System information

Troubleshooting TCP/IP
Book Title
7-130
IP Enhanced IGRP: Router Stuck in Active Mode
Symptom: An IP Enhanced IGRP router is stuck in Active mode. Multiple “Stuck-in-Active”
messages are sent to the console:
%DUAL-3-SIA: Route 198.169.52.51 Stuck-in-Active
For a more detailed explanation of Enhanced IGRP Active mode, see the section “Enhanced IGRP
and Active/Passive Modes” later in this chapter.
Note Occasional messages of this type are not a cause for concern. This is how an Enhanced IGRP
router recovers if it does not receive replies to its queries from all its neighbors. However, if these
error messages occur frequently, you should investigate the problem.
Table 7-15 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table 7-15 IP Enhanced IGRP: Router Stuck in Active Mode
Hello interval or
hold-time value
mismatch
Step 1 Use the show running-config privileged exec command on all routers in
the network.
Step 2 Look for ip hello-interval eigrp and ip hold-time eigrp interface
configuration command entries.
The values configured by these commands should be the same for all IP
routers on the network. At minimum, backbone routers should be
configured with the same hello interval and hold-time values.
Step 3 If there are routers with mismatched hello interval or hold-time values,
reconfigure them to bring them into conformance with the rest of the
routers on the network.
You can return these timer values to their defaults by using the no ip
hello-interval eigrp and the no ip hold-time interval eigrp interface
configuration commands.
Default routing
metrics are incorrectly
configured
Step 1 Use the show running-config privileged exec command on suspect
routers. Look for default-metric router configuration command entries.
This command changes the default metric values assigned to redistributed
routes.
Step 2 If a default-metric statement appears in the configuration, examine the
values that it defines. Be certain that these values will reliably and
accurately translate routing metrics between the routing protocols
implemented on your network. To restore the default values for the
routing metrics, use the no default-metric router configuration command
for the appropriate routing protocol.
For more information on the IP Enhanced IGRP default-metric router
configuration command, see the Cisco IOS configuration guides.
Possible Problem Solution