Administrator Guide

Port Characteristics 617
discarded. When you configure an interface as an access mode port, the
interface is automatically made a member of VLAN 1 and removed from all
other VLAN memberships. Each interface can be configured separately, or a
range of interfaces can be configured with the same settings.
Configuring a Port in Trunk Mode
Beginning in Privileged EXEC mode, use the following commands to
configure an interface as a layer-2 trunking interface, which connects two
switches. Trunk mode ports support traffic tagged with different VLAN IDs.
Untagged received traffic is switched in the native VLAN. A trunk port is
Command Purpose
configure Enter global configuration mode.
interface
interface Enter interface configuration mode for the specified
interface. The interface variable includes the interface type
and number, for example tengigabitethernet 1/0/3.
A range of interfaces can be specified using the interface
range command. For example, interface range
tengigabitethernet 1/0/8-12 configures interfaces 8, 9, 10,
11, and 12.
switchport mode access Configure the interface as an access mode VLAN interface.
Access mode VLANs accept tagged or untagged packets for
the access VLAN only.
switchport access vlan
vlan-id
Configure the interface as a member of the specified
VLAN. By default, access mode ports are members of
VLAN 1.
vlan-id — A valid VLAN ID of the VLAN to which the port
is configured. (Range: 1–4093)
CTRL + Z Exit to Privileged EXEC mode.
show interfaces
switchport interface
Display information about the VLAN settings configured
for the specified interface.