BGP route filter

[mohammed asif suleman]

Hi,

i am trying to filter the inbound routes from ISP , but ended up blocking all routes from ISP.

please can anyone advise..

the topology is like below

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ip prefix-list PL_IN seq 5 10.13.1.26/29

router bgp 65000
neighbor 172.16.16.1 prefix-list seq 5 permit PL_IN in

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i want the only route from PE router to be displayed in CE routing table is 10.13.1.26 

and the same way how to restrict the outbound routes , the only route to be sent is 10.5.11.76 to PE router.

[Richard Burts]

There are several issues with the syntax that you have used.

- in the prefix list you give it a name, a seq number, and a network. But you fail to say permit

- when you apply it to the neighbor you should use the prefix list name and not the text of the prefix list entry.

HTH

Rick

[mohammed asif suleman]

oopss..i typed it wrong here,

it is 

ip prefix-list PL_IN seq 5 permit 10.13.1.26/29

router bgp 65000

neighbor 172.16.16.1 prefix-list PL_IN in

[Akash Agrawal · Accepted solution]

Hi,

configuration looks ok. Only thing to be checked that you have prefix with mask /29 only. Please share output of "show ip bgp 10.13.1.26/29 from 172.16.16.1 and 172.16.16.2

Regards,

Akash

[mohammed asif suleman]

Thank you Akash...

the mask was /25. i needed only 2 routes so i gave mask as /29, thats what made it denying all routes.

thank you once again