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