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Chapter 6
Cable CPE Commands
h323-gateway voip bind srcaddr
To configure the cable access router so that H.323 VoIP traffic is sent using the Ethernet interface's IP
address, use the h323-gateway voip bind srcaddr command in cable interface configuration mode. To
return to the default configuration, so that the router uses the cable interface's IP address for H.323 VoIP
traffic, use the no form of this command.
Cisco uBR924, uBR925 cable access routers, Cisco CVA122 Cable Voice Adapter
Syntax Description
ip-address
Defaults
No defaults assigned. By default, H.323 traffic is transmitted with the IP address assigned to the cable
interface.
Command Modes
Interface configuration (cable interface only)
Command History
Release
12.1(2)T
12.1(5)XU1
12.2(2)XA
Usage Guidelines
The h323-gateway voip bind srcaddr command can be used with any interface, but it is primarily used
with the cable access router's Ethernet interface when configuring a virtual private network (VPN). In
this configuration, the h323-gateway voip bind srcaddr command configures the router so that VoIP
traffic is sent using the IP address of the Ethernet interface (as opposed to the default behavior, which is
to use the IP address of the default outgoing interface, which is the cable interface).
The h323-gateway voip bind srcaddr command allows the enterprise network to maintain the H.323
gatekeeper and gateway in the enterprise network's address space. Without the h323-gateway voip bind
srcaddr command, outgoing voice traffic uses the IP address of the cable interface. This method requires
that the H.323 gatekeeper and gateway be maintained in the cable service provider's address space,
which is not desirable if the enterprise needs to control the voice network and VPN configuration.
Note
The h323-gateway voip bind srcaddr command can be used only when the cable access router is
operating in routing mode. This command has no effect when the router is operating in DOCSIS bridging
mode.
OL-1581-07
h323-gateway voip bind srcaddr ip-address
no h323-gateway voip bind srcaddr
Specifies the IP address to be used for outgoing H.323 traffic, which
includes H.225, H.245, and RAS messages. This IP address typically is the
IP address assigned to the Ethernet interface.
Modification
This command was introduced for the Cisco uBR924 cable access router.
Support was added for the Cisco CVA122 Cable Voice Adapter.
Support was added for the Cisco uBR925 cable access router.
h323-gateway voip bind srcaddr
Cisco Broadband Cable Command Reference Guide
6-47
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