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VoIP Phone not using the Voice VLAN

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When a VoIP phone is attached to an MS switch, it may be seen operating on the regular VLAN and not the port's configured Voice VLAN. When this happens, verify that the phone is running LLDP (with LLDP-MED support for PoE) or CDP to communicate with the switch. If the phone is running a different layer 2 discovery protocol, then the port will need to be configured manually to use the desired voice VLAN as its default VLAN. If using the appropriate protocol, the switch will tell the VoIP device what VLANs to use for voice and data traffic. If the phone is running LLDP or CDP and is not being recognized, the switch may need to be updated. Please refer to our documentation to ensure your switch's firmware is up to date.

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Last modified
14:21, 21 Apr 2016

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ID: 1139

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