Packet type-based interface PBR configuration example

As shown in Figure 73, configure PBR on Switch A to forward all TCP packets received on VLAN-interface 11 to the next hop 1.1.2.2. Switch A forwards other packets according to the routing table.

1. Configure Switch A:

   # Create VLAN 10 and VLAN 20.

   <SwitchA> system-view
   [SwitchA] vlan 10
   [SwitchA-vlan10] quit
   [SwitchA] vlan 20
   [SwitchA-vlan20] quit
   

   # Configure the IP addresses of VLAN-interface 10 and VLAN-interface 20.

   [SwitchA] interface vlan-interface 10
   [SwitchA-Vlan-interface10] ip address 1.1.2.1 24
   [SwitchA-Vlan-interface10] quit
   [SwitchA] interface vlan-interface 20
   [SwitchA-Vlan-interface20] ip address 1.1.3.1 24
   [SwitchA-Vlan-interface20] quit
   

   # Configure ACL 3101 to match TCP packets.

   [SwitchA] acl number 3101
   [SwitchA-acl-adv-3101] rule permit tcp
   [SwitchA-acl-adv-3101] quit
   

   # Configure Node 5 for policy aaa to forward TCP packets to next hop 1.1.2.2.

   [SwitchA] policy-based-route aaa permit node 5
   [SwitchA-pbr-aaa-5] if-match acl 3101
   [SwitchA-pbr-aaa-5] apply next-hop 1.1.2.2
   [SwitchA-pbr-aaa-5] quit
   

   # Configure interface PBR by applying policy aaa to VLAN-interface 11.

   [SwitchA] interface vlan-interface 11
   [SwitchA-Vlan-interface11] ip address 10.110.0.10 24
   [SwitchA-Vlan-interface11] ip policy-based-route aaa
   [SwitchA-Vlan-interface11] quit
   

2. Configure Switch B:

   # Create VLAN 10.

   <SwitchB> system-view
   [SwitchB] vlan 10
   [SwitchB-vlan10] quit
   

   # Configure the IP address of VLAN-interface 10.

   [SwitchB] interface vlan-interface 10
   [SwitchB-Vlan-interface10] ip address 1.1.2.2 24
   [SwitchB-Vlan-interface10] quit
   

   # Configure a static route to subnet 10.110.0.0/24.

   [SwitchB] ip route-static 10.110.0.0 24 1.1.2.1
   

3. Configure Switch C:

   # Create VLAN 20.

   <SwitchC> system-view
   [SwitchC] vlan 20
   [SwitchC-vlan20] quit
   

   # Configure the IP address of VLAN-interface 20.

   [SwitchC] interface vlan-interface 20
   [SwitchC-Vlan-interface20] ip address 1.1.3.2 24
   [SwitchC-Vlan-interface20] quit
   

   # Configure a static route to subnet 10.110.0.0/24.

   [SwitchC] ip route-static 10.110.0.0 24 1.1.3.1
   

# Configure the IP address 10.110.0.20/24 for Host A, and specify its gateway address as 10.110.0.10.

# On Host A, Telnet to Switch B that is directly connected to Switch A. The operation succeeds.

# On Host A, Telnet to Switch C that is directly connected to Switch A. The operation fails.

# Ping Switch C from Host A. The operation succeeds.

Telnet uses TCP and ping uses ICMP. The preceding results show that all TCP packets arriving on VLAN-interface 11 of Switch A are forwarded to next hop 1.1.2.2, and other packets are forwarded through VLAN-interface 20. The interface PBR configuration is effective.