Nat Mapping With Session Border Controller; Nat Mapping With Sip-Alg Router; Cisco Discovery Protocol; Lldp-Med - Cisco 8800 Series Manual

Technical Details
The body of the message can contain the XML event Message. For example:
<CiscoIPPhoneExecute>
<ExecuteItem Priority="0" URL="http://xmlserver.com/event.xml"/>
</CiscoIPPhoneExecute>
Authentication:
challenge
":" MD5(A2) )
where A1 = username ":" realm ":" passwd
and A2 = Method ":" digest-uri

NAT Mapping with Session Border Controller

We recommend that you choose an service provider that supports NAT mapping through a Session Border
Controller. With NAT mapping provided by the service provider, you have more choices in selecting a router.

NAT Mapping with SIP-ALG Router

NAT mapping can be achieved by using a router that has a SIP Application Layer Gateway (ALG). By using
a SIP-ALG router, you have more choices in selecting an service provider.

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:
= MD5( MD5(A1) ":" nonce ":" nc-value ":" cnonce ":" qop-value
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
NAT Mapping with Session Border Controller
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