【实验9.11.4d】 BGP对等体组【IEEEnjoy.L.ZH】

来源：互联网发布：轩辕剑1 知乎编辑：程序博客网时间：2024/05/01 16:45

实验9.11.4d BGP对等体组

一、实验拓扑图:

二、具体实验:

实验需求：

ITAA是国际大型互联网技术培训中心，与之相连的有很多对等体，而这些对等体都是同等地位的，也就是说，对于这些对等体的邻居配置是相同的。所以为了简化配置过程，且便于管理，ITAA采用对等体组的配置方案。

基本配置：

R1:

SUB_A#sh run

Building configuration...

Current configuration : 1336 bytes

version 12.3

hostname SUB_A

interface Loopback0

ip address 1.1.1.1 255.255.255.0

interface Serial1/0

ip address 10.0.0.1 255.255.255.0

serial restart-delay 0

router bgp 100

no synchronization

bgp log-neighbor-changes

network 1.1.1.0 mask 255.255.255.0

neighbor 10.0.0.2 remote-as 200

no auto-summary

end

R2:

ITAA#sh run

Building configuration...

Current configuration : 1590 bytes

version 12.3

hostname ITAA

interface Loopback0

ip address 2.2.2.2 255.255.255.0

interface Serial1/0

ip address 20.0.0.2 255.255.255.0

serial restart-delay 0

interface Serial1/1

ip address 10.0.0.2 255.255.255.0

serial restart-delay 0

end

R3:

SUB_B#sh run

Building configuration...

Current configuration : 1295 bytes

version 12.3

hostname SUB_B

interface Serial1/1

ip address 20.0.0.3 255.255.255.0

serial restart-delay 0

router bgp 300

no synchronization

bgp log-neighbor-changes

network 3.3.3.0 mask 255.255.255.0

neighbor 20.0.0.2 remote-as 200

no auto-summary

end

连通性测试：

ITAA#ping 10.0.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 92/189/316 ms

ITAA#ping 20.0.0.3

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 20.0.0.3, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 24/105/200 ms

配置对等体组：

ITAA(config)#router bgp 200

ITAA(config-router)#bgp log-neighbor-changes

ITAA(config-router)#network 2.2.2.0 mask 255.255.255.0

ITAA(config-router)# neighbor GROUP peer-group

ITAA(config-router)# neighbor GROUP send-community

ITAA(config-router)# neighbor GROUP route-map LIMIT out

ITAA(config-router)# neighbor 10.0.0.1 remote-as 100

ITAA(config-router)# neighbor 10.0.0.1 peer-group GROUP

ITAA(config-router)# neighbor 20.0.0.3 remote-as 300

ITAA(config-router)# neighbor 20.0.0.3 peer-group GROUP

ITAA(config)#route-map LIMIT permit 10

ITAA(config)# set community 40

ITAA(config)#exit

对等体配置验证（客户端）：

SUB_A#sh ip bgp

BGP table version is 5, 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 10.0.0.2 0 0 200 i

SUB_A#sh ip bgp 2.2.2.0

BGP routing table entry for 2.2.2.0/24, version 5

Paths: (1 available, best #1, table Default-IP-Routing-Table)

Not advertised to any peer

200

10.0.0.2 from 10.0.0.2 (2.2.2.2)

Origin IGP, metric 0, localpref 100, valid, external, best

Community: 40

重点突出的部分就是验证的结果，在ITAA的其他对等体上已经可以收到2.2.2.0的路由条目，并且团体属性值也为40.

对等体配置验证（ITAA发布端）：

ITAA#sh ip bgp nei

BGP neighbor is 10.0.0.1, remote AS 100, external link

Member of peer-group GROUP for session parameters

BGP version 4, remote router ID 1.1.1.1

……….

BGP neighbor is 20.0.0.3, remote AS 300, external link

Member of peer-group GROUP for session parameters

BGP version 4, remote router ID 20.0.0.3

……….