Installation guide

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards
How to Configure EtherSwitch HWICs
60
Cisco IOS Release 12.3(8)T4
OL-6454-01
Note Refer to the Cisco AVVID QoS Design Guide for more information on how to implement end-to-end QoS
as you deploy Cisco AVVID solutions.
Beginning in global configuration mode, follow these steps to automatically configure Cisco IP phones
to send voice traffic on the voice VLAN ID (VVID) on a per-port basis (see the “Voice Traffic and
VVID” section on page 60).
SUMMARY STEPS
1. enable
2. configure terminal
3. interface interface-id
4. switchport mode trunk
5. switchport voice vlan vlan-id
DETAILED STEPS
Voice Traffic and VVID
The EtherSwitch HWIC can automatically configure voice VLAN. This capability overcomes the
management complexity of overlaying a voice topology onto a data network while maintaining the
quality of voice traffic. With the automatically configured voice VLAN feature, network administrators
can segment phones into separate logical networks, even though the data and voice infrastructure is
physically the same. The voice VLAN feature places the phones into their own VLANs without the need
for end-user intervention. A user can plug the phone into the switch, and the switch provides the phone
with the necessary VLAN information.
Configuring a Single Subnet for Voice and Data
For network designs with incremental IP telephony deployment, network managers can configure the
EtherSwitch HWIC so that the voice and data traffic coexist on the same subnet. This might be necessary
when it is impractical either to allocate an additional IP subnet for IP phones or to divide the existing IP
address space into an additional subnet at the remote branch, it might be necessary to use a single IP
address space for branch offices. (This is one of the simpler ways to deploy IP telephony.)
This configuration approach must address two key considerations:
Command Purpose
Step 1
Router(config)# enable
Enters the privileged EXEC mode. A preset password may be
required to enter this mode.
Step 2
Router(config)# configure terminal
Enters global configuration mode.
Step 3
Router(config)# interface interface-id
Enters the interface configuration mode and the port to be
configured (for example, interface fa0/3/1).
Step 4
Router(config-if)# switchport mode trunk
Configures the port to trunk mode.
Step 5
Router(config-if)# switchport voice vlan
vlan-id
Configures the voice port with a VVID that will be used
exclusively for voice traffic.