本文解决核心问题是单一CE节点到PE节点指定VRF的BGP建邻居。
整体网络拓扑上图所示，PE汇聚路由已与边缘客户路由建邻，指派10.10.10.0/24网段。重点：其中PE端上与CE端互联的端口必须已指定到创建好的vrf或netns上，该工作需要LinuxShell中执行iproute2命令。
1.PE
汇聚路由BGP设置入下图所示
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router bgp 100 bgp router-id 10.10.20.2 ! router bgp 100 vrf vrf1 bgp router-id 10.10.10.1 neighbor 10.10.10.2 remote-as 50 ! address-family ipv4 unicast rd vpn export 100:10 rt vpn both 100:10 exit-address-family ! |
2.CE
边缘路由BGP设置入下图所示
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router bgp 50 bgp router-id 10.10.10.2 network 192.168.1.0/24 neighbor 10.10.10.1 remote-as 100 ! |
3.查询BGP联通
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#通过如下命令，确认BGP建立连接状态;其中00:19:34后面的数字1,代表接收的路由条目； $show ip bgp vrf vrf1 summary IPv4 Unicast Summary: BGP router identifier 10.10.10.1, local AS number 100 vrf-id 1 BGP table version 1 RIB entries 1, using 184 bytes of memory Peers 1, using 20 KiB of memory Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.10.10.2 4 50 24 23 0 0 0 00:19:34 1 Total number of neighbors 1 |
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#通过如下命令，确定转发到vrf1中的路由 $show ip bgp vrf vrf1 BGP table version is 1, local router ID is 10.10.10.1, vrf id 1 Default local pref 100, local AS 100 Status codes: s suppressed, d damped, h history, * valid, > best, = multipath, i internal, r RIB-failure, S Stale, R Removed Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path *> 192.168.1.0/24 10.10.10.2 0 0 50 i Displayed 1 routes and 1 total paths |
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