Cisco Systems VC-289 manual Command, Purpose, VC-324

Configuring H.323 Gatekeepers and Proxies

H.323 Gatekeeper Configuration Task List

	Command	Purpose
Step 3 Router(config-gk)# zone prefix		Adds a prefix to the gatekeeper zone list. To remove knowledge of a zone
	gatekeeper-name e164-prefix	prefix, use the no form of this command with the gatekeeper name and prefix.
	[gw-priority pri-0-to-10	To remove the priority assignment for a specific gateway, use the no form of
	gw-alias [gw-alias, ...]]
		this command with the gw-priorityoption.
		The keywords and arguments are as follows:
		• gatekeeper-name—Specifies the name of a local or remote gatekeeper,
		which must have been defined by using the zone local or zone remote
		command.
		• e164-prefix—Specifies an E.164 prefix in standard form followed by dots
		(.). Each dot represents a number in the E.164 address. For example,
		212....... is matched by 212 and any seven numbers.
		Note Although a dot representing each digit in an E.164 address is the
		preferred configuration method, you can also enter an asterisk (*) to
		match any number of digits.
		• gw-priority pri-0-to-10gw-alias—(Optional) Use the gw-priority
		option to define how the gatekeeper selects gateways in its local zone for
		calls to numbers that begin with prefix e164-prefix. Do not use this option
		to set priority levels for a prefix assigned to a remote gatekeeper.
		Use values from 0 to 10. A 0 value prevents the gatekeeper from using the
		gateway gw-aliasfor that prefix. Value 10 places the highest priority on
		gateway gw-alias. If you do not specify a priority value for a gateway, the
		value 5 is assigned.
		To assign the same priority value for one prefix to multiple gateways, list
		all the gateway names after the pri-0-to-10value.
		The gw-aliasname is the H.323 identification (ID) of a gateway that is
		registered or that will register with the gatekeeper. This name is set on the
		gateway with the h323-gateway voip h.323-id command.

To put all your gateways in the same zone, use the gw-priorityoption and specify which gateways are used for calling different area codes. For example:

zone local localgk xyz.com
zone prefix localgk 408
zone	prefix	localgk	415	gw-priority	10 gw1 gw2
zone	prefix	localgk	650	gw-priority	0 gw1

The above commands accomplish the following:

•Domain xyz.com is assigned to gatekeeper localgk.

•Prefix 408 is assigned to gatekeeper localgk, and no gateway priorities are defined for it; therefore, all gateways registering to localgk can be used equally for calls to the 408 area code. No special gateway lists are built for the 408 prefix; a selection is made from the master list for the zone.

•The prefix 415 is added to gatekeeper localgk, and priority 10 is assigned to gateways gw1 and gw2.

Cisco IOS Voice, Video, and Fax Configuration Guide

VC-324