1、联邦解析
<a href="http://s1.51cto.com/wyfs02/M02/77/BC/wKiom1ZtLuagsgevAAAxDZq9-k0391.png" target="_blank"></a>
联邦工作原理:在AS内部手动划分多个私有AS(联邦中的私有AS好不增加AS-PATH的路径长度)
配置步骤:
第一步:router bgp 小AS号(私有AS号)
第二步:声明所在大AS号
第三步:小AS号之间互指peer
2、实验拓扑
3、基础配置
R1配置
interface Loopback0
ip address 1.1.1.1 255.255.255.0
interface Serial0/0
ip address 12.1.1.1 255.255.255.0
router bgp 1
no synchronization
bgp router-id 1.1.1.1
network 1.1.1.0 mask 255.255.255.0
neighbor 12.1.1.2 remote-as 2
no auto-summary
R2配置
ip address 2.2.2.2 255.255.255.0
ip address 12.1.1.2 255.255.255.0
interface Serial0/1
ip address 23.1.1.2 255.255.255.0
router ospf 110
router-id 2.2.2.2
network 2.2.2.0 0.0.0.255 area 0
network 23.1.1.0 0.0.0.255 area 0
R3配置
ip address 3.3.3.3 255.255.255.0
ip address 34.1.1.3 255.255.255.0
ip address 23.1.1.3 255.255.255.0
router-id 3.3.3.3
network 3.3.3.0 0.0.0.255 area 0
network 34.1.1.0 0.0.0.255 area 0
R4配置
ip address 4.4.4.4 255.255.255.0
ip address 34.1.1.4 255.255.255.0
router-id 4.4.4.4
network 4.4.4.0 0.0.0.255 area 0
4、配置邻邦解决水平分割
router bgp 64512
bgp router-id 2.2.2.2
bgp confederation identifier 2
neighbor 3.3.3.3 remote-as 64512
neighbor 3.3.3.3 update-source Loopback0
neighbor 3.3.3.3 next-hop-self
neighbor 12.1.1.1 remote-as 1
bgp router-id 3.3.3.3
bgp confederation peers 64513
neighbor 2.2.2.2 remote-as 64512
neighbor 2.2.2.2 update-source Loopback0
neighbor 4.4.4.4 remote-as 64513
neighbor 4.4.4.4 ebgp-multihop 255
neighbor 4.4.4.4 update-source Loopback0
router bgp 64513
bgp router-id 4.4.4.4
bgp confederation peers 64512
neighbor 3.3.3.3 ebgp-multihop 255
本文转自开源殿堂 51CTO博客,原文链接http://blog.51cto.com/kaiyuandiantang/1722529:,如需转载请自行联系原作者