建立BGP互连
前提：接口互通
1、
各路由器的配制如下：
R1(config)#router bgp 100
R1(config-router)#neig
R1(config-router)#neighbor 12.0.0 .2
remote-as 200
R1(config-router)#neig
R1(config-router)#neighbor 15.0.0 .5
remote-as 300
R1(config-router)#net
R1(config-router)#network 1.1.1 .0
mask 255.255.255.0
R1(config-router)#end
R2(config)#router eigrp 100
R2(config-router)#net
R2(config-router)#network 23.0.0 .0
0.0.0.0
R2(config-router)#no au
R2(config-router)#exit
R2(config)#
R2(config)#router bgp 200
R2(config-router)#neighbor 23.0.0 .3
remote-as 200
R2(config-router)#neighbor 12.0.0 .1
remote-as 100
R2(config-router)#network 2.2.2 .0
mask 255.255.255.0
R2(config-router)#end
R3(config)#router eigrp 100
R3(config-router)#no au
R3(config-router)#net 23.0.0 .0
0.0.0.255
R3(config-router)#net 3.3.3 .0
0.0.0.0
R3(config-router)#exit
R3(config)#
R3(config)#
R3(config)#router bgp 200
R3(config-router)#neighbor 23.0.0 .2
remote-as 200
R3(config-router)#neighbor 34.0.0.4
remote-as 300
R3(config-router)#networ
R3(config-router)#network 3.3.3 .0
mask 255.255.255.0
R3(config-router)#end
R4(config)#router eigrp 100
R4(config-router)#no au
R4(config-router)#net 4.4.4 .0
0.0.0.0
R4(config-router)#net 45.0.0.0 0.0.0 .0
R4(config-router)#exit
R4(config)#
R4(config)#
R4(config)#router bgp 300
R4(config-router)#neighbor 45.0.0.5
remote-as 300
R4(config-router)#neighbor 34.0.0.3
remote-as 200
R4(config-router)#network 4.4.4 .0
mask 255.255.255.0
R4(config-router)#end
R5(config)#router eigrp 100
R5(config-router)#no au
R5(config-router)#net 45.0.0.0 0.0.0 .0
R5(config-router)#net 5.5.5 .0
0.0.0.0
R5(config-router)#exit
R5(config)#
R5(config)#
R5(config)#
R5(config)#router bgp 300
R5(config-router)#neighbor 45.0.0.4
remote-as 300
R5(config-router)#neighbor 45.0.0.4 next-h
R5(config-router)#neighbor 15.0.0 .1
remote-as 100
R5(config-router)#network 5.5.5 .0
mask 255.255.255.0
R5(config-router)#end
2、
查看bgp建立情况
R1#sh ip bgp
BGP table version is 6, local router ID is 1.1.1 .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
*> 1.1.1 .0/24 0.0.0 .0 0 32768 i
* 2.2.2 .0/24 15.0.0 .5 0 300 200 i
*> 12.0.0 .2 0 0 200 i
* 3.3.3 .0/24 15.0.0 .5 0 300 200 i
*> 12.0.0 .2 0 200 i
*> 4.4.4 .0/24 15.0.0 .5 0 300 i
*> 5.5.5 .0/24 15.0.0 .5 0 0 300 i
R2#sh ip bgp
BGP table version is 6, local router ID is 23.0.0 .2
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
*> 1.1.1 .0/24 12.0.0 .1 0 0 100 i
*> 2.2.2 .0/24 0.0.0 .0 0 32768 i
*>i3.3.3 .0/24 23.0.0 .3 0 100
0 i
*> 4.4.4 .0/24 12.0.0 .1 0 100 300 i
* i 34.0.0.4 0 100
0 300 i
* i5.5.5 .0/24 34.0.0.4 0 100
0 300 i
*> 12.0.0 .1 0 100 300 i
R2#
R3#sh ip bgp
BGP table version is 6, local router ID is 3.3.3 .3
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
* 1.1.1 .0/24 34.0.0.4 0 300 100 i
*>i 23.0.0 .2 0 100
0 100 i
*>i2.2.2 .0/24 23.0.0 .2 0 100
0 i
*> 3.3.3 .0/24 0.0.0 .0 0 32768 i
* i4.4.4 .0/24 23.0.0 .2 0 100
0 100 300 i
*> 34.0.0.4 0 0 300 i
* i5.5.5 .0/24 23.0.0 .2 0 100
0 100 300 i
*> 34.0.0.4 0 300 i
R3#trac
R4(config)#do sh ip bgp
BGP table version is 7, 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
Origin codes: i - IGP, e - EGP, ? -
incomplete
Network Next Hop Metric LocPrf Weight Path
* 1.1.1 .0/24 34.0.0.3 0 200 100 i
*>i 45.0.0.5 0 100
0 100 i
* i2.2.2 .0/24 45.0.0.5 0 100
0 100 200 i
*> 34.0.0.3 0 200 i
* i3.3.3 .0/24 45.0.0.5 0 100
0 100 200 i
*> 34.0.0.3 0 0 200 i
*> 4.4.4 .0/24 0.0.0 .0 0 32768 i
*>i5.5.5 .0/24 45.0.0.5 0 100
0 i
R5#sh ip bgp
BGP table version is 8, local router ID is
45.0.0.5
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
*> 1.1.1 .0/24 15.0.0 .1 0 0 100 i
*>i2.2.2 .0/24 45.0.0.4 0 100
0 200 i
* 15.0.0 .1 0 100 200 i
* 3.3.3 .0/24 15.0.0 .1 0 100 200 i
*>i 45.0.0.4 0 100
0 200 i
*>i4.4.4 .0/24 45.0.0.4 0 100
0 i
*> 5.5.5 .0/24 0.0.0 .0 0 32768 i
R5#
