Hey there.
I d like to set the next hop attribute to myself from prefix.
Instead of doing a route map that match everything and set ip next-hop to me
I'd like to use the as-path feature to play with some regex.
Here are the prefix I'm learning and that I want to modify:
Rack1R4#sh ip bgp
BGP table version is 28, local router ID is 150.1.4.4
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
*> 28.119.16.0/24 204.12.1.254 0 0 54 i
*> 28.119.17.0/24 204.12.1.254 0 0 54 i
*> 112.0.0.0 204.12.1.254 0 54 50 60 i
*> 113.0.0.0 204.12.1.254 0 54 50 60 i
*> 114.0.0.0 204.12.1.254 0 54 i
*> 115.0.0.0 204.12.1.254 0 54 i
*> 116.0.0.0 204.12.1.254 0 54 i
*> 117.0.0.0 204.12.1.254 0 54 i
*> 118.0.0.0 204.12.1.254 0 54 i
*> 119.0.0.0 204.12.1.254 0 54 i
*>i150.1.1.0/24 155.1.146.1 0 100 0 i
*>i150.1.2.0/24 155.1.0.2 0 100 0 200 i
*>i150.1.3.0/24 155.1.0.3 0 100 0 i
*> 150.1.4.0/24 0.0.0.0 0 32768 i
*>i150.1.5.0/24 155.1.0.5 0 100 0 i
*>i150.1.6.0/24 155.1.146.6 0 100 0 i
*>i150.1.7.0/24 155.1.67.7 0 100 0 i
I'd like to match all the prefix learned by as 54.
so here is my config:
router bgp 100
no synchronization
bgp log-neighbor-changes
network 150.1.4.0 mask 255.255.255.0
neighbor 155.1.146.1 remote-as 100
neighbor 155.1.146.1 route-map TO_R1 out
neighbor 204.12.1.254 remote-as 54
route-map TO_R1 permit 10
match as-path 1
set ip next-hop 155.1.146.4
Rack1R4#sh ip as-path-access-list 1
AS path access list 1
permit ^54_
it should match all the 11X prefix right ? but it doesnt ...
Rack1R4#sh ip bgp neighbors 155.1.146.1 adv
Total number of prefixes 0
Even with that config it does not work ...
route-map TO_R1 permit 10
match as-path 1
set ip next-hop 155.1.146.4
Rack1R4#sh ip as-path-access-list
AS path access list 1
permit .*
Rack1R4#sh ip bgp ne 155.1.146.1 ad
Total number of prefixes 0
I dont know what I m doing wrong ?
Also please somebody tell me that I ll not deal with that kind of regex
during the CCIE lab exam : (_64[6-9][0-9][0-9]_|_65[0-9][0-9][0-9]_)
Thanks :)
--
Nicolas MICHEL
Ingenieur Réseaux et Securité (CCNA/CCNP and CCIE Pending)
Centre d’Expertise et d’Assistance Clients
Spie communication
Tél : +33 (0)141464924
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