Basically this is similar to CCM group. If one box goes down the next box in line takes over. There is nothing really much to it.
Benefits: Redundancy and Load Balancing
Drawbacks: Can't think of any but depending on IOS versions there are some restrictions. This is for 12.3.
The gatekeeper-to-gatekeeper redundancy and load-sharing mechanism has the following restrictions and limitations:
The gatekeeper-to-gatekeeper redundancy and load-sharing mechanism requires the Cisco H.323 VoIP Gatekeeper for Cisco Access Platforms feature.
The order in which LRQs are sent to the gatekeepers is based on the order in which the gatekeepers are listed. You cannot specify a priority number for a gatekeeper.
Regardless of the order in which the LRQs are sent, the gateway still uses the first gatekeeper that sends an LCF.
The settings for delay between LRQs and the LRQ window are global and cannot be set on a per-zone or technology-prefix basis.
The number of remote gatekeepers multiplied by the delay per LRQ cannot exceed the Routing Information Protocol (RIP) timeout. Therefore, we recommend that you limit your list of remote gatekeepers to two or three.
If LRQ forwarding is enabled on the directory gatekeeper, the sequential setting for LRQs is ignored.
Only E.164 address resolution is supported.
Using redundant H.323 zone support in the "directory gatekeeper" can generate extra RAS messages. Therefore, the number of "directory gatekeeper" levels should be kept to a minimum (two or three at the maximum).
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
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assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...