Cisco Ex SERIES Manuel d'utilisateur télécharger pdf (Page 14)

APPLICATION NOTE - Deploying IP Telephony with EX Series Ethernet Switches

However, in this case the interface is configured as a trunk that includes only the voice VLAN. In order to separate the

voice and data traffic, the trunk port will transmit and receive only tagged traffic on the trunk VLAN member list, which

in this case is the voip-only VLAN.

Since a typical endpoint host such as a desktop or laptop will send its packets untagged (which will subsequently be

relayed by the VoIP phone), the corresponding switch trunk port must be configured with the “native-vlan-id” option in

order to transmit and receive untagged traffic belonging to the native VLAN, which in this case is the data-only VLAN.

Otherwise, untagged packets sent from the endpoint host and relayed by the phone would be dropped on the switch

trunk port by default, since the packets are untagged.

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

vlan-id data-only

Description and Deployment Scenario—Method 2: Separate Ports for

VoIP Phone and Endpoint Device

Figure 14: Separate ports for VoIP and endpoint device

In contrast to the shared switch-port configuration discussed earlier, VoIP phones (LLDP-MED-capable and non-

capable) and endpoint hosts can also occupy their own ports. This is not a typical IP telephony deployment in the

enterprise today, where cost reduction is a priority, but there are cases where endpoint devices would occupy their own

ports, mainly for management, troubleshooting and maintenance purposes.

Assigning Each Port as Access Port for Dierent VLAN

When attaching VoIP phones and endpoint devices to their own ports, one approach is to assign each port to different

VLANs, so that the port connected to the VoIP phone is configured for voice traffic and the port connected to the

endpoint host is configured for data traffic.

Figure 15: Each port as access port for different VLAN

Data

VoIP

EX Series

Data VLAN 10

Data

VoIP VLAN 99

VoIP

EX Series

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Cisco Ex SERIES Manuel d'utilisateur Page 14