Installation guide

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards
How to Configure EtherSwitch HWICs
15
Cisco IOS Release 12.3(8)T4
OL-6454-01
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Router#
Configuring a Description for an Interface
You can add a description of an interface to help you remember its function. The description appears in
the output of the following commands: show configuration, show running-config, and show
interfaces.
Use the description command, in interface configuration mode, to add a description for an interface:
Configuring a Fast Ethernet Interface as a Layer 2 Trunk
Beginning in global configuration mode, follow these steps to configure a Fast Ethernet interface as a
Layer 2 trunk.
SUMMARY STEPS
1. interface fastethernet interface-id
2. shutdown
3. switchport mode trunk
4. switchport trunk native vlan vlan-num
5. switchport trunk allowed vlan {add | except | none | remove} vlan1 [, vlan [, vlan [, ... ]]
6. no shutdown
7. end
DETAILED STEPS
Command Purpose
Router(config-if)#description string
Adds a description for an interface.
Command Purpose
Step 1
Router(config)# interface fastethernet
interface-id
Selects the interface to configure.
Step 2
Router(config-if)# shutdown
(Optional) Shuts down the interface to prevent traffic flow
until configuration is complete.
Step 3
Router(config-if)# switchport mode trunk
Configures the interface as a Layer 2 trunk.
Note Encapsulation is always dot1q.
Step 4
Router(config-if)# switchport trunk native vlan
vlan-num
(Optional) For 802.1Q trunks, specifies the native VLAN.
Step 5
Router(config-if)# switchport trunk allowed vlan
{add | except | none | remove}
vlan1 [, vlan [, vlan [, ... ]]
(Optional) Configures the list of VLANs allowed on the
trunk. All VLANs are allowed by default. You cannot
remove any of the default VLANs from a trunk.