操作步骤

1. 配置接口对。
   1. 配置接口GigabitEthernet 0/0/1。

      [HUAWEI] interface gigabitethernet 0/0/1[HUAWEI-GigabitEthernet0/0/1] undo portswitch[HUAWEI-GigabitEthernet0/0/1] ip address 10.1.10.2 24[HUAWEI-GigabitEthernet0/0/1] quit

   2. 配置接口GigabitEthernet 0/0/2。

      [HUAWEI] interface gigabitethernet 0/0/2[HUAWEI-GigabitEthernet0/0/2] undo portswitch[HUAWEI-GigabitEthernet0/0/2] ip address 10.2.10.2 24[HUAWEI-GigabitEthernet0/0/2] quit

2. 配置策略路由。
   1. 配置流分类。

      [HUAWEI] traffic classifier c1[HUAWEI-classifier-c1] if-match any[HUAWEI-classifier-c1] quit

   2. 配置下行流行为和流策略，指定下一跳地址为10.2.10.20。

      [HUAWEI] traffic behavior b1[HUAWEI-behavior-b1] redirect ip-nexthop 10.2.10.20[HUAWEI-behavior-b1] quit[HUAWEI] traffic policy p1[HUAWEI-trafficpolicy-p1] classifier c1 behavior b1[HUAWEI-trafficpolicy-p1] quit

   3. 配置上行流行为和流策略，指定下一跳地址为10.1.10.21。

      [HUAWEI] traffic behavior b2[HUAWEI-behavior-b2] redirect ip-nexthop 10.1.10.21[HUAWEI-behavior-b2] quit[HUAWEI] traffic policy p2[HUAWEI-trafficpolicy-p2] classifier c1 behavior b2[HUAWEI-trafficpolicy-p2] quit

   4. 在下行口GigabitEthernet0/0/47应用流策略。

      [HUAWEI] interface gigabitethernet 0/0/47[HUAWEI-GigabitEthernet0/0/47] traffic-policy p1 inbound[HUAWEI-GigabitEthernet0/0/47] quit[HUAWEI] quit

   5. 在上行口GigabitEthernet0/0/48应用流策略。

      [HUAWEI] interface gigabitethernet 0/0/48[HUAWEI-GigabitEthernet0/0/48] traffic-policy p2 inbound[HUAWEI-GigabitEthernet0/0/48] quit[HUAWEI] quit