Create a VLAN Trunk between Cisco CatOS and Cisco IOS

Due to the difference between the interfaces of Cisco’s CatOS and IOS, one needs to perform different commands to create a trunk.

Cisco CatOS Configuration

  • Go to Enable mode
    • cswitch> enable
  • Create Trunk
    • cswitch> set trunk {port to trunk on} on dot1q {vlans to allow}
    • EXAMPLE:
      • set trunk 6/5 on dot1q 2-3,10,20,30,69,96,99
      • This example sets port 6/5 to the 802.1q standard, and only allows VLANs 2-3,10,20,30,69,96, and 99 to go across it.

Cisco IOS Configuration

  • Go to Enable mode
    • iosswitch> enable
  • Go to Config Mode
    • iosswitch> config terminal
  • Go to Interface of the Trunk (i.e. GigabitEthernet 0/1)
    • iosswitch> interface GigabitEthernet0/1
  • Create the trunk on the interface
    • iosswitch> switchport trunk encapsulation dot1q
    • iosswitch> switchport mode trunk
  • Save the configuration
    • iosswitch> end

      iosswitch> write mem

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