[nsp] Rip route does not appear

From: kouji.baba@equant.com
Date: Mon Mar 11 2002 - 03:12:44 EST


I have following configuration.

+---+ 172.16.255.0/24 +---+ 192.168.128.0/24 +---+
| R1+----<Bridged WAN>----+ R2+---------+--------+ R3+---+
+-+-+.1 .3+-+-+.251 | .252+---+ |192.168.120.0/24
  |.1 192.168.253.0/24 |.3 | +---+ |
  +------<ISDN backup>------+ +--------+ R4+---+
                                             .253+---+
(each IOS=12.1(2))

R2 has configuration like this.

interface Ethernet0/0
 ip address 172.16.255.3 255.255.255.0
!
interface Ethernet0/1
 ip address 192.168.128.251 255.255.255.0
!
interface BRI 1/0
 ip address 192.168.253.3 255.255.255.0
 <several dialer configuration>
!
router rip
 redistribute static
 network 172.16.0.0
 network 192.168.128.0
!
ip route 0.0.0.0 0.0.0.0 192.168.253.1 200
ip route 172.16.0.0 0.0.255.255 0.0.0.0
!

Normally, it receives 0.0.0.0 route by RIP from 172.16.255.1.
And R3 and R4 receives 172.16.0.0/16(auto summarized) from R2.

When Ethernet0/0 protocol goes down, 172.16.0.0/16 is not appear even
ISDN backup connection established.
But, once I add a 24bit prefix network as static route, for example,
ip route 172.16.25.0 0.0.0.255 0.0.0.0
R3 and R4 gets route 172.16.0.0/16.

Is it bug of IOS?

-----
Kouji Baba



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