Cisco Catalyst 2960 Series User Manual

PurposeCommand 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

Cisco Catalyst 2960 Series Specifications

General

Layer	Layer 2
Power over Ethernet (PoE)	Available on some models
RAM	128 MB
Flash Memory	32 MB
MAC Address Table Size	8000
Operating Temperature	0°C to 45°C (32 to 113°F)
Ports	24 or 48 x 10/100/1000