viernes, 24 de mayo de 2013
BGP as-path preepend
R1#sh run | sec bgp
router bgp 65000
bgp log-neighbor-changes
network 1.1.1.0 mask 255.255.255.0
neighbor 2.2.2.2 remote-as 65000
neighbor 2.2.2.2 update-source Loopback0
neighbor 2.2.2.2 next-hop-self
neighbor 3.3.3.3 remote-as 65000
neighbor 3.3.3.3 update-source Loopback0
neighbor 3.3.3.3 next-hop-self
neighbor 4.4.4.4 remote-as 65001
neighbor 4.4.4.4 ebgp-multihop 2
neighbor 4.4.4.4 update-source Loopback0
neighbor 4.4.4.4 route-map red3 out
R4#sh ip bgp
BGP table version is 54, local router ID is 4.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
r> 1.1.1.0/24 1.1.1.1 0 0 65000 i
*> 2.2.2.0/24 1.1.1.1 0 65000 i
*>i 3.3.3.0/24 6.6.6.6 0 100 0 65000 i
* 1.1.1.1 0 65000 65000 65000 65000 i
*> 4.4.4.0/24 0.0.0.0 0 32768 i
* i 5.5.5.0/24 5.5.5.5 0 100 0 i
*> 40.40.40.2 2297856 32768 i
* i 6.6.6.0/24 6.6.6.6 0 100 0 i
*> 40.40.40.2 2809856 32768 i
*> 10.10.10.0/30 1.1.1.1 0 65000 i
*> 10.10.10.4/30 1.1.1.1 0 65000 i
*>i 10.10.10.8/30 6.6.6.6 0 100 0 65000 i
*> 40.40.40.0/30 0.0.0.0 0 32768 i
R5#trace 3.3.3.3
Type escape sequence to abort.
Tracing the route to 3.3.3.3
VRF info: (vrf in name/id, vrf out name/id)
1 40.40.40.6 10 msec 10 msec 10 msec
2 30.30.30.1 23 msec 19 msec 19 msec
3 10.10.10.5 [AS 65000] 32 msec 30 msec *
R5#trace 13.13.13.13
Type escape sequence to abort.
Tracing the route to 13.13.13.13
VRF info: (vrf in name/id, vrf out name/id)
1 40.40.40.1 10 msec 9 msec 9 msec
2 20.20.20.1 19 msec 21 msec 22 msec
3 10.10.10.2 [AS 65000] 21 msec 33 msec *
R5#
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