VLAN Settings
The software tags your phone voice packets with the VLAN ID when you use a virtual LAN (VLAN).
In the VLAN Settings section of the Voice > System window, you can configure the different settings:
• LLDP-MED
• Cisco Discovery Protocol (CDP)
• Network Startup Delay
• VLAN ID (manual)
• DHCP VLAN Option
The multiplatform phones support these four methods to obtain VLAN ID information. The phone attempts
to obtain the VLAN ID information in this order:
1. LLDP-MED
2. Cisco Discovery Protocol (CDP)
3. VLAN ID (manual)
4. DHCP VLAN Option
Cisco Discovery Protocol
Cisco Discovery Protocol (CDP) is negotiation-based and determines which virtual LAN (VLAN) the Cisco
IP Phone resides in. If you are using a Cisco switch, Cisco Discovery Protocol (CDP) is available and is
enabled by default. CDP has these attributes:
• Obtains the protocol addresses of neighboring devices and discovers the platform of those devices.
• Shows information about the interfaces your router uses.
• Is media and protocol-independent.
If you are using a VLAN without CDP, you must enter a VLAN ID for the Cisco IP Phone.
LLDP-MED
The Cisco IP Phone supports Link Layer Discovery Protocol for Media Endpoint Devices (LLDP-MED) for
deployment with Cisco or other Third-Party network connectivity devices that use a Layer 2 auto discovery
mechanism. Implementation of LLDP-MED is done in accordance with IEEE 802.1AB (LLDP) Specification
of May 2005, and ANSI TIA-1057 of April 2006.
The Cisco IP Phone operates as a LLDP-MED Media End Point Class III device with direct LLDP-MED
links to Network Connectivity Devices, according to the Media Endpoint Discovery Reference Model and
Definition (ANSI TIA-1057 Section 6).
The Cisco IP Phone supports only the following limited set of Type-Length-Values (TLV) as an LLDP-MED
Media Endpoint device class III:
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
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Cisco IP Phone Installation
VLAN Settings
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