[c-nsp] SOLVED: BGP advert problem...

[Chris Hale]

It was the outbound upstream as-path access-list, it wasn't allowing
customers with prepends to be advertised.

It needed to be ^(27498_)+$ to allow for prepends.

Thanks to Oliver for the answer!

Chris

-----Original Message-----
From: Tony Varriale [mailto:tvarriale at comcast.net] 
Sent: Tuesday, November 21, 2006 12:27 PM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] BGP advert problem...

If I understand correclty, you are receiving 67.110.152.0/24 from one peer 
and trying to advertise it to another.

Could you do:

sh ip bgp reg $^
sh ip bgp reg ^27498$

tv
----- Original Message ----- 
From: "Chris Hale" <chris-lists at pipelinewireless.us>
To: <cisco-nsp at puck.nether.net>
Sent: Tuesday, November 21, 2006 9:31 AM
Subject: [c-nsp] BGP advert problem...


> All -
>
> I'm having an issue with a new customer's BGP advertisement.  I'm 
> receiveing
> their advert w/o issue, but for whatever reason, my 7206 won't advert to 
> my
> upstreams.  I have about 12 BGP peers on this router with no problems, but
> for whatever reason, this ONE route won't advertise.  The neighbor in
> question is 67.111.165.34, AS27498, advertising 67.110.152.0/24 to us.
>
> hancock-core1#show ip route 67.110.152.0
> Routing entry for 67.110.152.0/24
>  Known via "bgp 32623", distance 20, metric 0
>  Tag 27498, type external
>  Last update from 67.111.165.34 3d18h ago
>  Routing Descriptor Blocks:
>  * 67.111.165.34, from 67.111.165.34, 3d18h ago
>      Route metric is 0, traffic share count is 1
>      AS Hops 4
>      Route tag 27498
>
> hancock-core1#show ip bgp 67.110.152.0
> BGP routing table entry for 67.110.152.0/24, version 34364598
> Paths: (3 available, best #2, table Default-IP-Routing-Table)
>  Advertised to update-groups:
>     1          5
>  14985 3356 2828 27498
>    216.57.129.81 from 216.57.129.81 (216.57.128.227)
>      Origin IGP, localpref 110, valid, external
>      Community: 3356:3 3356:22 3356:86 3356:575 3356:666 3356:2006
> 14985:1328
>  27498 27498 27498 27498
>    67.111.165.34 from 67.111.165.34 (67.110.152.1)
>      Origin IGP, metric 0, localpref 150, valid, external, best
>  701 2828 27498
>    65.194.77.145 from 65.194.77.145 (137.39.7.197)
>      Origin IGP, localpref 100, valid, external
>
> neighbor ctransit-pg peer-group
> neighbor ctransit-pg version 4
> neighbor ctransit-pg route-map standardout out
> neighbor ctransit-pg filter-list 3 out
>
> ip as-path access-list 3 permit $^
> ip as-path access-list 3 permit ^27498$
> ip as-path access-list 3 deny .*
>
> route-map standardout permit 10
> match ip address prefix-list RAP-234552:AS27498
>
> ip prefix-list RAP-234552:AS27498 seq 10 permit 67.110.152.0/24 le 32
>
> 216.57.129.81 is one of our upstream peers - no advertisement of
> 67.110.152.0/24???
>
> hancock-core1#show ip bgp neighbors 216.57.129.81 advertised-routes
> BGP table version is 35954040, local router ID is 216.57.90.81
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal,
>              r RIB-failure, S Stale
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
>   Network          Next Hop            Metric LocPrf Weight Path
> *> 63.116.222.0/23  216.57.90.66             0         32768 i
> *> 65.215.74.0/24   216.57.89.2              0    150      0 14099 i
> *> 67.111.165.0/24  0.0.0.0                  0         32768 i
> *> 72.5.24.0/23     216.57.89.62             0    150      0 30537 i
> *> 72.46.160.0/20   0.0.0.0                  0         32768 i
> *> 72.46.168.0/24   216.57.82.6              0    150      0 36129 i
> *> 155.212.207.0/24 67.111.165.42            0    150      0 26684 i
> *> 198.112.75.0     216.57.91.18             0    150      0 31817 i
> *> 208.253.178.0/23 216.57.90.66             0         32768 i
> *> 216.57.82.0/23   216.57.90.66             0         32768 i
> *> 216.57.88.0/21   216.57.90.66             0         32768 i
> *> 216.57.94.0      216.57.89.2              0    150      0 14099 i
>
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