Configure Mgcp Inspection - Cisco ASA Series Configuration Manual

Chapter 14 Inspection for Voice and Video Protocols
Figure 14-1
to
MGCP endpoints are physical or virtual sources and destinations for data. Media gateways contain
endpoints on which the call agent can create, modify and delete connections to establish and control
media sessions with other multimedia endpoints. Also, the call agent can instruct the endpoints to detect
certain events and generate signals. The endpoints automatically communicate changes in service state
to the call agent.
•
•
MGCP inspection does not support the use of different IP addresses for MGCP signaling and RTP data.
Note
A common and recommended practice is to send RTP data from a resilient IP address, such as a loopback
or virtual IP address; however, the ASA requires the RTP data to come from the same address as MGCP
signaling.

Configure MGCP Inspection

Use the following process to enable MGCP inspection.
Procedure
Configuring an MGCP Inspection Policy Map for Additional Inspection Control, page
Step 1
Configure the MGCP Inspection Service Policy, page
Step 2
Using NAT with MGCP
To PSTN
Cisco
PGW 2200
209.165.201.11
Gateway is told
to send its media
MGCP
209.165.200.231
(public address
of the IP Phone)
209.165.200.231
Gateways usually listen to UDP port 2427 to receive commands from the call agent.
The port on which the call agent receives commands from the gateway. Call agents usually listen to
UDP port 2727 to receive commands from the gateway.
H.323
209.165.201.1
SCCP
GW
GW
RTP to 209.165.201.1
from 209.165.200.231
14-15.
Cisco ASA Series Firewall CLI Configuration Guide
MGCP Inspection
M
Cisco
M
CallManager
M
209.165.201.10
209.165.200.231
RTP to 10.0.0.76
from 209.165.200.231
IP IP IP
10.0.0.76
Branch offices
14-14.
14-13