03-09-2004 12:03 AM - edited 03-02-2019 02:08 PM
A router (R-1601) receives a default route via RIP from a L3 switch (C-6500).
R-1601 is also configured to generate a default route (default-information originate).
When everything is working fine (normal operation), the following can be seen from R-1601:
***********************************************************
Gateway of last resort is X.X.X.252 to network 0.0.0.0
<other info removed>
R* 0.0.0.0/0 [120/4] via X.X.X.252, 00:00:04, Ethernet0
[120/4] via X.X.X.253, 00:00:17, Ethernet0
[120/4] via Y.Y.Y.252, 00:00:04, Ethernet0
[120/4] via Y.Y.Y.253, 00:00:17, Ethernet0
***********************************************************
Both R-1601 and C-6500 are on the same building.
After a power failure, the following can be seen from R-1601:
***********************************************************
Gateway of last resort is not set
<other info removed>
R* 0.0.0.0/0 is possibly down, routing via Y.Y.Y.252, Ethernet0
***********************************************************
<R-1601 config>
!
interface Ethernet0
ip address Y.Y.Y.251 255.255.240.0 secondary
ip address X.X.X.251 255.255.255.0
!
router rip
version 2
redistribute static metric 4
passive-interface BRI0
network Y.Y.0.0
network X.X.0.0
default-information originate
!
no ip http server
ip classless
ip route Z.Z.0.0 255.255.0.0 BRI0 X.X.X.253 150
!
Is this normal? Because even after the C-6500 has finished booting up,
the route is still down. I was thinking that the routing table of R-1601
should be updated once it receives the default route from the C-6500.
I've used the following documents as my reference:
http://www.cisco.com/en/US/tech/tk365/tk554/technologies_tech_note09186a0080094374.shtml
Any helpful input is greatly appreciated.
Ariel
03-09-2004 12:27 AM
Hello,
after rebooting the 1601 issue the command:
debug ip rip
and
debug ip routing
Since RIP is usually slow converging, it might take a while. Or try to issue the command:
clear ip route *
on the 1601. Also, can you post the config of your 6500 as well ?
Regards,
GP
03-09-2004 01:05 AM
First of all, thanks for your interest in this post, GP.
I'm afraid I can't reboot or debug the 1601 right now. Actually, the router was
already rebooted by our customer and I can say it's back to normal. I also thought
that clearing the routing table might resolve the issue. But we cannot do this
everytime a problem (power outage, link failure, etc.) occurs.
The 1601 router replaced another router. The previous router was a 7200.
I compared the old and new configs and I think one line was mistakenly erased.
ip route 0.0.0.0 0.0.0.0 X.X.X.254 200
The static route above was missing from the new config.
I'm thinking if this route has something to do with the problem.
I'd like to try adding it to the 1601 but still I won't be able to perform the test
on a live network.
Here's the 6500 config:
!
interface Vlan10
ip address Y.Y.Y.253 255.255.240.0 secondary
ip address X.X.X.253 255.255.255.0
no ip redirects
no ip unreachables
ip rip send version 2
ip rip receive version 2
standby 10 ip Y.Y.Y.254
standby 10 preempt
standby 20 ip X.X.X.254
standby 20 preempt
!
!
router rip
version 2
redistribute static metric 2
network A.A.0.0
network B.B.0.0
network C.C.0.0
network Y.Y.0.0
network X.X.0.0
distribute-list 10 out Vlan10
no auto-summary
!
No static default route is configured on this switch because the default
route/information is coming from another L3 switch.
Thanks again,
Ariel
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