Installation guide

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards

Configuration Examples for EtherSwitch HWICs

Cisco IOS Release 12.3(8)T4

OL-6454-01

interface Vlan 150

description voice vlan

ip address 10.150.1.1 255.255.255.0

ip helper-address 172.20.73.14 (See Note below)

interface Vlan 50

description data vlan

ip address 10.50.1.1 255.255.255.0

This configuration instructs the IP phone to generate a packet with an 802.1Q VLAN ID of 150 with an

802.1p value of 5 (default for voice bearer traffic).

Note In a centralized CallManager deployment model, the DHCP server might be located across the WAN

link. If so, an ip helper-address command pointing to the DHCP server should be included on the voice

VLAN interface for the IP phone. This is done to obtain its IP address as well as the address of the TFTP

server required for its configuration.

Be aware that IOS supports a DHCP server function. If this function is used, the EtherSwitch HWIC

serves as a local DHCP server and a helper address would not be required.

Inter-VLAN Routing Example

Configuring inter-vlan routing is identical to the configuration on an EtherSwitch HWIC with an MSFC.

Configuring an interface for WAN routing is consistent with other IOS platforms.

The following example provides a sample configuration:

interface Vlan 160

description voice vlan

ip address 10.6.1.1 255.255.255.0

interface Vlan 60

description data vlan

ip address 10.60.1.1 255.255.255.0

interface Serial0/3/0

ip address 160.3.1.2 255.255.255.0

Note Standard IGP routing protocols such as RIP, IGRP, EIGRP, and OSPF are supported on the EtherSwitch

HWIC. Multicast routing is also supported for PIM dense mode, sparse mode and sparse-dense mode.

Single Subnet Configuration Example

The EtherSwitch HWIC supports the use of an 802.1p-only option when configuring the voice VLAN.

Using this option allows the IP phone to tag VoIP packets with a CoS of 5 on the native VLAN, while

all PC data traffic is sent untagged.

The following example shows a single subnet configuration for the EtherSwitch HWIC:

Router# FastEthernet 0/1/2

description Port to IP Phone in single subnet

switchport access vlan 40

The EtherSwitch HWIC instructs the IP phone to generate an 802.1Q frame with a null VLAN ID value

but with an 802.1p value (default is COS of 5 for bearer traffic). The voice and data vlans are both 40 in

this example.