Huawei Router Configuration for Automatic ISP Traffic Separation and Failover

Purpose: The router automatically distinguishes China Unicom traffic from China Telecom traffic, directs visits to Unicom sites via the Unicom line and Telecom sites via the Telecom line, and switches all traffic to the Telecom line if the Unicom line fails, ensuring uninterrupted network access.

[Huawei]interface Ethernet1/0

[Huawei-Ethernet1/0]ip address 221.208.250.54 255.255.255.248

[Huawei]interface ethernet2/0

[Huawei-Ethernet2/0]ip address 219.147.130.240 255.255.255.248

[Huawei]interface Ethernet3/0

[Huawei-Ethernet3/0]ip address 192.168.1.1 255.255.255.0

[Huawei]acl number 2000

[Huawei-acl-adv-3100]rule 0 permit source 192.168.0.0 0.0.0.255

[Huawei]interface Ethernet1/0

[Huawei-Ethernet1/0]nat outbound 2000

[Huawei]interface ethernet2/0

[Huawei-Ethernet2/0]nat outbound 2000

Define the destination address ranges for Unicom and apply policy routing to the LAN interface.

[Huawei]acl number3100

[Huawei-acl-adv-3100]rule 0 permit ip destination 60.0.0.0 0.7.255.255

... (rules 1 through 95 omitted for brevity, each wrapped in <code> tags) ...

[Huawei]route-policy auto permit node 1

[Huawei-route-policy]if-match acl 3100

[Huawei-route-policy]apply ip-address next-hop 221.208.250.53

[Huawei]interface Ethernet3/0

[Huawei-Ethernet3/0]ip policy route-policy auto

Configure the default route to use the Telecom gateway.

ip route-static 0.0.0.0 0.0.0.0 219.147.130.239 preference 60