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How to Update BGP Neighbor new IP prefixes

Hi Guys,

I'm having an issues to update my bgp neighbor new IP prefixes.

I received an email from the peering neighbor,

Their AS path is announcing a new set of prefixes,

103.14.28.0/24

103.14.29.0/24

But when I running the command below, two of the new prefixes is not update to my list yet.

abc#show ip bgp neighbors 218.100.44.140 received-routes

BGP table version is 204631407, local router ID is 218.100.44.116

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

              r RIB-failure, S Stale, m multipath, b backup-path, x best-externa                                                                             l

Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path

*> 42.0.28.0/24     218.100.44.140                         0 38182 i

*> 42.0.29.0/24     218.100.44.140                         0 38182 i

*> 42.0.30.0/23     218.100.44.140                         0 38182 56140 i

*> 103.6.236.0/24   218.100.44.140                         0 38182 132197 i

*> 103.6.237.0/24   218.100.44.140                         0 38182 132197 i

*> 103.6.238.0/24   218.100.44.140                         0 38182 132197 i

*> 103.6.239.0/24   218.100.44.140                         0 38182 132197 i

*> 103.8.24.0/24    218.100.44.140                         0 38182 132241 i

*> 103.8.25.0/24    218.100.44.140                         0 38182 132241 i

*> 103.8.26.0/24    218.100.44.140                         0 38182 132241 i

*> 103.8.27.0/24    218.100.44.140                         0 38182 132241 i

*> 113.11.190.0/24  218.100.44.140                         0 38182 55950 e

*> 113.11.191.0/24  218.100.44.140                         0 38182 55950 e

*> 113.23.134.0/24  218.100.44.140          20             0 38182 i

What should I do to update the new announcing prefixes??

Hope someone experts can advice me on this.

Really appreciate it.

Thanks.

Everyone's tags (2)
5 REPLIES

How to Update BGP Neighbor new IP prefixes

They should show up in your table when you receive them. Did they specify a date that they'd start advertising them? Unless you have route filtering configured for the neighbor, you should just receive them.

HTH,

John

* Please rate all helpful posts *

HTH, John *** Please rate all useful posts ***
New Member

How to Update BGP Neighbor new IP prefixes

Hi j.blaklet,

Thanks for your information.

I believe my router doesn't have route filtering configured for the neighbor,

This is my below configuration,

neighbor 218.100.44.140 remote-as 38182

address-family ipv4

  neighbor 218.100.44.140 activate

  neighbor 218.100.44.140 soft-reconfiguration inbound

  neighbor 218.100.44.140 prefix-list as-mnc out

Need your help to advice on this issue.

Thanks.

How to Update BGP Neighbor new IP prefixes

I don't see anything in your current configuration that would lead me to believe you're disallowing those routes in. Maybe you should contact the neighbor to see if they're advertising those to you. It's also possible that they have an outbound filter as well and haven't allowed those prefixes to be advertised to you.

HTH,

John

HTH, John *** Please rate all useful posts ***
New Member

How to Update BGP Neighbor new IP prefixes

Hi, let me check with the neighbor...

In this case, just to check with you, do I need to do clear ip bgp neighbor to update the prefixes?

Thanks.

Re: How to Update BGP Neighbor new IP prefixes

No you shouldn't need to do anything on your end.

Hth,

John

Sent from Cisco Technical Support iPad App

HTH, John *** Please rate all useful posts ***
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