[c-nsp] BGP doesn't advertise prefixes

Sandor Rozsa rozsa.sandor.gyula at gmail.com
Wed Apr 29 08:40:56 EDT 2015


I assume you haven't enabled auto summary for the BGP. In this case based
on what you've written, the announcement of your 123.0.73.0/24 should have
the correct mask in the bgp network statement.

>>> network 123.0.73.0 mask 255.255.255.0 route-map EQX-BGP-Originate


!Static route

ip route 123.0.73.0 255.255.255.0 Null0 250

On Wed, Apr 29, 2015 at 5:17 AM, Samol <molasian at gmail.com> wrote:

>  here it is the config:
>
> !Route-map
>
> route-map EQUINIX-TRANSIT-OUT permit 5
>  match ip address prefix-list CP-M21-PREPEND
>  set as-path prepend 123 123 123
> !
> route-map EQUINIX-TRANSIT-OUT permit 10
>  match community 500
>
> route-map EQX-BGP-Originate permit 10
>  set community 123:123 65501:24115 additive
>
> !Prefix-list
> !
> ip prefix-list CP-M21-PREPEND seq 5 permit 123.0.73.0/24
>
> !Community list
>
> ip community-list 500 permit 123:123
>
>
> !BGP protocol
>
> router bgp 123
>  neighbor EQUINIX-TRANSIT peer-group
>  neighbor EQUINIX-TRANSIT remote-as 17819
>  neighbor EQUINIX-TRANSIT update-source Vlan105
>  neighbor 27.111.241.123 peer-group EQUINIX-TRANSIT
>
> address-family ipv4
>   neighbor EQUINIX-TRANSIT send-community
>   neighbor EQUINIX-TRANSIT prefix-list BOGON in
>   neighbor EQUINIX-TRANSIT route-map EQUINIX-TRANSIT-OUT out
>   neighbor EQUINIX-TRANSIT maximum-prefix 600000 95
>   neighbor 27.111.241.123 activate
>
>   network 123.0.73.0 route-map EQX-BGP-Originate
>
>
> !Static route
>
> ip route 123.0.73.0 255.255.255.0 Null0 250
>
>
> using show ip bgp route-map EQUINIX-TRANSIT-OUT result that rule match what
> we want, but it doesn't advertise out !
>
> Regards,
>
> 2015-04-28 19:35 GMT+07:00 Scott Granados <scott at granados-llc.net>:
>
> > It could be a bug but most likely a configuration issue.  The bugs on the
> > 65xx platform are normally more like the supervisor will crash when the
> BGP
> > table counter reaches a certain threshold or similar to that not just the
> > lack of advertisement to a single peer.  It’s possible but if you could
> > post the relevant portions of your on fig that would probably yield
> better
> > results.
> >
> > Thanks
> >
> >
> > On Apr 28, 2015, at 5:59 AM, Samol <molasian at gmail.com> wrote:
> >
> > > Hi All,
> > >
> > > Weird issue of BGP running on:
> > >
> > > Cisco IOS Software, s72033_rp Software (s72033_rp-IPSERVICESK9_WAN-M),
> > > Version 12.2(33)SXJ2, RELEASE SOFTWARE (fc4)
> > >
> > > cisco WS-C6503-E (R7000) processor (revision 1.3) with 983008K/65536K
> > bytes
> > > of memory.
> > >
> > > We did the configuration correctly and we applied on different peers.
> > other
> > > peers are advertising routes, but on peer is not. using "sh ip bgp
> > > route-map X" , we can see that route-map is matching what we want,
> > however,
> > > " show ip bgp neighbors 1.2.3.4 advertised-routes " gives only one
> prefix
> > > advertise out, and sometimes it doesn't advertise out either.
> > >
> > > Is there any known bug on this or anything else should I check ?
> > >
> > > Regards.
> > >
> > > --
> > > Samol Khoeurn
> > > (855) 077 55 64 02 / (855) 070 52 53 46
> > > Network Engineer
> > > Cisco: CCNA/CCNP SP/CCIP/
> > > Juniper: JNCIA/JTNOC/JNCIS-ENT,SP,SEC/JNCIP-ENT,SP
> > > Blog: http://thesaltedegg.net
> > > www.linkedin.com/in/samolkhoeurn
> > > _______________________________________________
> > > cisco-nsp mailing list  cisco-nsp at puck.nether.net
> > > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > > archive at http://puck.nether.net/pipermail/cisco-nsp/
> >
> >
>
>
> --
> Samol Khoeurn
> (855) 077 55 64 02 / (855) 070 52 53 46
> Network Engineer
> Cisco: CCNA/CCNP SP/CCIP/
> Juniper: JNCIA/JTNOC/JNCIS-ENT,SP,SEC/JNCIP-ENT,SP
> Blog: http://thesaltedegg.net
> www.linkedin.com/in/samolkhoeurn
> _______________________________________________
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