Cisco Catalyst 2960 Series, Configuration Manual

Page: 2217 / 2288

Purpose Command or Action
Specifies the port to be configured for trunking, and enters
interface configuration mode. interface interface-id
Example:
Switch(config)#
interface
Step 3
gigabitethernet1/0/2
Configures the interface as a Layer 2 trunk (required only if the
interface is a Layer 2 access port or tunnel port or to specify the
trunking mode).
switchport mode
{
dynamic
{
auto
|
desirable
} |
trunk
}
Example:
Switch(config-if)# switchport mode dynamic
Step 4
•
dynamic auto
— Sets the interface to a trunk link if the
neighboring interface is set to trunk or desirable mode. This
is the default.
desirable
•
dynamic desirable
—
Sets the interface to a trunk link if the
neighboring interface is set to trunk, desirable, or auto mode.
• trunk — Sets the interface in permanent trunking mode and
negotiate to convert the link to a trunk link even if the
neighboring interface is not a trunk interface.
(Optional) Specifies the default VLAN, which is used if the
interface stops trunking.
switchport access vlan vlan-id
Example:
Switch(config-if)# switchport access vlan
Step 5
200
Specifies the native VLAN for IEEE 802.1Q trunks. switchport trunk native vlan vlan-id
Example:
Switch(config-if)# switchport trunk native
Step 6
vlan 200
Returns to privileged EXEC mode. end
Example:
Switch(config)# end
Step 7
Displays the switch port configuration of the interface in the
Administrative Mode and the Administrative Trunking
Encapsulation fields of the display.
show interfaces interface-id switchport
Example:
Switch# show interfaces gigabitethernet1/0/2
Step 8
switchport
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
2135
How to Configure VLAN Trunks