[c-nsp] ibgp prefix advertisement

Mikisa Richard rmikisa at gmail.com
Tue Aug 8 09:44:58 EDT 2006


Hi all,

Scenario

AS29032--ebgp--CUSTOACESS(41.220.15.253)--ibgp--CUSTODIST(41.220.15.250)--ibgp--IXROUTER(41.220.15.252)


Problem is that CUSTODIST receives prefixes from CUSTOACESS but does not 
advertise them to IXROUTER.

from CUSTODIST ....

distro#show ip bgp su
BGP router identifier 41.220.15.250, local AS number 28941
BGP table version is 231, main routing table version 231
29 network entries and 30 paths using 3893 bytes of memory
8 BGP path attribute entries using 480 bytes of memory
5 BGP AS-PATH entries using 120 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP activity 78/633 prefixes, 105/75 paths, scan interval 15 secs

Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down 
State/PfxRcd
41.220.15.252   4 28941     388     370      231    0    0 00:25:14       25
41.220.15.253   4 28941     953     949      231    0    0 15:46:40        5


distro#show ip bgp ne 41.220.15.253 ro
BGP table version is 231, local router ID is 41.220.15.250
Status codes: s suppressed, d damped, h history, * valid, > best, i - 
internal
Origin codes: i - IGP, e - EGP, ? - incomplete

    Network          Next Hop            Metric LocPrf Weight Path
*>i0.0.0.0          41.220.15.253                 100      0 29032 i
*>i41.220.0.0/20    41.220.15.253            0    100      0 29032 i
* i41.220.14.0/23   41.220.15.253            0    100      0 i
*>i217.212.230.0/23 41.220.15.253                 100      0 29032 i
*>i217.212.242.0/23 41.220.15.253                 100      0 29032 i

Total number of prefixes 5

distro#show ip bgp 217.212.242.0
BGP routing table entry for 217.212.242.0/23, version 206
Paths: (1 available, best #1, table Default-IP-Routing-Table)
   Not advertised to any peer
   29032, (received & used)
     41.220.15.253 (metric 11) from 41.220.15.253 (41.220.15.253)
       Origin IGP, localpref 100, valid, internal, best


distro#show ip bgp ne 41.220.15.252 ad
distro#


Any ideas on why CUSTODIST is not advertising?

-- 
Richard


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