BGP联盟.docx

BGP联盟配置1. 组网需求AS 200中有多台BGP路由器，为了减少IBGP的连接数，现将他们划分为3个子自治系统：AS 65001、AS 65002和AS 65003。其中AS 65001内的三台路由器建立IBGP全连接。2. 组网图图1-25 配置联盟组网图（路由应用）设备接口IP地址设备接口IP地址Router AS2/1200.1.1.1/24Router DEth1/110.1.5.1/24Eth1/110.1.2.1/24Eth1/210.1.3.2/24Eth1/210.1.3.1/24Router EEth1/110.1.5.2/24Eth1/310.1.4.1/24Eth1/210.1.4.2/24Eth1/410.1.1.1/24Router FEth1/19.1.1.1/24Router BEth1/110.1.1.2/24S2/0200.1.1.2/24Router CEth1/110.1.2.2/243. 配置步骤(1) 配置各接口的IP地址（略）(2) 配置BGP联盟# 配置Router A。 system-viewRouterA bgp 65001RouterA-bgp router-id 1.1.1.1RouterA-bgp confederation id 200RouterA-bgp confederation peer-as 65002 65003RouterA-bgp peer 10.1.1.2 as-number 65002 RouterA-bgp peer 10.1.1.2 next-hop-local RouterA-bgp peer 10.1.2.2 as-number 65003RouterA-bgp peer 10.1.2.2 next-hop-local RouterA-bgp quit# 配置Router B。 system-viewRouterB bgp 65002RouterB-bgp router-id 2.2.2.2RouterB-bgp confederation id 200RouterB-bgp confederation peer-as 65001 65003RouterB-bgp peer 10.1.1.1 as-number 65001RouterB-bgp quit# 配置Router C。 system-viewRouterC bgp 65003RouterC-bgp router-id 3.3.3.3RouterC-bgp confederation id 200RouterC-bgp confederation peer-as 65001 65002RouterC-bgp peer 10.1.2.1 as-number 65001RouterC-bgp quit(3) 配置AS 65001内的IBGP连接# 配置Router A。RouterA bgp 65001RouterA-bgp peer 10.1.3.2 as-number 65001RouterA-bgp peer 10.1.3.2 next-hop-localRouterA-bgp peer 10.1.4.2 as-number 65001RouterA-bgp peer 10.1.4.2 next-hop-localRouterA-bgp quit # 配置Router D。 system-viewRouterD bgp 65001RouterD-bgp router-id 4.4.4.4RouterD-bgp confederation id 200RouterD-bgp peer 10.1.3.1 as-number 65001RouterD-bgp peer 10.1.5.2 as-number 65001 RouterD-bgp quit# 配置Router E。 system-viewRouterE bgp 65001RouterE-bgp router-id 5.5.5.5RouterE-bgp confederation id 200RouterE-bgp peer 10.1.4.1 as-number 65001RouterE-bgp peer 10.1.5.1 as-number 65001 RouterE-bgp quit(4) 配置AS 100和AS 200之间的EBGP连接# 配置Router A。RouterA bgp 65001RouterA-bgp peer 200.1.1.2 as-number 100 RouterA-bgp quit# 配置Router F。 system-viewRouterF bgp 100RouterF-bgp router-id 6.6.6.6 RouterF-bgp peer 200.1.1.1 as-number 200 RouterF-bgp network 9.1.1.0 255.255.255.0RouterF-bgp quit(5) 查看配置结果# 查看RouterB的BGP路由表。RouterB display bgp routing-tableTotal Number of Routes: 1BGP Local router ID is 2.2.2.2Status codes: * - valid, - VPNv4 best, - best, d - damped,h - history, i - internal, s - suppressed, S - StaleOrigin : i - IGP, e - EGP, ? - incompleteNetwork NextHop MED LocPrf PrefVal Path/Ogn*i 9.1.1.0/24 10.1.1.1 0 100 0 (65001) 100iRouterB display bgp routing-table 9.1.1.0BGP local router ID : 2.2.2.2Local AS number : 65002Paths: 1 available, 1 bestBGP routing table entry information of 9.1.1.0/24:From : 10.1.1.1 (1.1.1.1)Relay Nexthop : 0.0.0.0Original nexthop: 10.1.1.1AS-path : (65001) 100Origin : igpAttribute value : MED 0, localpref 100, pref-val 0, pre 255State : valid, external-confed, best,Not advertised to any peers yet# 查看Router D的BGP路由表。RouterD display bgp routing-tableTotal Number of Routes: 1BGP Local router ID is 4.4.4.4Status codes: * - valid, - VPNv4 best, - best, d - damped,h - history, i - internal, s - suppressed, S - StaleOrigin : i - IGP, e - EGP, ? - incompleteNetwork NextHop MED LocPrf PrefVal Path/Ogn*i 9.1.1.0/24 10.1.3.1 0 100 0 100iRouterD display bgp routing-table 9.1.1.0BGP local router ID : 4.4.4.4Local AS number : 65001Paths: 1 available, 1 bestBGP routing table entry information of 9.1.1.0/24:From : 10.1.3.1 (1.1.1.1)Relay Nexthop : 0.0.0.0Original nexthop: 10.1.3.1AS-path : 100Origin : igpAttribute value : MED 0, localpref 100, pref-val 0, pre 255State : valid, internal, best,Not advertised to any peers yet通过以上显示信息可以看出：l Rout