Enable Nat Mapping - Cisco 8800 Series Manual

Cisco IP Phone Installation
• NAT Mapping with SIP-ALG Router: NAT mapping can be achieved by using a router that has a SIP
• NAT Mapping with a Static IP Address: NAT mapping with an external (public) static IP address can
• NAT Mapping with STUN: If the service provider network does not provide a Session Border Controller

Enable NAT Mapping

You must enable NAT mapping to set NAT parameters.
Before you begin
Access the phone administration web page. See
Procedure
Step 1
Select Voice > Ext(n).
Step 2 Set up the fields as described in
Step 3
Click Submit All Changes.
Application Layer Gateway (ALG). By using a SIP-ALG router, you have more choices in selecting an
service provider.
be acheived to ensure interoperability with the service provider. The NAT mechanism used in the router
must be symmetric. For more information, see
Use NAT mapping only if the service provider network does not provide a Session Border Controller
functionality. For more information on how to configure NAT mapping with a static IP, see
NAT Mapping with the Static IP Address , on page
functionality and if the other requirements are met, it is possible to use Session Traversal Utilities for
NAT (STUN) to discover the NAT mapping. For information on how to configure NAT mapping with
STUN, see Configure NAT mapping with STUN, on page
NAT Mapping Parameters, on page
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
Determine Symmetric or Asymmetric NAT, on page
387.
391.
Access the Phone Web Interface, on page
386.
Enable NAT Mapping
392.
Configure
104.
385