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Configuring H.323 Gatekeepers and Proxies
H.323 Gatekeeper Configuration Task List
VC-307
Cisco IOS Voice, Video, and Fax Configuration Guide
Note To explicitly enable or disable a particular endpoint, specify its host address using a 32-bit subnet
mask.
Configuring Intergatekeeper Communication
This section describes two ways to configure intergatekeeper communication:
• Via DNS, page 307
• Manual Configuration, page 308
Via DNS
To configure intergatekeeper communication using DNS, use the following commands in global
configuration mode:
For all gatekeepers in the system, enter a text record of the form into DNS:
ras [gk-id@] host [:port] [priority]
The gk-id argument is an optional gatekeeper ID. If the optional gatekeeper ID is not specified, host is
used as the gatekeeper ID.
The host argument is either an IP address or the actual host name of the gatekeeper in the form
host.some_domain.com.
The port argument, if specified, should be some port number other than RAS port 1719.
The priority argument specifies the order in which the listed gatekeepers should be searched for
endpoints. Gatekeepers with lower priorities are searched before those with higher numbers.
How you enter the text record for a particular domain depends on the DNS implementation. The
following examples are for the Berkeley Internet Name Domain (BIND). These records are typically
entered into the “hosts” database:
zone1.comintxt“ras gk.zone1.com”
zone2.comintxt“ras gk2@gk.zone2.com”
Command Purpose
Step 1
Router(config)# ip name-server dns-server-name
[server-address2...server-address6]
Specifies the DNS server address.
The arguments are as follows:
• dns-server-name— Specifies the IP address of
the name server.
• server-address2...server-address6—(Optional)
IP addresses of additional name servers (a
maximum of six name servers).
Step 2
Router(config)# ip domain-name name
Defines a default domain name that the Cisco IOS
software uses to complete unqualified host names
(names without a dotted-decimal domain name). The
name argument specifies the default domain name
used to complete unqualified host names. Do not
include the initial period that separates an unqualified
name from the domain name.