A Few Easy Steps: Cisco Router, Setup Interface as Dot1q Trunk

In this session of A Few Easy Steps, we will show the routing table on a Cisco Router. In General this will work on any Cisco IOS Router.

Session Prerequisites:

  • You have terminal or console access to your Cisco device.

Session Assumptions:

  • Routing is configured on device
  • VLAN 1 will be Native
  • The Network for VLAN 1 will be 192.168.1.0 /24
  • The Network for VLAN 2 will be 192.168.2.0 /24
  • The Network for VLAN 3 will be 192.168.3.0 /24
  • Interface FastEthernet 0/0 will be our Trunk Interface

Our goals of this session are:

  • Setup Primary Interface
  • Setup VLAN 1 Sub-Interface
  • Setup VLAN 2 Sub-Interface
  • Setup VLAN 3 Sub-Interface

Setup Primary Interface

conf t
!
interface fastEthernet 0/0
!
description Trunk_to_SW1
!
no shut
!
end
!
copy running-config startup-config

Setup VLAN 1 Sub-Interface

conf t
!
interface fastEthernet 0/0.1
!
encapsulation dot1Q 1 native
!
ip address 192.168.1.1 255.255.255.0
!
no shut
!
end
!
copy running-config startup-config

Setup VLAN 2 Sub-Interface

conf t
!
interface fastEthernet 0/0.2
!
encapsulation dot1Q 2
!
ip address 192.168.2.1 255.255.255.0
!
no shut
!
end
!
copy running-config startup-config

Setup VLAN 3 Sub-Interface

conf t
!
interface fastEthernet 0/0.3
!
encapsulation dot1Q 3
!
ip address 192.168.3.1 255.255.255.0
!
no shut
!
end
!
copy running-config startup-config

Entire Config:

conf t
!
interface fastEthernet 0/0
!
description Trunk_to_SW1
!
no shut
!
interface fastEthernet 0/0.1
!
encapsulation dot1Q 1 native
!
ip address 192.168.1.1 255.255.255.0
!
no shut
!
interface fastEthernet 0/0.2
!
encapsulation dot1Q 2
!
ip address 192.168.2.1 255.255.255.0
!
no shut
!
interface fastEthernet 0/0.3
!
encapsulation dot1Q 3
!
ip address 192.168.3.1 255.255.255.0
!
no shut
!
end
!
copy running-config startup-config


Find out more about Dot1Q Trunks on a Cisco Router here. or Check out this Search at NetworkSuperSearch.com.

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