a.The Status Information tab
#Tear down the link between Switch A and Switch B.
#Display the status information of port GigabitEthernet 1/0/2 on Switch A.
∙Click Refresh. The updated status information of port GigabitEthernet 1/0/2 shows that no neighbor device is connected to the port, as shown in b.
b.The Status Information tab displaying the updated port status information
Network requirements
As shown in a, port GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 of Switch A are each connected to a Cisco IP phone.
On Switch A, configure VLAN 2 as a voice VLAN and enable CDP compatibility of LLDP to allow the Cisco IP phones to automatically configure the voice VLAN, confining their voice traffic within the voice VLAN to be isolated from other types of traffic.
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