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APPLICATION NOTE - Deploying IP Telephony with EX Series Ethernet Switches

The configuration is performed as follows:

user@switch# set vlans voice-and-data vlan-id 100

user@switch# set interfaces ge-0/0/1 unit 0 family ethernet-switching port-mode

access

user@switch# set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan member

voice-and-data

user@switch# commit

Although this method is technically feasible, it is not a recommended configuration because placing both data and

voice traffic on the same VLAN leaves the voice traffic prone to potential jitter, delay and packet loss—conditions that

are introduced by “bursty” data traffic.

Using Trunk Port with Native-VLAN Option

Using a switch trunk port where the VoIP phone and endpoint host are connected will create the desired separation

between voice and data traffic, but it requires some additional configuration on both the switch and the VoIP phone.

Figure 13: Trunk port with Native-VLAN option

A sample trunk configuration is provided below:

Untagged VoIP VLAN 99

Non-LLDP-MED

Trunk Port with

Native VLAN-

VoIP VLAN

Data

VoIP

EX Series

user@switch# set vlans voip-only vlan-id 99

user@switch# set vlans data-only vlan-id 10

user@switch# set interfaces ge-0/0/1 unit 0 family ethernet-switching port-mode

trunk

user@switch# set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan member

[ voip-only ]

user@switch# set interfaces ge-0/0/1 unit 0 family Ethernet-switching native-

vlan-id data-only

user@switch# commit

Let’s look at this particular configuration in greater detail. Similar to the Voice VLAN feature, two VLANs are configured

here: voip-only and data-only.

user@switch# set interfaces ge-0/0/1 unit 0 family ethernet-switching port-mode

trunk

user@switch# set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan member

[ voip-only ]

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Cisco Ex SERIES Manual do Utilizador Página 13