H3C BGP

2023-01-31 02:01:45 BGP H3C

BGP的基本配置:

拓扑见QQ收藏

R1配置:
[R1]bgp 1000

[R1-bgp]router-id 1.1.1.1

[R1-bgp]peer 4.4.4.4 as-number 1000
[R1-bgp]peer 4.4.4.4 connect-interface LoopBack 0    修改更新源地址

[R1-bgp]peer 13.1.1.3 as-number 2000

[R1-bgp]address-family ipv4
[R1-bgp-ipv4]peer 4.4.4.4 enable         激活邻居,不管是IBGP还是EBGP都需要激活
[R1-bgp-ipv4]peer 4.4.4.4 next-hop-local       next-hop-self
[R1-bgp-ipv4]peer 13.1.1.3 enable
R2配置:

[R2]bgp 1000

[R2-bgp]router-id 2.2.2.2

[R2-bgp]peer 23.1.1.3 as-number 2000
[R2-bgp]peer 4.4.4.4 as-number 1000
[R2-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[R2-bgp]address-family ipv4
[R2-bgp-ipv4]peer 4.4.4.4 enable
[R2-bgp-ipv4]peer 4.4.4.4 next-hop-local

[R2-bgp-ipv4]peer 23.1.1.3 enable

R3配置:

[R3]bgp 2000

[R3-bgp]router-id 3.3.3.3
[R3-bgp]peer 13.1.1.1 as-number 1000
[R3-bgp]peer 23.1.1.2 as-number 1000
[R3-bgp]address-family ipv4
[R3-bgp-ipv4]peer 13.1.1.1 enable
[R3-bgp-ipv4]peer 23.1.1.2 enable

[R3-bgp-ipv4]network 3.3.3.3 32

R4配置:

[R4]bgp 1000
[R4-bgp]peer 1.1.1.1 as-number 1000
[R4-bgp]peer 1.1.1.1 connect-interface LoopBack 0
[R4-bgp]peer 2.2.2.2 as-number 1000
[R4-bgp]peer 2.2.2.2 connect-interface LoopBack 0

[R4-bgp]address-family ipv4

[R4-bgp-ipv4]network 4.4.4.4 32

[R4-bgp-ipv4]peer 2.2.2.2 enable
[R4-bgp-ipv4]peer 1.1.1.1 enable

查看BGP邻居的命令:

<R1>dis bgp peer ipv4

查看BGP路由表的命令:

<R1>dis bgp routing-table ipv4

指定源和目的ping:    ping -a 4.4.4.4 3.3.3.3   4.4.4.4为源,3.3.3.3为目的

BGP的负载均衡:

[R4]bgp 1000
[R4-bgp]address-family ipv4
[R4-bgp-ipv4]balance 2     可以负载两条路由

 

BGP路由的聚合:

[R2]bgp 1000
[R2-bgp]address-family ipv4
[R2-bgp-ipv4]aggregate 172.16.10.0 24 detail-suppressed  (抑制明细路由)

 

BGP路由属性:

本地优先级:(只在本地AS内有意义)越大越好,默认为100

[R1]acl basic 2000
[R1-acl-ipv4-basic-2000]rule permit source 3.3.3.3 0

[R1]route-policy 1 permit node 1

[R1-route-policy-1-1]if-match ip address acl 2000
[R1-route-policy-1-1]apply local-preference 200   修改本地优先级为200
[R1-route-policy-1-1]quit
[R1]route-policy 1 permit node 2         route-map的空语句放行
[R1-route-policy-1-2]quit
[R1]bgp 1000
[R1-bgp]address-family ipv4
[R1-bgp-ipv4]peer 4.4.4.4 route-policy 1 export  出接口修改

注意:

[R1]bgp 1

[R1-bgp]address-family ipv4
[R1-bgp-ipv4]default local-preference 110 (这条命令会修改所有的路由条目优先级)

MED:(在直连邻居的一跳AS内传递)越小越好,默认为0

[R3]acl basic 2000
[R3-acl-ipv4-basic-2000]rule permit source 3.3.3.3 0
[R3-acl-ipv4-basic-2000]quit
[R3]route-policy 1 permit node 1
[R3-route-policy-1-1]if-match ip address acl 2000
[R3-route-policy-1-1]apply cost 50
[R3-route-policy-1-1]quit
[R3]route-policy 1 permit node 2           空语句放行
[R3-route-policy-1-2]quit
[R3]route-policy 2 permit node 1
[R3-route-policy-2-1]if-match ip address acl 2000
[R3-route-policy-2-1]apply cost 100
[R3-route-policy-2-1]quit
[R3]route-policy 2 permit node 2          空语句放行
[R3-route-policy-2-2]quit
[R3]bgp 2000
[R3-bgp]address-family ipv4
[R3-bgp-ipv4]peer 13.1.1.1 route-policy 1 export
[R3-bgp-ipv4]peer 23.1.1.2 route-policy 2 export  出接口调用

BGP认证:

[R4]bgp 1000
[R4-bgp]peer 1.1.1.1 passWord simple 123   两端都要配置

 

路由反射器:

拓扑见QQ收藏:(删除了R2和R3的BGP邻居,其余配置和 上面一样)

[R4]bgp 1000

[R4-bgp]address-family ipv4

[R4-bgp-ipv4]peer 1.1.1.1 reflect-client
[R4-bgp-ipv4]peer 2.2.2.2 reflect-client   

注意:该图中R4作为服务端,R1和R2作为客户端

 

联邦:

拓扑见QQ收藏:

R1配置:

[R1]bgp 15

[R1-bgp]router-id 1.1.1.1
[R1-bgp]confederation id 1000                 主AS号
[R1-bgp]confederation peer-as 45 25       子AS号
[R1-bgp]peer 15.1.1.5 as-number 15
[R1-bgp]address-family ipv4
[R1-bgp-ipv4]peer 15.1.1.5 enable

R2配置:

[R2]bgp 25

[R2-bgp]router-id 2.2.2.2
[R2-bgp]confederation id 1000
[R2-bgp]confederation peer-as 15 45
[R2-bgp]peer 25.1.1.5 as-number 15
[R2-bgp]address-family ipv4
[R2-bgp-ipv4]peer 25.1.1.5 enable

R4配置:

[R4]bgp 45
[R4-bgp]router-id 4.4.4.4

[R4-bgp]confederation id 1000

[R4-bgp]peer 45.1.1.5 as-number 15
[R4-bgp]confederation peer-as 15 25
[R4-bgp]address-family ipv4
[R4-bgp-ipv4]peer 45.1.1.5 enable

R5配置:

[R5]bgp 15
[R5-bgp]router-id 5.5.5.5
[R5-bgp]confederation id 1000
[R5-bgp]confederation peer-as 25 45
[R5-bgp]peer 25.1.1.2 as-number 25
[R5-bgp]peer 45.1.1.4 as-number 45
[R5-bgp]peer 15.1.1.1 as-number 15
[R5-bgp]peer 35.1.1.3 as-number 2000
[R5-bgp]address-family ipv4
[R5-bgp-ipv4]peer 25.1.1.2 enable
[R5-bgp-ipv4]peer 45.1.1.4 enable
[R5-bgp-ipv4]peer 15.1.1.1 enable
[R5-bgp-ipv4]peer 15.1.1.1 next-hop-local
[R5-bgp-ipv4]peer 45.1.1.4 next-hop-local
[R5-bgp-ipv4]peer 25.1.1.2 next-hop-local
[R5-bgp-ipv4]peer 35.1.1.3 enable
R3配置:

[R3]bgp 2000
[R3-bgp]router-id 3.3.3.3
[R3-bgp]peer 35.1.1.5 as-number 1000
[R3-bgp]address-family ipv4
[R3-bgp-ipv4]peer 35.1.1.5 enable

 

向对等体组发送缺省路由:

[R1]bgp 1
[R1-bgp]router-id 1.1.1.1

[R1-bgp]address-family ipv4
[R1-bgp-ipv4]peer 2.2.2.2 default-route-advertise   

执行peer default-route-advertise命令后,不论本地路由表中是否存在缺省路由,都将向指定对等体发布一条下一跳地址为本地地址的缺省路由

 

 传播时不携带私有AS号

[R3]bgp 2

[R3-bgp]address-family ipv4

[R3-bgp-ipv4]peer 13.1.1.1 public-as-only

 

路由重分发:

[R1]bgp 1
[R1-bgp]address-family ipv4

[R1-bgp-ipv4]import-route direct     缺省情况下,引入的源路由协议的缺省路由不会被引入BGP

 

允许BGP引入其他路由协议的默认路由:

[R1]bgp 1
[R1-bgp]address-family ipv4

[R1-bgp-ipv4]default-route imported

 

修改BGP路由的管理距离:

[R1]bgp 1
[R1-bgp]address-family ipv4

[R1-bgp-ipv4]preference 150 160 110   (EBGP  IBGP  Loacl BGP)

缺省情况下,ebgp-valueibgp-value都为256,而local-value是130,取值范围都为1~256

 

修改BGP的计时器:

[R1]bgp 1

[R1-bgp]timer keepalive 50 hold 150

缺省情况下,发送keepalive的时间间隔为60秒;保持定时器时间为180秒

 

软清进程:

<R1>refresh bgp all export ipv4 

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