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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-02
Chapter 55 Configuring a VoIP Network
Configuring VoIP on a Switch
Default Configuration
The default setting for all ports is trust-device none.
Specifying a Cisco IP Phone as the Trust Device
To specify a Cisco IP Phone as the trust device, perform this task in privileged mode:
This example shows how to trust only Cisco IP phones on port 4/1:
Console> (enable) set port qos 4/1 trust-device ciscoipphone
Port 4/1 set to only trust device of type ciscoIPPhone.
Console> (enable)
This example shows how to disable the device trust on port 4/1:
Console> (enable) set port qos 4/1 trust-device none
Port 4/1 trust device feature disabled.
Console> (enable)
Verifying a Port’s Trust-Device State
To verify a port’s trust-device state, perform this task in normal mode:
When the trusted boundary is active, the run-time trust state of the port changes depending on the
presence of the phone.
Note The moment that the phone leaves the switch port, there is a slight convergence time for the port to
change to the untrusted state (a maximum time of 15 seconds).
This example shows how to verify the trust-device state and trust state on port 4/1:
Console> (enable) show port qos 4/1
<truncated ...>
Port TxPort Type RxPort Type Trust Type Trust Type Def CoS Def CoS
config runtime config runtime
----- ------------ ------------ ------------ ------------- ------- -------
4/1 1p3q1t 1p1q0t trust-cos trust-cos* 0 0
Port Ext-Trust Ext-Cos Trust-Device
----- --------- ------- ------------
4/1 untrusted 0 ciscoIPPhone
Task Command
Specify a Cisco IP Phone as the trust device. set port qos mod/ports...trust-device
[ciscoipphone | none]
Task Command
Verify a port’s trust-device state. show port qos [mod[/port]]
