Example for Configuring VLAN Aggregation

Procedure

1. Configure VLANs and interfaces on SwitchA and SwitchB, add PCs from different departments to different VLANs, and configure interfaces to transparently transmit packets from VLANs to SwitchB.

   1. Configure SwitchA.

      # Configure GE1/0/1 as an access interface. The configurations of GE1/0/2, GE1/0/3, and GE1/0/4 are similar to the configuration of GE1/0/1, and are not mentioned here.

      <HUAWEI> system-view
      [HUAWEI] sysname SwitchA
      [SwitchA] interface gigabitethernet 1/0/1
      [SwitchA-GigabitEthernet1/0/1] port link-type access
      [SwitchA-GigabitEthernet1/0/1] quit

      # Create VLAN 2 and add GE1/0/1 and GE1/0/2 to VLAN 2.

      [SwitchA] vlan 2
      [SwitchA-vlan2] port gigabitethernet 1/0/1 1/0/2
      [SwitchA-vlan2] quit
      

      # Create VLAN 3 and add GE1/0/3 and GE1/0/4 to VLAN 3.

      [SwitchA] vlan 3
      [SwitchA-vlan3] port gigabitethernet 1/0/3 1/0/4
      [SwitchA-vlan3] quit
      

      # Configure the interface of SwitchA connected to SwitchB to transparently transmit packets from VLAN 2 and VLAN 3 to SwitchB.

      [SwitchA] interface gigabitethernet 1/0/5
      [SwitchA-GigabitEthernet1/0/5] port link-type trunk
      [SwitchA-GigabitEthernet1/0/5] port trunk allow-pass vlan 2 3
      [SwitchA-GigabitEthernet1/0/5] quit

   2. Configure SwitchB.

      # Create VLAN 2, VLAN 3, VLAN 4, and VLAN 10 and configure the interface of SwitchB connected to SwitchA to transparently transmit packets from VLAN 2 and VLAN 3 to SwitchB.

      <HUAWEI> system-view
      [HUAWEI] sysname SwitchB
      [SwitchB] vlan batch 2 3 4 10
      [SwitchB] interface gigabitethernet 1/0/5
      [SwitchB-GigabitEthernet1/0/5] port link-type trunk
      [SwitchB-GigabitEthernet1/0/5] port trunk allow-pass vlan 2 3
      [SwitchB-GigabitEthernet1/0/5] quit

2. Configure a super-VLAN and a VLANIF interface corresponding to the super-VLAN.

   # Configure super-VLAN 4 on SwitchB and add VLAN 2 and VLAN 3 to super-VLAN 4 as sub-VLANs.

   [SwitchB] vlan 4
   [SwitchB-vlan4] aggregate-vlan
   [SwitchB-vlan4] access-vlan 2 to 3
   [SwitchB-vlan4] quit
   

   # Create and configure VLANIF 4 so that PCs in different departments can access the Internet using super-VLAN 4.

   [SwitchB] interface vlanif 4
   [SwitchB-Vlanif4] ip address 10.1.1.1 255.255.255.0
   [SwitchB-Vlanif4] quit
   

3. Configure a static route.

   # Configure the uplink interface GE1/0/1 on SwitchB to transparently transmit packets from the VLAN that SwitchB and router belong to.

   [SwitchB] interface gigabitethernet 1/0/1
   [SwitchB-GigabitEthernet1/0/1] port link-type trunk
   [SwitchB-GigabitEthernet1/0/1] port trunk allow-pass vlan 10
   [SwitchB-GigabitEthernet1/0/1] quit

   # Create and configure VLANIF 10 and specify the IP address of VLANIF 10 as the IP address for connecting SwitchB and the router (egress gateway).

   [SwitchB] interface vlanif 10
   [SwitchB-Vlanif10] ip address 10.10.1.1 255.255.255.0
   [SwitchB-Vlanif10] quit
   

   # Configure a static route to the router on SwitchB so that PCs can access the Internet.

   [SwitchB] ip route-static 0.0.0.0 0.0.0.0 10.10.1.2

   Configure the router interface connected to SwitchB and assign the IP address of 10.10.1.2 to the router interface. See the router configuration manual.

4. Assign IP addresses to PCs.

   Configure an IP address for each PC and make the PCs reside on the same network segment as VLAN 4.

   After the configuration is complete, PCs in each department can access the Internet, and PCs in VLAN 2 and VLAN 3 cannot ping each other.

5. Configure proxy ARP.

   # Configure proxy ARP in super-VLAN 4 on SwitchB so that PCs in different departments can communicate at Layer 3.

   [SwitchB] interface vlanif 4 
   [SwitchB-Vlanif4] arp-proxy inter-sub-vlan-proxy enable
   [SwitchB-Vlanif4] quit

6. Verify the configuration.

   After the configuration is complete, PCs in VLAN 2 and VLAN 3 can ping each other and access the Internet.