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Hub-PE vpn in 团体值 = Spoke-PE的出团体值;vpn out 团体值 = Spoke-PE的入团体值。(所有Spoke-PE的出入团体值设为一致,便于扩展以及Hub-Spoke统一管理)
1.执行命令system-view,进入系统视图。
2.执行命令bgp { as-number-plain | as-number-dot },进入BGP视图。
3.执行命令peer ipv4-address as-number as-number,将对端PE配置为对等体。
4.执行命令peer ipv4-address connect-interface loopback interface-number,指定BGP建立TCP(Transmission Control Protocol)连接的接口。
PE之间必须使用32位掩码的Loopback接口地址来建立MP-IBGP对等体关系,以便能够迭代到隧道。以Loopback接口地址为目的地址的路由通过MPLS骨干网上的IGP发布给对端PE。
5.执行命令ipv4-family vpnv4 [ unicast ],进入BGP-VPNv4地址族视图。
6.执行命令peer ipv4-address enable,使能对等体交换VPN-IPv4路由信息的能力。
配置Hub-PE上的VPN实例 Hub-PE需配置两个VPN实例(VPN-in和VPN-out): - VPN-in用于接收并维护所有Spoke-PE发布的VPNv4路由。 - VPN-out用于维护Hub站点及所有Spoke站点的路由,并发布给所有Spoke-PE。 1.执行命令system-view,进入系统视图。 2.执行命令ip vpn-instance VPN-in,创建并进入VPN-in实例视图。 3.执行命令ipv4-family,使能VPN-in实例IPv4地址族,并进入VPN-in实例IPv4地址族视图。 4.执行命令route-distinguisher route-distinguisher,配置VPN-in实例IPv4地址族的RD。 5.执行命令vpn-target vpn-target1 &<1-8> import-extcommunity,为VPN-in实例IPv4地址族配置VPN-target扩展团体属性,使得该实例IPv4地址族可以接收所有Spoke-PE发布的VPNv4路由。 6.执行命令quit,退回VPN实例视图。 7.执行命令quit,退回系统视图。 8.执行命令ip vpn-instance VPN-out,创建并进入VPN-out实例视图。 9.执行命令ipv4-family,使能VPN-out实例IPv4地址族,并进入VPN-out实例IPv4地址族视图。 10.执行命令route-distinguisher route-distinguisher,配置VPN-out实例IPv4地址族的RD。 11.执行命令vpn-target vpn-target2 &<1-8> export-extcommunity,为VPN-out实例IPv4地址族配置VPN-target扩展团体属性,发布Hub站点及所有Spoke站点的路由。 配置Spoke-PE上的VPN实例 每个Spoke-PE上配置一个VPN实例。 1.执行命令system-view,进入系统视图。 2.执行命令ip vpn-instance vpn-instance-name,进入VPN-in的VPN实例视图。 3.执行命令ipv4-family,进入VPN实例IPv4地址族视图。 4.执行命令route-distinguisher route-distinguisher,配置VPN-in实例IPv4地址族的RD。 5.执行命令vpn-target vpn-target2 &<1-8> import-extcommunity,配置VPN-target扩展团体属性,使得该实例可以接收Hub-PE发布的VPNv4路由。 6.执行命令vpn-target vpn-target1 &<1-8> export-extcommunity,配置VPN-target扩展团体属性,发布本Spoke-PE所接入的站点的路由。
Hub-PE上需要使用两个接口或子接口:一个绑定VPN-in,用于接收Spoke-PE发来的路由;另一个绑定VPN-out,用于发布Hub站点及所有Spoke站点的路由。
在Hub-PE及所有Spoke-PE上进行如下配置。
1.执行命令system-view,进入系统视图。
2.执行命令interface interface-type interface-number,进入需要绑定VPN实例的接口视图。
3.(可选)对于以太网接口,执行命令undo portswitch,配置接口切换到三层模式。
缺省情况下,以太网接口处于二层模式。
4.执行命令ip binding vpn-instance vpn-instance-name,将当前接口与VPN实例绑定。
缺省情况下,接口不与任何VPN实例绑定,属于公网接口。
5.执行命令ip address ip-address { mask | mask-length },配置接口的IP地址。
1.执行命令system-view,进入系统视图。
2.执行命令bgp { as-number-plain | as-number-dot },进入BGP视图。
3.执行命令ipv4-family vpn-instance vpn-instance-name,进入BGP-VPN实例IPv4地址族视图。
4.执行命令peer { group-name | ipv4-address } allow-as-loop [ number ] [ global-as [ vpn-as ] ],允许路由环路。这里的number取1,允许AS重复1次的路由通过。
1.使用display ip routing-table vpn-instance vpn-instance-name命令在Hub-PE上查看VPN-in和VPN-out的路由信息。可以看到:VPN-in的路由表中有到所有Spoke站点的路由;VPN-out的路由有到Hub站点及到所有Spoke站点的路由。
2.使用display ip routing-table命令在Hub-CE和所有Spoke-CE上查看路由信息,Hub-CE和所有Spoke-CE上有到Hub站点和到所有Spoke站点的路由。
vpn in
vpn out
可以看到先去R1(HUB-CE)然后去R6
R1
# interface Ethernet0/0/1 ip address 21.1.1.1 255.255.255.0 # interface LoopBack0 ip address 1.1.1.1 255.255.255.0 # bgp 1 peer 12.1.1.2 as-number 100 peer 21.1.1.2 as-number 100 # ipv4-family unicast undo synchronization network 1.1.1.0 255.255.255.0 peer 12.1.1.2 enable peer 12.1.1.2 allow-as-loop peer 21.1.1.2 enable #
R2
# sysname R2 # ip vpn-instance in ipv4-family route-distinguisher 1:1 vpn-target 1:1 import-extcommunity # ip vpn-instance out ipv4-family route-distinguisher 2:2 vpn-target 2:2 export-extcommunity # mpls lsr-id 2.2.2.2 mpls # mpls ldp # interface Ethernet0/0/0 ip binding vpn-instance in ip address 12.1.1.2 255.255.255.0 # interface Ethernet0/0/1 ip address 23.1.1.1 255.255.255.0 mpls mpls ldp # interface GigabitEthernet0/0/0 ip binding vpn-instance out ip address 21.1.1.2 255.255.255.0 # interface LoopBack0 ip address 2.2.2.2 255.255.255.0 # bgp 100 peer 4.4.4.4 as-number 100 peer 4.4.4.4 connect-interface LoopBack0 peer 5.5.5.5 as-number 100 peer 5.5.5.5 connect-interface LoopBack0 # ipv4-family unicast undo synchronization peer 4.4.4.4 enable peer 4.4.4.4 reflect-client peer 4.4.4.4 next-hop-local peer 5.5.5.5 enable peer 5.5.5.5 reflect-client peer 5.5.5.5 next-hop-local # ipv4-family vpnv4 policy vpn-target peer 4.4.4.4 enable peer 4.4.4.4 reflect-client peer 4.4.4.4 next-hop-local peer 5.5.5.5 enable peer 5.5.5.5 reflect-client peer 5.5.5.5 next-hop-local # ipv4-family vpn-instance in peer 12.1.1.1 as-number 1 # ipv4-family vpn-instance out peer 21.1.1.1 as-number 1 peer 21.1.1.1 allow-as-loop 2 # ospf 1 router-id 2.2.2.2 area 0.0.0.0 network 23.1.1.0 0.0.0.255 network 2.2.2.2 0.0.0.0 #
R3
# sysname R3 # mpls lsr-id 3.3.3.3 mpls # mpls ldp # interface Ethernet0/0/0 ip address 23.1.1.2 255.255.255.0 mpls mpls ldp # interface Ethernet0/0/1 ip address 34.1.1.1 255.255.255.0 mpls mpls ldp # interface GigabitEthernet0/0/0 ip address 35.1.1.1 255.255.255.0 mpls mpls ldp # interface LoopBack0 ip address 3.3.3.3 255.255.255.0 # ospf 1 router-id 3.3.3.3 area 0.0.0.0 network 0.0.0.0 255.255.255.255 # route recursive-lookup tunnel #
R4
# sysname R4 # ip vpn-instance spoke ipv4-family route-distinguisher 1:1 vpn-target 1:1 export-extcommunity vpn-target 2:2 import-extcommunity # mpls lsr-id 4.4.4.4 mpls # mpls ldp # interface Ethernet0/0/0 ip address 34.1.1.2 255.255.255.0 mpls mpls ldp # interface Ethernet0/0/1 ip binding vpn-instance spoke ip address 46.1.1.1 255.255.255.0 # interface LoopBack0 ip address 4.4.4.4 255.255.255.0 # bgp 100 peer 2.2.2.2 as-number 100 peer 2.2.2.2 connect-interface LoopBack0 # ipv4-family unicast undo synchronization peer 2.2.2.2 enable peer 2.2.2.2 next-hop-local # ipv4-family vpnv4 policy vpn-target peer 2.2.2.2 enable peer 2.2.2.2 next-hop-local # ipv4-family vpn-instance spoke peer 46.1.1.2 as-number 1 # ospf 1 router-id 4.4.4.4 area 0.0.0.0 network 34.1.1.0 0.0.0.255 network 4.4.4.4 0.0.0.0 # route recursive-lookup tunnel #
R5
# sysname R5 # ip vpn-instance spoke ipv4-family route-distinguisher 1:1 vpn-target 1:1 export-extcommunity vpn-target 2:2 import-extcommunity # mpls lsr-id 5.5.5.5 mpls # mpls ldp # interface Ethernet0/0/0 ip address 35.1.1.2 255.255.255.0 mpls mpls ldp # interface Ethernet0/0/1 ip binding vpn-instance spoke ip address 57.1.1.1 255.255.255.0 # interface LoopBack0 ip address 5.5.5.5 255.255.255.0 # bgp 100 peer 2.2.2.2 as-number 100 peer 2.2.2.2 connect-interface LoopBack0 # ipv4-family unicast undo synchronization peer 2.2.2.2 enable peer 2.2.2.2 next-hop-local # ipv4-family vpnv4 policy vpn-target peer 2.2.2.2 enable peer 2.2.2.2 next-hop-local # ipv4-family vpn-instance spoke peer 57.1.1.2 as-number 1 # ospf 1 router-id 5.5.5.5 area 0.0.0.0 network 35.1.1.0 0.0.0.255 network 5.5.5.5 0.0.0.0 # route recursive-lookup tunnel #
R6
#
sysname R6
#
interface LoopBack0
ip address 6.6.6.6 255.255.255.0
#
bgp 1
peer 46.1.1.1 as-number 100
#
ipv4-family unicast
undo synchronization
network 6.6.6.0 255.255.255.0
peer 46.1.1.1 enable
peer 46.1.1.1 allow-as-loop 2
#
R7
# sysname R7 # interface Ethernet0/0/0 ip address 57.1.1.2 255.255.255.0 # interface LoopBack0 ip address 7.7.7.7 255.255.255.0 # bgp 1 peer 57.1.1.1 as-number 100 # ipv4-family unicast undo synchronization network 7.7.7.0 255.255.255.0 peer 57.1.1.1 enable peer 57.1.1.1 allow-as-loop 2 #
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