MPLS vpn OPTION B配置原理及数据通信分析

MPLS vpn OPTION B配置原理及数据通信分析

一、ISP内部IGP全互通

R1： ospf 1 router-id 1.1.1.1 area 0.0.0.0 network 1.1.1.1 0.0.0.0 network 12.1.1.1 0.0.0.0 R2： ospf 1 router-id 2.2.2.2 area 0.0.0.0 network 2.2.2.2 0.0.0.0 network 12.1.1.2 0.0.0.0 network 23.1.1.2 0.0.0.0 network 24.1.1.2 0.0.0.0 R3： ospf 1 router-id 3.3.3.3 area 0.0.0.0 network 3.3.3.3 0.0.0.0 network 23.1.1.3 0.0.0.0 R4： ospf 1 router-id 4.4.4.4 area 0.0.0.0 network 4.4.4.4 0.0.0.0 network 24.1.1.4 0.0.0.0

R5： ospf 1 router-id 5.5.5.5 area 0.0.0.0 network 5.5.5.5 0.0.0.0 network 56.1.1.5 0.0.0.0 R6： ospf 1 router-id 6.6.6.6 area 0.0.0.0 network 6.6.6.6 0.0.0.0 network 56.1.1.6 0.0.0.0 network 67.1.1.6 0.0.0.0 network 68.1.1.6 0.0.0.0 R7： ospf 1 router-id 7.7.7.7 area 0.0.0.0 network 7.7.7.7 0.0.0.0 network 67.1.1.7 0.0.0.0 R8： ospf 1 router-id 8.8.8.8 area 0.0.0.0 network 8.8.8.8 0.0.0.0 network 68.1.1.8 0.0.0.0

R1： mpls lsr-id 1.1.1.1 mpls mpls ldp int g0/0/0 mpls mpls ldp R2： mpls lsr-id 2.2.2.2 mpls mpls ldp int g0/0/0 mpls mpls ldp int g0/0/1 mpls mpls ldp int g0/0/2 mpls mpls ldp R3： mpls lsr-id 3.3.3.3 mpls mpls ldp int g0/0/0 mpls mpls ldp R4： mpls lsr-id 4.4.4.4 mpls mpls ldp int g0/0/0 mpls mpls ldp

R5： mpls lsr-id 5.5.5.5 mpls mpls ldp int g0/0/0 mpls mpls ldp R6： mpls lsr-id 6.6.6.6 mpls mpls ldp int g0/0/0 mpls mpls ldp int g0/0/1 mpls mpls ldp int g0/0/2 mpls mpls ldp R7： mpls lsr-id 7.7.7.7 mpls mpls ldp int g0/0/0 mpls mpls ldp R8： mpls lsr-id 8.8.8.8 mpls mpls ldp int g0/0/0 mpls mpls ldp

R3： interface GigabitEthernet0/0/1 mpls R5： interface GigabitEthernet0/0/1 mpls

三、ISP内部建立MP-IBGP邻居，ISP之间建立MP-EBGP邻居，用于传递将来的vpnv4路由3.1、R1与R4、R3与R4建立MP-IBGP邻居关系，R1与R3是反射器R4的客户端，R4采用按组打包方式与R1、R3建立邻居关系：

R1： bgp 100 undo default ipv4-unicast peer 4.4.4.4 as-number 100 peer 4.4.4.4 connect-interface LoopBack0 ipv4-family unicast undo synchronization undo peer 4.4.4.4 enable ipv4-family vpnv4 policy vpn-target peer 4.4.4.4 enable R3： bgp 100 undo default ipv4-unicast peer 4.4.4.4 as-number 100 peer 4.4.4.4 connect-interface LoopBack0 ipv4-family unicast undo synchronization undo peer 4.4.4.4 enable ipv4-family vpnv4 undo policy vpn-target peer 4.4.4.4 enable

#因为R3上不需要创建VRF实例，所以不存在RT值，使用undo policy vpn-target保证可以收发vpnv4路由

R4： bgp 100 undo default ipv4-unicast peer 1.1.1.1 as-number 100 peer 3.3.3.3 as-number 100 group ibgp internal peer ibgp connect-interface LoopBack0 ipv4-family unicast undo synchronization undo peer ibgp enable undo peer 1.1.1.1 enable undo peer 3.3.3.3 enable ipv4-family vpnv4 undo policy vpn-target peer ibgp enable peer ibgp reflect-client peer 1.1.1.1 enable peer 1.1.1.1 group ibgp peer 3.3.3.3 enable peer 3.3.3.3 group ibgp

R5： bgp 200 undo default ipv4-unicast peer 8.8.8.8 as-number 200 peer 8.8.8.8 connect-interface LoopBack0 ipv4-family unicast undo synchronization undo peer 8.8.8.8 enable ipv4-family vpnv4 undo policy vpn-target peer 8.8.8.8 enable

#因为R5上不需要创建VRF实例，所以不存在RT值，使用undo policy vpn-target保证可以收发vpnv4路由

R7： bgp 200 undo default ipv4-unicast peer 8.8.8.8 as-number 200 peer 8.8.8.8 connect-interface LoopBack0 ipv4-family unicast undo synchronization undo peer 8.8.8.8 enable ipv4-family vpnv4 policy vpn-target peer 8.8.8.8 enable R8： bgp 200 undo default ipv4-unicast peer 5.5.5.5 as-number 200 peer 7.7.7.7 as-number 200 group ibgp internal peer ibgp connect-interface LoopBack0 ipv4-family unicast undo synchronization undo peer ibgp enable undo peer 5.5.5.5 enable undo peer 7.7.7.7 enable ipv4-family vpnv4 undo policy vpn-target peer ibgp enable peer ibgp reflect-client peer 5.5.5.5 enable peer 5.5.5.5 group ibgp peer 7.7.7.7 enable peer 7.7.7.7 group ibgp

R3： bgp 100 undo default ipv4-unicast peer 35.1.1.5 as-number 200 ipv4-family unicast undo synchronization undo peer 35.1.1.5 enable ipv4-family vpnv4 undo policy vpn-target peer 35.1.1.5 enable R5： bgp 200 undo default ipv4-unicast peer 35.1.1.3 as-number 100 ipv4-family unicast undo synchronization undo peer 35.1.1.3 enable ipv4-family vpnv4 undo policy vpn-target peer 35.1.1.3 enable

R1： ip vpn-instance 9 ipv4-family route-distinguisher 1:1 vpn-target 9:10 export-extcommunity vpn-target 10:9 import-extcommunity interface GigabitEthernet0/0/1 ip binding vpn-instance 9 ip address 192.168.1.1 255.255.255.0 bgp 100 ipv4-family vpn-instance 9 peer 192.168.1.9 as-number 9 R9： bgp 9 peer 192.168.1.1 as-number 100 ipv4-family unicast undo synchronization peer 192.168.1.1 enable

R7： ip vpn-instance 10 ipv4-family route-distinguisher 7:7 vpn-target 10:9 export-extcommunity vpn-target 9:10 import-extcommunity interface GigabitEthernet0/0/1 ip binding vpn-instance 10 ip address 192.168.7.7 255.255.255.0 bgp 200 ipv4-family vpn-instance 10 peer 192.168.7.10 as-number 10 R10： bgp 10 peer 192.168.7.7 as-number 200 ipv4-family unicast undo synchronization peer 192.168.7.7 enable

R9： bgp 9 network 192.168.9.9 255.255.255.255 R10： bgp 10 network 192.168.10.10 255.255.255.255

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