[c-nsp] BGP Community Problem (I think)

Olof Kasselstrand olof.kasselstrand at gmail.com
Wed Nov 18 08:32:21 EST 2009


Hi,

Are you using soft-reconfigure on the routers? That will cause this
kind of behavior.

// Olof

On Wed, Nov 18, 2009 at 8:05 AM, Ben Steele <illcritikz at gmail.com> wrote:
> As Hobbs mentioned do a "sh ip bgp neighbor <your bgp peer>" and look for
> the prefix activity part which will tell you about prefixes that didn't get
> sent to that peer for various reasons.
>
> Have you looked at the communities attached to the prefixes you have learnt
> from your other peer that you aren't advertising?, do they have either
> no-advertise/no-export/local-as etc. on them? is the peer your receiving the
> feed from iBGP or eBGP? and is the peer your sending them to iBGP or eBGP?
>
>
> On Wed, Nov 18, 2009 at 5:40 PM, Skeeve Stevens <Skeeve at eintellego.net>wrote:
>
>> But, the router isn't even sending them to the next router... between
>> tagging them and re-sending them, they just aren't there.... so I would
>> assume the neighbour they are being sent to is nothing to do with it?
>>
>> ...Skeeve
>>
>> --
>> Skeeve Stevens, CEO/Technical Director
>> eintellego Pty Ltd - The Networking Specialists
>> skeeve at eintellego.net / www.eintellego.net
>> Phone: 1300 753 383, Fax: (+612) 8572 9954
>> Cell +61 (0)414 753 383 / skype://skeeve
>> www.linkedin.com/in/skeeve ; facebook.com/eintellego
>> --
>> NOC, NOC, who's there?
>>
>>
>> >
>> > Not sure off-hand, but you can do show ip bgp neighbor and far down in
>> > the
>> > output you will see a section showing stats about why prefixes were
>> > dropped
>> > (route-map, dist-list, etc). What does it say?
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