How to automatically remove invalid injected route?

[sydflyer2011]

Hi Guys,

I have a question in regards to route redistriubtion. For example:

Router A has enabled BGP and EIGRP, and its EIGRP neighbour is Router B. Now Router A redistriubte BGP learned route to EIGRP process, Say, one of the BGP learned route is called Redistribute_BGP. Then, Router B learned the Redistribute_BGP from EIGRP and put it into its routing protocol.

OK, now, Router A's BGP session is broken and lost its BGP learned routes. However, Router B still has the Redistribute_BGP in its routing table. My question is how to get this Redistribute_BGP route removed from Router B's routing table after Router A lose its BGP routes.  Is there any "trigger"? or workarounds? Thanks.

Regards,

Alex

[paolo bevilacqua]

is that a theoretical question? That is not normal. The route should be withdrawn at the time BGP session is down.

[sydflyer2011]

Hi Paolo,

Thanks for your answer. I think you are right. Eventually I've seen the route is withdrawn but just way too late to see it happening on Router B as soon as BGP session is down.

[paolo bevilacqua]

You're welcome. Please remember to rate useful posts clicking on the stars below.

[r.malviya]

Like it should be removed route from eigrp routing table .........wait till the eigrp flush time .

afterthat it will definatly remove the route .

i have one question ?

R u creating the this topology in GNS ? if yes then might be changes becasue it behave some time very weird .

do u r getting all the prefix from ISP or default route .

if only default route then check in your config is there any command u config like

default information originate

Regards

Ritesh