[c-nsp] advertised-routes

[Artyom Viklenko]

Hi, All!

I have installed route-server for small exchange point.
Router is Cisco 2801, IOS c2801-ipbasek9-mz.124-24.T2.bin.

All peers connected to the same subnet on FastEthernet0/0.


Neighbor        V          AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down 
  State/PfxRcd
XXX.YYY.ZZZ.130 4      ?????    5585    5685      294    0    0 3d20h 
         5
XXX.YYY.ZZZ.131 4      ?????    1199    1299      294    0    0 19:58:14 
        2
XXX.YYY.ZZZ.132 4      ?????    1202    1304      294    0    0 19:54:41 
        2
XXX.YYY.ZZZ.133 4      ?????       0       0        0    0    0 never 
  Active
XXX.YYY.ZZZ.134 4      ?????    1197    1294      294    0    0 19:44:45 
        4
XXX.YYY.ZZZ.135 4      ?????       0       0        0    0    0 never 
  Active
XXX.YYY.ZZZ.136 4      ?????    1187    1285      294    0    0 19:42:56 
        1
XXX.YYY.ZZZ.137 4      ?????    1163    1253      294    0    0 19:18:41 
        2
XXX.YYY.ZZZ.138 4      ?????   60207    1197      294    0    0 00:17:48 
       30
XXX.YYY.ZZZ.139 4      ?????    1110    1401      294    0    0 00:34:31 
        6


All neighbors configured as a peer-group members, except firs
which is an iBGP peer in the same AS.

So, we have three update-groups:

BGP version 4 update-group 1, internal, Address Family: IPv4 Unicast
   BGP Update version : 294/0, messages 0
   4 octets ASN capable
   Community attribute sent to this neighbor
   Route map for outgoing advertisements is BGP-IX-OUT
   Update messages formatted 150, replicated 0
   Number of NLRIs in the update sent: max 22, min 0
   Minimum time between advertisement runs is 0 seconds
   Has 1 member (* indicates the members currently being sent updates):
    XXX.YYY.ZZZ.130

BGP version 4 update-group 2, external, Address Family: IPv4 Unicast
   BGP Update version : 294/0, messages 0
   Private AS number removed from updates to this neighbor
   Community attribute sent to this neighbor
   Route map for outgoing advertisements is BGP-IX-OUT
   Update messages formatted 386, replicated 181
   Number of NLRIs in the update sent: max 44, min 0
   Minimum time between advertisement runs is 30 seconds
   Has 5 members (* indicates the members currently being sent updates):
    XXX.YYY.ZZZ.132  XXX.YYY.ZZZ.133  XXX.YYY.ZZZ.134  XXX.YYY.ZZZ.135
    XXX.YYY.ZZZ.139

BGP version 4 update-group 3, external, Address Family: IPv4 Unicast
   BGP Update version : 294/0, messages 0
   4 octets ASN capable
   Private AS number removed from updates to this neighbor
   Community attribute sent to this neighbor
   Route map for outgoing advertisements is BGP-IX-OUT
   Update messages formatted 165, replicated 313
   Number of NLRIs in the update sent: max 44, min 0
   Minimum time between advertisement runs is 30 seconds
   Has 4 members (* indicates the members currently being sent updates):
    XXX.YYY.ZZZ.131  XXX.YYY.ZZZ.136  XXX.YYY.ZZZ.137  XXX.YYY.ZZZ.138

At the present all works as expected. But only thing which confuse me
is the output of 'sh ip bgp neigbor x.x.x.x adv' command.

For any neigbors from update-group 3 it shows all routes, but for
neighbors from update-group 2 only some subset -some portion of last
received updates. Also values for replicated updates also different.
But on the other end router sees all prefixes.

Can someone explain me this situation, or at least point me in right
direction, please? May be it's a bug in IOS and I need to upgrade to
advipservices?

Thanks in advance!

And Merry Christmas and Happy New Year! :)

-- 
            Sincerely yours,
                             Artyom Viklenko.
-------------------------------------------------------
artem at aws-net.org.ua | http://www.aws-net.org.ua/~artem
artem at viklenko.net   | JID: artem at jabber.aws-net.org.ua
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