Per-call statistics support using RADIUS Client 81
A RADIUS client on the IP trunk card allows per-call statistics of the IP
network call to be sent from the cards to a network listener. The client is
based on RFC2139, which defines the accounting portion of the RADIUS
protocol. The IP trunk card uses the authentication algor ithm based on
RFC1321.
Configuration
Use TM 3.1 to configure the following RADIUS parameters:
enable/disable RADIUS record generation
IP address of the RADIUS listener
IP port number of the RADIUS listener
key forauthenticating RADIUS records (the key is maintained between
the RADIUS client and the RADIUS server)
Data is configured at the IP Trunk 3.01 (and later) node leveland is
distributed to all the IP trunk cards associated with the IP Trunk 3.01 (and
later) node.
Messaging
The RADIUS client sends two records to the network listener: one when
the call is answered and one at the end of the call. The messages are
sent by the Followercard which processes the voice call (not the DCHIP or
Leader if they are not handling the voice data). The RADIUS protocol uses
UDP for message exchange. The client sends a message to the listener
and waits for an acknowledgment. If no acknowledgment is received,
the client re-transmits the record using the standard exponential backoff
theme. The data is stored on the IP trunk card until an acknowledgment is
received. When an acknowledgment is received, the data is discarded. The
client stores a maximum of 100 records. This allows two Start and two
End records for each of the 24 or 32 ports (depending on whether it is an
ITG-Pentium 24-port trunk card or a Media Card 32-port trunk card).
Start record
The Start record is sent when the call is answered. It contains the following
fields:
Calling party number
Originating IP address and port
Called party number
Destination IP address and port (of the actual card handling the call, not
the remote Leader)
Call start time
Call duration (time from call initiation to call answer)
Nortel Communication Server 1000
IP TrunkFundamentals
NN43001-563 02.01 Standard
Release 5.5 21December 2007
Copyright© 2007, Nor tel Networks
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