Re: BGP - multihop & ttl security

Hi,

Thanks to all for very detail explanation. I understand that ttl behaviour
different than ebgp-multihop, but both matters when establishing the
peering.
But my problem here, I get the adjacency up. But if ttl-security is
configured, received prefixes are not chosen as best routes..

PE1#show ip bgp summary
BGP router identifier 10.1.1.1, local AS number 65001
BGP table version is 24, main routing table version 24
26 network entries using 2938 bytes of memory
26 path entries using 1352 bytes of memory
13/10 BGP path/bestpath attribute entries using 1404 bytes of memory
2 BGP rrinfo entries using 48 bytes of memory
5 BGP AS-PATH entries using 120 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
10 BGP filter-list cache entries using 120 bytes of memory
BGP using 5982 total bytes of memory
BGP activity 26/0 prefixes, 26/0 paths, scan interval 60 secs

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
 State/PfxRcd
10.1.1.100 4 100 47 55 24 0 0 00:41:51 4
10.1.1.254 4 65001 37 31 24 0 0 00:22:31 12
140.100.1.2 4 1540 48 48 24 0 0 00:40:16 9
PE1#sh
PE1#show ip bg
PE1#show ip bgp | i
PE1#show ip bgp | include 10.1.1.100
* 0.0.0.0 10.1.1.100 0 100 200 i
* 101.101.101.0/24 10.1.1.100 0 0 100 i
* 172.16.111.0/24 10.1.1.100 0 0 100 i
* 172.16.113.0/24 10.1.1.100 0 100 200 i
PE1#sh
PE1#sh ip bg
PE1#sh ip bgp 101.101.101.0
BGP routing table entry for 101.101.101.0/24, version 0
Paths: (1 available, no best path)
  Not advertised to any peer
  100
    10.1.1.100 (inaccessible) from 10.1.1.100 (10.1.1.100)
      Origin IGP, metric 0, localpref 100, valid, external
PE1#

Regards,
John

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Received on Tue Sep 07 2010 - 21:53:21 ART