华为设备配置虚拟专用网FRR

配置IP地址

[PE1-LoopBack1]ip add 1.1.1.1 32

[PE1-GigabitEthernet0/0/0]ip add 20.1.1.1 24

[PE1-GigabitEthernet0/0/1]ip add 30.1.1.1 24

[PE2-LoopBack1]ip add 2.2.2.2 32

[PE2-GigabitEthernet0/0/0]ip add 20.1.1.2 24

[PE2-GigabitEthernet0/0/1]ip add 10.1.1.2 24

[PE3-LoopBack1]ip add 3.3.3.3 32

[PE3-GigabitEthernet0/0/0]ip add 30.1.1.3 24

[PE3-GigabitEthernet0/0/1]ip add 10.2.1.3 24

[CE1-GigabitEthernet0/0/0]ip add 10.1.1.4 24

[CE1-GigabitEthernet0/0/1]ip add 10.2.1.4 24

[CE1-GigabitEthernet0/0/2]ip add 10.3.1.4 24

在MPLS骨干网上配置OSPF协议，实现骨干网PE互通

[PE1]ospf 1

[PE1-ospf-1]area 0

[PE1-ospf-1-area-0.0.0.0]network 1.1.1.1 0.0.0.0

[PE1-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255

[PE1-ospf-1-area-0.0.0.0]network 30.1.1.0 0.0.0.255

[PE2]ospf 1

[PE2-ospf-1]area 0

[PE2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0

[PE2-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255

[PE3]ospf 1

[PE3-ospf-1]area 0

[PE3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0

[PE3-ospf-1-area-0.0.0.0]network 30.1.1.0 0.0.0.255

在MPLS骨干网上配置MPLS基本能力和MPLS LDP，建立LDP LSP

[PE1]mpls lsr-id 1.1.1.1

[PE1]mpls

[PE1]mpls ldp

[PE1-GigabitEthernet0/0/0]mpls

[PE1-GigabitEthernet0/0/0]mpls ldp

[PE1-GigabitEthernet0/0/1]mpls

[PE1-GigabitEthernet0/0/1]mpls ldp

[PE2]mpls lsr-id 2.2.2.2

[PE2]mpls

[PE2]mpls ldp

[PE2-GigabitEthernet0/0/0]mpls

[PE2-GigabitEthernet0/0/0]mpls ldp

[PE3]mpls lsr-id 3.3.3.3

[PE3]mpls

[PE3]mpls ldp

[PE3-GigabitEthernet0/0/0]mpls

[PE3-GigabitEthernet0/0/0]mpls ldp

在PE设备上配置VPN实例，将CE接入PE

[PE1]ip vpn-instance vpn1

[PE1-vpn-instance-vpn1]ipv4-family

[PE1-vpn-instance-vpn1-af-ipv4]route-distinguisher 100:1

[PE1-vpn-instance-vpn1-af-ipv4]vpn-target 1:1

[PE2]ip vpn-instance vpn1

[PE2-vpn-instance-vpn1]ipv4-family

[PE2-vpn-instance-vpn1-af-ipv4]route-distinguisher 100:2

[PE2-vpn-instance-vpn1-af-ipv4]vpn-target 1:1

[PE2-GigabitEthernet0/0/1]ip binding vpn-instance vpn1

[PE2-GigabitEthernet0/0/1]ip add 10.1.1.2 24

[PE3]ip vpn-instance vpn1

[PE3-vpn-instance-vpn1]ipv4-family

[PE3-vpn-instance-vpn1]route-distinguisher 100:3

[PE3-vpn-instance-vpn1]vpn-target 1:1

[PE3-GigabitEthernet0/0/1]ip binding vpn-instance vpn1

[PE3-GigabitEthernet0/0/1]ip add 10.2.1.3 24

在PE1上引入直连VPN路由；在PE2与CE1，及PE3与CE1之间建立EBGP对等体，引入VPN路由

[PE1]bgp 100

[PE1-bgp]ipv4-family vpn-instance vpn1

[PE1-bgp-vpn1]import-route direct

[PE2]bgp 100

[PE2-bgp]ipv4-family vpn-instance vpn1

[PE2-bgp-vpn1]peer 10.1.1.4 as-number 65410

[PE2-bgp-vpn1]import-route direct

[PE3]bgp 100

[PE3-bgp]ipv4-family vpn-instance vpn1

[PE3-bgp-vpn1]peer 10.2.1.4 as-number 65410

[PE3-bgp-vpn1]import-route direct

[CE1]bgp 65410

[CE1-bgp]peer 10.1.1.2 as-number 100

[CE1-bgp]peer 10.2.1.3 as-number 100

[CE1-bgp]import-route direct

[CE1-bgp]network 10.3.1.0 24

在PE之间建立MP-IBGP对等体

[PE1]bgp 100

[PE1-bgp]peer 2.2.2.2 as-number 100

[PE1-bgp]peer 2.2.2.2 connect-interface LoopBack 1

[PE1-bgp]peer 3.3.3.3 as-number 100

[PE1-bgp]peer 3.3.3.3 connect-interface LoopBack 1

[PE1-bgp]ipv4-family vpnv4

[PE1-bgp-af-vpnv4]peer 2.2.2.2 enable

[PE1-bgp-af-vpnv4]peer 3.3.3.3 enable

[PE2]bgp 100

[PE2-bgp]peer 1.1.1.1 as-number 100

[PE2-bgp]peer 1.1.1.1 connect-interface LoopBack 1

[PE2-bgp]ipv4-family vpnv4

[PE2-bgp-af-vpnv4]peer 1.1.1.1 enable

[PE3]bgp 100

[PE3-bgp]peer 1.1.1.1 as-number 100

[PE3-bgp]peer 1.1.1.1 connect-interface LoopBack 1

[PE3-bgp]ipv4-family vpnv4

[PE3-bgp-af-vpnv4]peer 1.1.1.1 enable

配置VPN FRR路由策略: 在PE1上配置备份下一跳，使PE3为PE2的备份，PE2出现故障时可以快速切换到PE3上

[PE1]ip ip-prefix v1 permit 2.2.2.2 32

[PE1]route-policy v1 permit node 10

[PE1-route-policy]if-match ip next-hop ip-prefix v1

[PE1-route-policy]apply backup-nexthop 3.3.3.3

使能VPN FRR

[PE1]ip vpn-instance vpn1

[PE1-vpn-instance-vpn1]vpn frr route-policy v1