Cisco WS-C2960S-48LPD-L Software Guide - Page 269
Changing the Pruning-Eligible List, Configuring the Native VLAN for Untagged Traffic
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Chapter 12 Configuring VLANs Configuring VLAN Trunks To return to the default allowed VLAN list of all VLANs, use the no switchport trunk allowed vlan interface configuration command. This example shows how to remove VLAN 2 from the allowed VLAN list on a port: Switch(config)# interface gigabitethernet0/1 Switch(config-if)# switchport trunk allowed vlan remove 2 Switch(config-if)# end Changing the Pruning-Eligible List The pruning-eligible list applies only to trunk ports. Each trunk port has its own eligibility list. VTP pruning must be enabled for this procedure to take effect. The "Enabling VTP Pruning" section on page 13-14 describes how to enable VTP pruning. Beginning in privileged EXEC mode, follow these steps to remove VLANs from the pruning-eligible list on a trunk port: Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Command Purpose configure terminal Enter global configuration mode. interface interface-id Select the trunk port for which VLANs should be pruned, and enter interface configuration mode. switchport trunk pruning vlan {add | except | none | remove} vlan-list [,vlan[,vlan[,,,]] Configure the list of VLANs allowed to be pruned from the trunk. (See the "VTP Pruning" section on page 13-4). For explanations about using the add, except, none, and remove keywords, see the command reference for this release. Separate nonconsecutive 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. end Return to privileged EXEC mode. show interfaces interface-id switchport Verify your entries in the Pruning VLANs Enabled field of the display. copy running-config startup-config (Optional) Save your entries in the configuration file. To return to the default pruning-eligible list of all VLANs, use the no switchport trunk pruning vlan interface configuration command. 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. Note The native VLAN can be assigned any VLAN ID. OL-8603-04 Catalyst 2960 Switch Software Configuration Guide 12-19
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