R1 bgp 100 router-id 1.1.1.1 peer 10.1.12.2 as-number 300 R2 bgp 300 router-id 2.2.2.2 peer 10.1.12.1 as-number 100 检查现象:R1-display bgp peer ? R4 bgp 300 peer 2.2.2.2 as-number 300 peer 2.2.2.2 connect-interface LoopBack 0 检查现象:display BGP peer R1 bgp 100 network 1.1.1.1 32 R5 bgp 200 network 10.1.5.5 32 R2 bgp 300 peer 3.3.3.3 as-number 300 peer 300 peer 2.2.2.2 connect-interface LoopBack0 peer 4.4.4.4 as-number 300 peer 4.4.4.4 connect-interface
interface Ethernet1/0/1 undo shutdown ip binding vpn-instance A bgp 100 router-id 1.1.1.1 peer 3.3.3.3 as-number family vpnv6 policy vpn-target peer 3.3.3.3 enable # ipv6-family vpn-instance A peer 2222::1 as-number interface Ethernet1/0/1 undo shutdown ip binding vpn-instance A bgp 100 router-id 3.3.3.3 peer 1.1.1.1 as-number family vpnv6 policy vpn-target peer 1.1.1.1 enable # ipv6-family vpn-instance A peer 3333::1 as-number 300 AR1 bgp 200 router-id 10.10.10.10 peer 2222::254 as-number 100 # ipv6-family unicast undo
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 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 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 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
2 peer 13.1.1.3 as-number 2 # ipv4-family unicast undo synchronization network 20.1.1.0 255.255.255.0 2 peer 4.4.4.4 connect-interface LoopBack0 peer 12.1.1.1 as-number 1 # ipv4-family unicast undo 2 peer 4.4.4.4 connect-interface LoopBack0 peer 13.1.1.1 as-number 1 # ipv4-family unicast undo 2 peer 2.2.2.2 connect-interface LoopBack0 peer 3.3.3.3 as-number 2 peer 3.3.3.3 connect-interface LoopBack0 peer 45.1.1.5 as-number 3 peer 46.1.1.6 as-number 3 # ipv4-family unicast undo synchronization
R1: [r1]bgp 100 [r1-bgp]router-id 1.1.1.1 [r1-bgp]peer 10.1.13.3 as-number 3456 ----使用联邦AS号建立BGP对等体, [r3-bgp]router-id 3.3.3.3[r3-bgp]confederation id 3456 ---定义联邦AS号 [r3-bgp]peer 10.1.13.1 as-number 100 [r3-bgp]peer 4.4.4.4 as-number 64512 ----联邦成员之间建立IBGP对等体关系时使用成员AS号 [r3-bgp]peer 4.4.4.4 connect-interface [r4-bgp]peer 5.5.5.5 as-number 64513 [r4-bgp]peer 5.5.5.5 connect-interface LoopBack 0 [r4-bgp]peer 200 R6: [r6]bgp 64513 [r6-bgp]router-id 6.6.6.6 [r6-bgp]confederation id 3456 [r6-bgp]peer 5.5.5.5 as-number
255.255.255.252 # interface LoopBack0 ip address 1.1.1.1 255.255.255.255 # bgp 100 peer 10.1.12.2 as-number 100 peer 10.1.23.2 as-number 300 peer 10.1.24.2 as-number 200 peer 10.1.25.2 as-number 100 # ipv4 200 peer 10.1.37.2 as-number 300 peer 10.1.38.2 as-number 300 # ipv4-family unicast undo synchronization 300 peer 10.1.78.2 as-number 300 # ipv4-family unicast undo synchronization peer 10.1.37.1 enable 300 peer 10.1.78.1 as-number 300 # ipv4-family unicast undo synchronization network 88.88.88.88
interface NULL0 # interface LoopBack0 ip address 10.1.1.1 255.255.255.0 # bgp 10 peer 10.1.12.2 as-number 100 peer 10.2.12.2 as-number 100 # ipv4-family unicast undo synchronization network 10.1.1.0 interface NULL0 # interface LoopBack0 ip address 10.2.2.2 255.255.255.0 # bgp 100 peer 10.4.4.4 as-number 100 peer 10.4.4.4 connect-interface LoopBack0 peer 10.5.5.5 as-number 100 peer 10.5.5.5 connect-interface 10 # ipv4-family vpn-instance out peer 10.2.12.1 as-number 10 peer 10.2.12.1 allow-as-loop
R4: # ip route-static 3.3.3.3 255.255.255.255 192.168.34.1 # 三:配置IBGP R1: # bgp 100 peer 2.2.2.2 as-number 255.255.255.255 network 10.1.1.0 255.255.255.0 peer 2.2.2.2 enable # R2: bgp 100 peer 1.1.1.1 as-number 255.255.255.255 network 10.1.2.0 255.255.255.0 peer 1.1.1.1 enable # R3: # bgp 200 peer 4.4.4.4 as-number # bgp 100 peer 3.3.3.3 as-number 200 peer 3.3.3.3 ebgp-max-hop 2 #EBGP邻居建立是,默认 255.255.255.255 192.168.13.1 ip route-static 1.1.1.1 255.255.255.255 192.168.13.5 # bgp 200 peer 1.1.1.1 as-number
peer 10.123.12.2 as 64512 //配置R2 [R2]bgp 64512 [R2-bgp] router-id 10.123.2.2 [R2-bgp] peer 10.123.3.3 as-number 10.123.3.3 connect-interface LoopBack0 [R2-bgp] peer 10.123.3.3 next-hop-local [R2-bgp] peer 10.123.12.1 as-number 100 //配置R3 [R3]bgp 64512 [R3-bgp] router-id 10.123.3.3 [R3-bgp] peer 10.123.2.2 as-number 64512 [R3- bgp] peer 10.123.2.2 connect-interface LoopBack0 [R3-bgp] peer 10.123.4.4 as-number 64512 [R3-bgp] peer LoopBack 0 [R4]bgp 64512 [R4-bgp] peer 10.0.2.2 as-number 64512 [R4-bgp] peer 10.0.2.2 connect-interface
:标识路由器 配置EBGP邻居关系:AS之间传递路由 以RTB、RTD之间建立EBGP关系为例: [RTB] [RTB]bgp 100 [RTB-bgp]peer 10.1.24.4 as-number 200 //BGP邻居关系的类型主要靠配置的AS号区别,peer关键字后面是对端邻居的接口IP地址,as-number后面是邻居路由器所在的AS号,AS号相同则为IBGP邻居关系;AS号不同,则为EBGP [RTD] [RTD]bgp 200 [RTD-bgp]peer 10.1.24.2 as-number 100 5.3.4 第四步 配置IBGP邻居关系:本例中RTB和RTC建立IBGP 邻居关系(本例使用逻辑接口建立IBGP邻居关系): [RTB] [RTB]bgp 100 [RTB-bgp]peer 33.33.33.33 as-number 100 //AS号相同则为IBGP邻居关系 [RTB-bgp]peer 33.33.33.33 connect-interface LoopBack 0 [RTC] [RTC]bgp 100 [RTC-bgp]peer 22.22.22.22 as-number
round-trip min/avg/max = 4/8/19 ms[~PE1-LoopBack1] 在PE之间建立MP-IBGP对等体关系 配置PE1 PE1:bgp 100 peer 3.3.3.9 as-number 3.3.3.9 connect-interface LoopBack1 ipv4-family vpnv4 peer 3.3.3.9 enable 配置PE2 PE2:bgp 100 peer 1.1.1.9 as-number 11.1.1.1 255.255.255.255interface Ethernet1/0/0 ip address 10.1.1.1 255.255.255.0bgp 65410 peer 10.1.1.2 as-number unicast network 22.2.2.2 255.255.255.255 配置PE1 PE1:bgp 100 ipv4-family vpn-instance vpna peer 10.1.1.1 as-number 65410 配置PE2 PE2:bgp 100 ipv4-family vpn-instance vpna peer 10.2.1.1 as-number 65420 配置完成后,在PE设备上执行display
配置BGP对等体 [R1-bgp] peer {ipv4-address|ipv6-address} as-number {as-number-plain|as-number-dot} 创建BGP对等体 200 peer 21.21.21.2 as-number 200 network 1.1.1.0 24 R2: bgp 200 peer 12.12.12.1 as-number 100 peer 21.21.21.1 as-number 100 R2和R3之间建立回环peer(IBGP): 1 . 0 peer 3.3.3.3 next-hop-local R3: bgp 200 peer 2.2.2.2 as-number 200 peer 2.2.2.2 connect-interface 配置R3的回环EBGP R3: peer 4.4.4.4 as-number 300 peer 4.4.4.4 ebgp-max-hop 7 peer 4.4.4.4 connect-interface
route-static 192.168.219.0 24 30.30.30.20 # bgp配置, 把同AS内的ibgp peer也配置了 bgp 64512 peer 10.30.81.127 as-number 64512 peer 10.30.81.128 as-number 64512 peer 10.30.81.130 as-number 64512 peer 192.168.219.10 as-number ip route-static 10.30.81.0 24 30.30.30.10 # bgp配置, 把同AS内的ibgp peer也配置了 bgp 64513 peer 10.30.81.118 as-number 64512 peer 10.30.81.118 ebgp-max-hop 5 peer 10.30.81.118 connect-interface g0/0/0 peer 192.168.219.20 as-number 64513 peer 192.168.219.40 as-number 64513 peer 192.168.219.20 reflect-client peer 192.168.219.40 reflect-client
/// 使能EVPN [Leaf1]bgp 100 [Leaf1-bgp] router-id 11.3.3.3 [Leaf1-bgp] peer 11.1.1.1 as-number ###使能EVPN [Leaf2]bgp 100 [Leaf2-bgp] router-id 11.4.4.4 [Leaf2-bgp] peer 11.1.1.1 as-number [Spine]display current-configuration configuration bgp # bgp 100 router-id 11.1.1.1 peer 11.3.3.3 as-number 100 peer 11.3.3.3 connect-interface LoopBack1 peer 11.4.4.4 as-number 100 peer 11.4.4.4 connect-interface
1.1配置BGP对等体: [Router-bgp] peer x.x.x.x as-number as-num • Peer关键字后面的x.x.x.x为对等体的IP地址,本设备与该IP地址之间必须路由可达 ]peer 2.2.2.2 connect-interface LoopBack 0--------用自己的loopback 0 接口与2.2.2建立关系 [r1-bgp]peer 5.5.5.5 as-number 100 [r2-bgp]peer 1.1.1.1 connect-interface LoopBack 0 [r2-bgp]peer 5.5.5.5 as-number 100 [r2-bgp] LoopBack 0 [r5-bgp]peer 2.2.2.2 as-number 100 [r5-bgp]peer 2.2.2.2 connect-interface LoopBack 0 [ 100----这里的number不要弄混了,写对方的AS号 [r3-bgp]peer 23.0.0.1 ebgp-max-hop 1 [r2-bgp]peer 23.0.0.2 as-number
network [network-address](RIP/OSPF宣告网络) ospf [process-id](进入OSPF配置) area [area-id](配置OSPF区域) bgp [as-number ](进入BGP配置) peer [ip] as-number [as](配置BGP邻居) display ip routing-table(查看路由表) display bgp peer(查看BGP
protocols 查看路由协议信息 show ip route 查看路由表 BGP协议配置命令 router BGP autonomous-system 启用BGP路由协议 no router bgp as-number 关闭BGP路由协议 “ 其中,as-number为路由器所在的自治系统号,范围为1-65535 ” neighbor ip-address remote-as as-number 配置BGP邻居 no neighbor ip-address remote-as as-number 取消配置BGP邻居 “ 其中,ip-address为指定对等体的IP地址;as-number为指定对等体所在AS
GigabitEthernet3/0/0 ip address 10.110.1.1 255.255.255.0 pim sm # bgp 100 router-id 1.1.1.3 peer 192.168.5.1 as-number 192.168.2.2 255.255.255.0 pim bsr-boundary pim sm # bgp 100 router-id 1.1.1.2 peer 192.168.2.1 as-number address 10.110.2.1 255.255.255.0 pim sm igmp enable # bgp 200 router-id 2.2.2.1 peer 192.168.2.2 as-number LoopBack0 ip address 3.3.3.3 255.255.255.255 pim sm # bgp 200 router-id 3.3.3.3 peer 192.168.5.2 as-number
1.1.1.1 vni 2 head-end peer-list protocol bgp # interface NULL0 # bgp 100 peer 2.2.2.2 as-number 100 peer 2.2.2.2 connect-interface LoopBack0 peer 12.1.1.2 as-number 100 # ipv4-family unicast peer-list protocol bgp vni 3 head-end peer-list protocol bgp # interface NULL0 # bgp 100 peer 1.1.1.1 as-number 100 peer 1.1.1.1 connect-interface LoopBack0 peer 12.1.1.1 as-number 100 # ipv4-family unicast
GigabitEthernet0/0/1] ipv6 address 2001:20::20 64 三、配置6VPE 1、PE1上面的配置 bgp 100 router-id 1.1.1.1 peer 3.3.3.3 as-number vpn-instance vpna //通告站点的路由 network 2001:10:: 64 # 2、PE2上面的配置 bgp 100 router-id 3.3.3.3 peer 1.1.1.1 as-number