Configuring Your System for ITSP Interoperability
Configuring NAT Mapping
Cisco Small Business WRP400 Administration Guide
22
2
•
If the WRP400 is connected to an Ethernet switch, the switch must be
configured to enable Spanning Tree Protocol and Port Fast on the port to which
the WRP400 is connected.
NOTE
Use NAT mapping only if the ITSP network does not provide a Session Border
Controller functionality.
STEP 1
Start Internet Explorer, connect to the Configuration Utility, and choose
Voice >
Admin Login
. If prompted, enter the administrative login provided by the Service
Provider. (The default username and password are both
admin
.)
STEP 2
Under the
Voice
menu, click
SIP
.
STEP 3
In the
NAT Support Parameters
section, enter the following settings:
•
Handle VIA received, Insert VIA received, Substitute VIA Addr:
Choose
yes
.
•
Handle VIA rport, Insert VIA rport, Send Resp To Src Port:
Choose
yes
.
•
EXT IP:
Enter the public IP address that was assigned by your ISP.
Voice tab > SIP: NAT Support Parameters
STEP 4
Under the
Voice
menu, click
Line 1
or
Line 2
to choose the line interface that you
want to modify.
STEP 5
In the
NAT Settings
section, enter the following settings:
•
NAT Mapping Enable:
Choose
yes
.
•
NAT Keep Alive Enable:
Choose
yes
.
Voice tab > Line N > NAT Settings