Using Accounting within Your Network
Accounting information about traffic flows is always useful.Where the traffic is
flowing, when the traffic is flowing, and how much traffic is flowing are all useful
information a gatekeeper can log with a TACACS+ or RADIUS server.This data
can aid in capacity planning as well as in optimizing the network.
To enable Administration, Authorization, and Authentication (AAA)
accounting and define a RADIUS server, use the following commands:
aaa new-model
radius-server host 192.168.51.51
radius-server key 0 (password)
To configure the gatekeeper to perform accounting, use the following
commands:
www.syngress.com
144 Chapter 5 • Voice and Video Gatekeeper Design
aaa accounting connection h323 start-stop group radius
gatekeeper
aaa accounting
The start-stop keyword issues an AAA record to the RADIUS server when a
call starts and when it stops.The wait-start keyword can be used in place of this.
With this configuration, the call does not start until the server has received the
start record.This can introduce delays in the call being placed, but it guarantees
that all accounting records are in place before any call is started.This should only
be used when accurate accounting records are of the utmost importance.