Cisco H.323 VC-289 - Manual (Page 20)

Configuring H.323 Gatekeepers and Proxies
H.323 Gatekeeper Configuration Task List
VC-308
Cisco IOS Voice, Video, and Fax Configuration Guide
zone3.comintxt“ras [email protected]:1725”
zone4.comintxt“ras [email protected]:1725 123”
zone5.comintxt“ras [email protected]:1725”
Manual Configuration
If you choose not to use DNS or if DNS is not available, configure intergatekeeper communication
manually. To configure intergatekeeper manual communication, use the following command in
gatekeeper configuration mode for every other gatekeeper in the network:
Configuring Redundant H.323 Zone Support
Regardless of whether you specify sequential or blast, there is an order to how the LRQs are sent. With
sequential, the LRQs are sent one at a time with a delay between each. With blast, the LRQs are sent
back-to-back in a rapid sequence without any delay between them. The order in which zone and
technology prefixes are configured determines the order in which the LRQs are sent to the remote
gatekeepers. Using zone prefixes as an example, the local gatekeeper routes the call to the first zone that
responds with an LCF. If the local gatekeeper is configured for a zone prefix that already has remote
gatekeepers configured, the local gatekeeper will automatically put that zone prefix at the top of the list.
For example:
gatekeeper
zone local gnet-2503-2-gk cisco.com
zone remote gnet-2600-1-gk cisco.com 172.18.194.131 1719
zone remote gnet-2503-3-gk cisco.com 172.18.194.134 1719
zone prefix gnet-2600-1-gk 919.......
zone prefix gnet-2503-6-gk 919.......
With this configuration, LRQs are first sent to gnet-2600-1-gk (which is the first zone prefix because it
has a remote gatekeeper configured for it) and then to gnet-2503-6-gk (which is the second zone prefix).
If you add the local gatekeeper to that zone prefix, it automatically goes to the top of the list, as shown
below:
gatekeeper
zone local gnet-2503-2-gk cisco.com
zone remote gnet-2600-1-gk cisco.com 172.18.194.131 1719
Command Purpose
Router(config-gk)# zone remote other-gatekeeper-name
other-domain-name other-gatekeeper-ip-address
[port-number]
Statically specifies a remote zone if Domain Name System
(DNS) is unavailable or undesirable. Enter this command
for each gatekeeper.
The arguments are as follows:
• other-gatekeeper-name—Specifies the name of the
remote gatekeeper.
• other-domain-name—Specifies the domain name of
the remote gatekeeper.
• other-gatekeeper-ip-address—Specifies the IP
address of the remote gatekeeper.
• port-number—(Optional) Specifies the RAS signaling
port number for the remote zone. Value ranges are
from 1 to 65,535. If this option is not set, the default is
the well-known RAS port number 1719.