3Com Switch 8800 Advanced Software V5 Configuration Guide

Troubleshooting RIP Configuration 287
[SwitchB] acl number 2000
[SwitchB-acl-basic-2000] rule deny source 192.168.4.0 0.0.0.255
[SwitchB-acl-basic-2000] rule permit
[SwitchB-acl-basic-2000] quit
[SwitchB] rip 100
[SwitchB-rip-100] filter-policy 2000 export rip 200
# Display the routing table of Switch A.
[SwitchA] display ip routing-table
Routing Tables: Public
Destinations : 11 Routes : 11
Destination/Mask Proto Pre Cost NextHop Interface
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
172.16.1.0/24 Direct 0 0 172.16.1.1 Eth1/3
172.16.1.1/32 Direct 0 0 127.0.0.1 InLoop0
172.17.1.0/24 Direct 0 0 172.17.1.1 Eth1/2
172.17.1.1/32 Direct 0 0 127.0.0.1 InLoop0
192.168.1.0/24 Direct 0 0 192.168.1.3 Vlan100
192.168.1.3/32 Direct 0 0 127.0.0.1 InLoop0
192.168.0.0/24 Direct 0 0 192.168.0.1 Vlan101
192.168.0.1/32 Direct 0 0 127.0.0.1 InLoop0
192.168.3.0/24 RIP 100 4 192.168.1.2 Vlan100
Troubleshooting RIP
Configuration
No RIP Updates Received Symptom:
No RIP updates are received when the links work well.
Analysis:
After enabling RIP, you must use the network command to enable corresponding
interfaces. Make sure no interfaces are disabled from handling RIP messages.
If the peer is configured to send multicast messages, the same should be
configured on the local end.
Solution:
■ Use the display current-configuration command to check RIP configuration
■ Use the display rip command to check whether some interface is disabled
Route Oscillation
Occurred
Symptom:
When all links work well, route oscillation occurs on the RIP network. After
displaying the routing table, you may find some routes appear and disappear in
the routing table intermittently.
Analysis: