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Silver

Redistribution problem.

Hi Experts ,

The setup is as follows.

RTRA(eigrp)-RTRB(a0)-RTRC(a0+a66)-RTR D(a66)

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RTR E

All the routers are conncected using serial links.

RTR A is running Eigrp and RTRB, RTR C and RTR D are running ospf.

10.0.0.0 /8 network is used on RTR a and RTR E whereas 172.0.0.0 /8 is used on the remaining Routers.

I am trying for redundency in this scenario.

My problem is,

172.29.140.0 / 25 network is allocated to RTR D.172.29.140.25 is allocated to ATM.

RTR D is the backup for this ATM ( VSAT connectivity).

Whenever serial link b/n RTR C and RTR D goes down , then traffic should take path through RTR E.(i.e RTR A to RTR E to reach ATM on VSAT link).

I have configured the following routes on RTR A which is running Eigrp.

ip route 172.29.140.25 255.255.255.255 172.16.17.1

ip route 172.29.140.25 255.255.255.255 10.30.0.126 120.

Where 172.16.17.1 is serial ip of RTR B and 10.30.0.126 is serial ip of RTR E.

As soon as I shutdoen the serial link of RTR C which is connecting to RTR D , we are getting ospf updates till RTR B.Where as the static route configured on the RTR A is not purging out from RTR A route table so that floating static route will come in to picture.

static routes are redistibuted on RTR A and RTR B under Eigrp (RTR A) and OSPF (RTR B).

Whenever I shutdown serila link of RTR C , ospf updates on RTR B , RTR C are not showing 172.29.140.0 subnet and statis route on RTR A is still pointing towards RTR B not to RTR D.

What could be the problem.How to achieve redundency in this case.

Any help would be appreciated.

1 REPLY
Silver

Re: Redistribution problem.

Sorry for the mistake made in the previous post.

Actually i am making serial link of RTR C is down which is connecting to RTR D , so that floating static route configured on RTR A comes into picture and traffic will be through RTR E instead of RTR B.

But as soon as i shut the serial interface of RTR C , the static on RTR A is not vanishing from routing table of RTR A.

The ouptut taken on RTR A and RTR B without shutting down the serail link of RTR C are.

RTR A#sh ip route 172.29.140.25

Routing entry for 172.29.140.0/25

Known via "static", distance 1, metric 0 (connected)

Redistributing via eigrp 15

Advertised by eigrp 15

Routing Descriptor Blocks:

* 172.16.17.121

Route metric is 0, traffic share count is 1

and

RTR B#sh ip route 172.29.140.25

Routing entry for 172.29.140.0/25

Known via "ospf 192", distance 110, metric 1954, type inter area

Redistributing via rip

Advertised by rip metric 10

Last update from 172.16.0.5 on GigabitEthernet5/2, 00:00:31 ago

Routing Descriptor Blocks:

* 172.16.0.5, from 192.168.254.16, 00:00:31 ago, via GigabitEthernet5/2

Route metric is 1954, traffic share count is 1

As soon as i make the serial link of RTR C which is connecting to RTR D , the above route to 172.29.140.25 should go off and floating static route should be prrsent in the routing table of RTR A which is not happening in this case.

Any help would be appreciated.

Thanks....

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