Failover Connectivity in RIP v2

Unanswered Question
Apr 28th, 2008


Maymar Branch has dual connectivity(DXX & Radio). we want the Radio Link as a primary and DXX Link as a secondory & when the primary goes down the secondary takeover but the traffic goes through the DXX link because of less no. of hop counts and Radio Link treated as a secondary link, all the router & switches are running on rip version 2 protocol.



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salman-ahmad Tue, 04/29/2008 - 21:10

Hi Sam,

Thanks for your helpful response this will work on only one condition when i shutdown the DXX interface on Maymmar branch did this work only on failover condition .

I need to know one more query from you i.e

1) If i run RIP v2 on Maymmar how would i be make radio link as primary and DXX Link as secondary link.

Is there any command in RIP v2 to make primary route and secondary route. I also attached Maymmar router configs.



cisco_lad2004 Wed, 04/30/2008 - 23:12

Hi Salman

Under routing process add

router rip

offset-list 10 out 5 s0/2/0

offset-list 10 in 5 s0/2/0


access-list 10 permit x.x.x.x y.y.y.y

the above will add a metric of 5 when sending via ur backup link and 5 when receiving via backup link.

x.x.x.x is the Prefix u wish to apply this offset to.

do sh ip route before and after this to validate the changes.



salman-ahmad Fri, 05/02/2008 - 01:49

Hi Sam,

After your recomendation this was the result i found

Trace from Branch Switch to Maymmar server


Type escape sequence to abort.

Tracing the route to

1 80 msec 80 msec 48 msec

2 60 msec 56 msec 64 msec

3 92 msec * 76 msec

Trace from Maymmar to Branch Switch server


Type escape sequence to abort.

Tracing the route to

1 60 msec 48 msec 32 msec

2 88 msec * 92 msec

I want Maymmar traffic goes from radio link not secondary link.

cisco_lad2004 Fri, 05/02/2008 - 02:31

where did u make the changes I suggested ?

Please paste ur rip config and sh ip route for Branch switch and maymar server.


salman-ahmad Tue, 05/06/2008 - 01:20

Today i did this and it will work fine.

access-list 1 permit

access-list 2 permit

router rip

offset-list 1 out 4 s0/2/0

offset-list 2 in 4 s0/2/0

Well thanks for your help and time to answer in the discussion forum.



cisco_lad2004 Tue, 05/06/2008 - 01:24

Glad to help.

I have given u example and method and u found the right way to apply it to ur set up.

Well done !



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