BGP Maximum-Prefix

[Skywalker]

Hello Team,

So i intend to bring up a peering session with one of the providers who intends to send me over 120,000 Prefixes. Since am not very sure if my routers will handle such a big table, i want to configure the BGP maximum prefix so that i only "install/accept a few prefixes from this peer."
What's not clear about this configuration (seen on cisco documentation) is, if i configure "warning only" so that the peer is not dropped, will the excess prefixes be dropped or will be still be accepted but with warning messages?

Please advise.

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Regards,

[paul driver · Accepted solution]

Hello

Waring Only will NOT tear down the peering and the excess prefixes should still be advertised

[Skywalker]

Thank you Paul, so does that mean there is no way to filter out/limit the number of prefixes that should be learned from a peer?

[paul driver]

Hello

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@Skywalker wrote:

Thank you Paul, so does that mean there is no way to filter out/limit the number of prefixes that should be learned from a peer?

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You can filter that's not a problem, You could even filter prefixes before they are advertised to you but either ways you would need to know some information on what you want to filer (ip address /range, AS path/hop count, Med , regular expression etc..)  prior to doing so.

[Skywalker]

Hi Paul,

For sure, yes, i would need to know some info prior to filtering, for some reason i thought there could be away to filter or limit the number of prefixes.

Thanks.