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Switch-2: Config
48PoE_config#vlan 10
48PoE_config_vlan10#exit
48PoE_config#int vlan 10
48PoE_config_v20#ip add 10.10.1.2 255.255.255.0
48PoE_config_vlan20#exit
48PoE_config#int gigaEthernet 0/2
48PoE_config_g0/2#switchport mode trunk
48PoE_config_g0/2#switchport trunk allowed vlan all
2) Send ping packet to IP phone with Switch-2, grab packet on Switch-2, and check that the priority of Voice VLAN configuration is 7 on the
package of 802.1Q.
2.1.4 Root Cause
When configuring voice VLAN, you need to create corresponding VLAN (not vlan1).
When IP phone sends voice data without VLAN Tag, you need to configure Voice VLAN based on MAC address matching on the PoE switch.
2.1.5 Solution
1. When configuring voice VLAN, you need to create a new VLAN. Vlan1 cannot be configured as voice VLAN.
2. When the IP phone does not support lldp protocol to obtain voice VLAN information, the voice VLAN based on MAC address can be
configured.
2.1.6 Suggestions and Conclusions
When configuring the voice VLAN function, you need to pay attention to creating a new VLAN; when accessing the IP phone, you can configure
Voice VLAN based on MAC address matching as required.
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