Configuring The Native Vlan For Untagged Traffic - Cisco Catalyst 2960 series Configuration Manual

Command or Action
Step 3
interface interface-id
Example:
Switch(config)# interface
gigabitethernet2/0/1
Step 4 switchport trunk pruning vlan {add | except
| none | remove} vlan-list [,vlan [,vlan [,,,]]
Step 5
end
Example:
Switch(config)# end
Step 6 show interfaces interface-id switchport
Example:
Switch# show interfaces
gigabitethernet2/0/1 switchport
Step 7 copy running-config startup-config
Example:
Switch# copy running-config
startup-config

Configuring the Native VLAN for Untagged Traffic

A trunk port configured with IEEE 802.1Q tagging can receive both tagged and untagged traffic. By default,
the switch forwards untagged traffic in the native VLAN configured for the port. The native VLAN is VLAN
1 by default.
The native VLAN can be assigned any VLAN ID.
Purpose
Selects the trunk port for which VLANs should be pruned, and enters
interface configuration mode.
Configures the list of VLANs allowed to be pruned from the trunk.
For explanations about using the add, except, none, and remove
keywords, see the command reference for this release.
Separate non-consecutive VLAN IDs with a comma and no spaces;
use a hyphen to designate a range of IDs. Valid IDs are 2 to 1001.
Extended-range VLANs (VLAN IDs 1006 to 4094) cannot be
pruned.
VLANs that are pruning-ineligible receive flooded traffic.
The default list of VLANs allowed to be pruned contains VLANs
2 to 1001.
Returns to privileged EXEC mode.
Verifies your entries in the Pruning VLANs Enabled field of the
display.
(Optional) Saves your entries in the configuration file.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
How to Configure VLAN Trunks
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