routers have conflicting timer values,
reconfigure them to conform with the rest of the
routers on the network. These values can be
returned to their defaults with the
no appletalk
eigrp-timers
interface configuration command.
Older version of the
Cisco IOS software
If problems persist, upgrade to the latest release of
the Cisco IOS software.
AppleTalk Enhanced IGRP: Routes Missing from Routing Table
Symptom:
Routes are missing from the routing table of routers running AppleTalk Enhanced IGRP.
Clients (Macintosh computers) on one network cannot access servers on a different network. Clients
might or might not be able to connect to servers on the same network. The problem might occur in
internetworks running only Enhanced IGRP or in an internetwork running Enhanced IGRP and RTMP.
