SwitchA和SwitchB通过以太链路分别都连接VLAN10和VLAN20的网络，且SwitchA和SwitchB之间有较大的数据流量。

用户希望SwitchA和SwitchB之间能够提供较大的链路带宽来使相同VLAN间互相通信。同时用户也希望能够提供一定的冗余度，保证数据传输和链路的可靠性。

配置文件

• SwitchA的配置文件

  #
  sysname SwitchA
  #
  vlan batch 10 20
  # 
  interface Eth-Trunk1
   port link-type trunk 
   port trunk allow-pass vlan 10 20
   load-balance src-dst-mac 
  # 
  interface GigabitEthernet0/0/1 
   eth-trunk 1
  # 
  interface GigabitEthernet0/0/2 
   eth-trunk 1
  # 
  interface GigabitEthernet0/0/3 
   eth-trunk 1
  #
  interface GigabitEthernet0/0/4 
   port link-type trunk 
   port trunk allow-pass vlan 10
  #
  interface GigabitEthernet0/0/5 
   port link-type trunk 
   port trunk allow-pass vlan 20
  #
  return

• SwitchB的配置文件

  #
  sysname SwitchB
  #
  vlan batch 10 20
  # 
  interface Eth-Trunk1
   port link-type trunk 
   port trunk allow-pass vlan 10 20
   load-balance src-dst-mac 
  # 
  interface GigabitEthernet0/0/1 
   eth-trunk 1
  # 
  interface GigabitEthernet0/0/2 
   eth-trunk 1
  # 
  interface GigabitEthernet0/0/3 
   eth-trunk 1
  #
  interface GigabitEthernet0/0/4 
   port link-type trunk 
   port trunk allow-pass vlan 10
  #
  interface GigabitEthernet0/0/5 
   port link-type trunk 
   port trunk allow-pass vlan 20
  #
  return