Configuring VLAN Trunks

Configuring an Ethernet Interface as a Trunk Port

DETAILED STEPS

 

Command or Action

Purpose

Step 1

configure terminal

Enters the global configuration mode.

Example:

Switch# configure terminal

Step 2

interface interface-id

Specifies the port to be configured, and enters interface

 

 

configuration mode.

 

Example:

 

 

Switch(config)# interface

 

 

gigabitethernet1/0/1

 

Step 3

switchport mode trunk

Configures the interface as a VLAN trunk port.

 

Example:

 

 

Switch(config-if)#switchport mode trunk

 

Step 4

switchport trunk allowed vlan {add all except

 

none remove} vlan-list

Example:

Switch(config-if)# switchport trunk allowed vlan remove 2

(Optional) Configures the list of VLANs allowed on the trunk.

The vlan-listparameter is either a single VLAN number from 1 to 4094 or a range of VLANs described by two VLAN numbers, the lower one first, separated by a hyphen. Do not enter any spaces between comma-separated VLAN parameters or in hyphen-specified ranges.

All VLANs are allowed by default.

Step 5

end

Returns to privileged EXEC mode.

 

Example:

 

 

Switch(config)# end

 

Step 6

show interfaces interface-idswitchport

Verifies your entries in the Trunking VLANs Enabled field of the

 

 

display.

 

Example:

 

 

Switch# show interfaces gigabitethernet1/0/1

 

Step 7

copy running-config startup-config

Example:

Switch# copy running-config startup-config

(Optional) Saves your entries in the configuration file.

Note To return to the default allowed VLAN list of all VLANs, use the no switchport trunk allowed vlan interface configuration command.

 

Catalyst 2960-XR Switch VLAN Configuration Guide, Cisco IOS Release 15.0(2)EX1

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Cisco Systems WSC2960XR48FPSI manual Switchport trunk allowed vlan add all except, None remove vlan-list
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WSC2960XR48FPSI specifications

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