华为设备配置IP和虚拟专用网混合FRR

1. 配置接口IP地址
   [PE1-LoopBack1]ip add 1.1.1.1 32
   [PE1-GigabitEthernet0/0/0]ip add 10.3.1.1 24
   [PE2-LoopBack1]ip add 2.2.2.2 32
   [PE2-GigabitEthernet0/0/0]ip add 10.3.1.2 24
   [CE-GigabitEthernet0/0/0]ip add 10.1.1.3 24
   [CE-GigabitEthernet0/0/1]ip add 10.2.1.3 24
   [CE-GigabitEthernet0/0/2]ip add 10.5.1.3 24

2. 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 10.3.1.0 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 10.3.1.0 0.0.0.255

3. 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
   [PE2]mpls lsr-id 2.2.2.2
   [PE2]mpls
   [PE2]mpls ldp
   [PE2-GigabitEthernet0/0/0]mpls
   [PE2-GigabitEthernet0/0/0]mpls ldp
   

4. 在PE设备上配置VPN实例，将CE接入PE
   [PE1]ip -instance 1
   [PE1--instance-1]ipv4-family
   [PE1--instance-1-af-ipv4]route-distinguisher 100:1
   [PE1--instance-1-af-ipv4]-target 1:1
   [PE1-GigabitEthernet0/0/1]ip binding -instance 1
   [PE1-GigabitEthernet0/0/1]ip add 10.1.1.1 24
   [PE2]ip -instance 1
   [PE2--instance-1]ipv4-family
   100:2
   [PE2--instance-1-af-ipv4]-target 1:1
   [PE2-GigabitEthernet0/0/1]ip binding -instance 1
   [PE2-GigabitEthernet0/0/1]ip add 10.2.1.2 24

5. CE和PE之间配置静态路由。在PE1和PE2上引入直连VPN路由和静态路由
   [PE1]ip route-static -instance 1 10.1.5.0 24 g0/0/1 10.1.1.3
   [PE1]bgp 100
   [PE1-bgp]ipv4-family -instance 1
   [PE1-bgp-1]import-route direct
   [PE1-bgp-1]import-route static
   [PE2]ip route-static -instance 1 10.5.1.0 24 g0/0/1 10.2.1.3
   [PE2]bgp 100
   [PE2-bgp]ipv4-family -instance 1
   [PE2-bgp-1]import-route direct
   [PE2-bgp-1]import-route static
   [CE]ip route-static 0.0.0.0 0.0.0.0 10.1.1.1 preference 60
   [CE]ip route-static 0.0.0.0 0.0.0.0 10.2.1.2 preference 100

6. 在PE之间建立BGP VPNv4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]ipv4-family v4
   [PE1-bgp-af-v4]peer 2.2.2.2 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 v4
   [PE2-bgp-af-v4]peer 1.1.1.1 enable

7. 配置混合FRR路由策略
   [PE1]ip ip-prefix f1 permit 10.1.1.3 32
   [PE1]route-policy f1 permit node 10
   [PE1-route-policy]if-match ip next-hop ip-prefix f1
   [PE1-route-policy]apply backup-nexthop 2.2.2.2

8. 使能IP FRR
   [PE1]ip -instance 1
   [PE1--instance-1]ipv4-family
   [PE1--instance-1-af-ipv4]ip frr route-policy f1