80
other 4 subnet routers of S2, which are 2001:1::20:0/112, 2001:1::21:0/112, 2001:1::22:0/112,
2001:1::23:0/112. S2 supports route aggregation, and to configure aggregation route
2001:1::20:0/110 in interface vlan1 of S2, after that, sending router messages to S2 through
vlan1, and put the four subnet routers aggregated to one router as 2001:1::20:0/110, and send to
S1, and not send subnet to neighbor. It can reduce the router table of S1, save the memory.
S1 configuration list
：
Switch1(config)#router ipv6 rip
Switch1(config-router)#network vlan 1
S2 configuration list
：
Switch2(config)#router ipv6 rip
Switch2(config-router)#network vlan 1
Switch2(config-router)#exit
Switch2(config)#in vlan 1
Switch2(Config-if-Vlan1)#ipv6 rip agg 2001:1::20:0/110
1.5.5 RIPng Troubleshooting
The RIPng protocol may not be working properly due to errors such as physic connection,
configuration error when configuring and using the RIPng protocol. So users should pay
attention to the following:
first ensure the physic connection is correct and the IP Forwarding command is open
second, ensure the interface and link layer protocol are UP (use show interface command)
then initiate the RIPng protocol (use router IPv6 rip command) and configure the port (use
IPv6 router command) ,and set RIPng protocol parameter on corresponding interfaces.
After that, a RIPng protocol feature should be noticed ---the Layer 3 switch running RIPng
transmits the route updating messages every 30 seconds. A Layer 3 switch is considered
inaccessible if no route updating messages from the switch are received within 180 seconds,
then the route to the switch will remains in the route table for 120 seconds before it is deleted.
Therefore, if to delete a RIPng route, this route item is assured to be deleted from route table
after 300 seconds.
If the RIP routing problem remains unresolved, please use debug IPv6 rip command to
record the debug message in three minutes, and send them to our technical service center.
1.5.5.1 Commands for Monitor And Debug Commands
1.5.5.1.1 debug ipv6 rip
Command: debug ipv6 rip [events| nsm| packet[recv|send][detail]| all]