Re: [isp-bgp] BGP AS path

[Robert Raszuk <raszuk@...>]

> I don't think this feature is available in normal BGP v4
> Please correct me if I am wrong. Thx

Yes you are wrong.

router bgp 200
 no synchronization
 bgp log-neighbor-changes
 timers bgp 10 30
 redistribute connected
 redistribute ospf 200 match internal external 1 external 2
 neighbor 21.20.1.3 remote-as 100
 neighbor 21.20.1.3 advertisement-interval 5
 neighbor 21.20.1.3 allowas-in 4
 no auto-summary

R1#sh ip bgp summ
BGP router identifier 20.50.50.1, local AS number 200
                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
BGP table version is 14, main routing table version 14
7 network entries using 791 bytes of memory
7 path entries using 364 bytes of memory
3/2 BGP path/bestpath attribute entries using 396 bytes of memory
1 BGP AS-PATH entries using 24 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 using 1575 total bytes of memory
BGP activity 10/3 prefixes, 10/3 paths, scan interval 60 secs

Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down 
State/PfxRcd
21.20.1.3       4   100      37      38       14    0    0 00:00:33        3

R1#sh ip bgp
BGP table version is 14, local router ID is 20.50.50.1
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
*> 20.1.1.1/32      0.0.0.0                  0         32768 ?
*> 20.9.9.9/32      21.20.1.3                              0 100 200 ?
                                                                 ^^^^^
*> 20.50.50.1/32    0.0.0.0                  0         32768 ?
*> 20.51.51.1/32    21.20.1.3                              0 100 200 ?
                                                                 ^^^^^
*> 21.20.1.0/24     0.0.0.0                  0         32768 ?
*> 21.20.11.0/24    0.0.0.0                  0         32768 ?
*> 29.20.9.0/24     21.20.1.3                              0 100 200 ?
                                                                 ^^^^^

Tested with the latest conn_isp 120S image 120(31.1)S1 :).


Cheers,
R.

PS. It is true that it was originally delivered for hub & spoke l3vpns. 
It's use just spreaded though :).





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