Avaya Configuring and Troubleshooting Bay Dial VPN (DVS) Networks Instrukcja Użytkownika Strona 94

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Configuring and Troubleshooting Bay Dial VPN Services
6-4 303509-A Rev 00
Using RADIUS Accounting
The NAS logs the tunnel-bound link sessions to the service provider’s RADIUS
server. This information reflects the usage of the NAS ports, but it is different
from the home network information in that it may not reflect link aggregation, and
it is not based on remote user information.
The gateway generates its own accounting information, based on the traffic seen at
the gateway and reports this data to the customer’s RADIUS server.
The RADIUS server that authenticates the tunnel also tracks resource usage
through the accounting messages it receives. The RADIUS client also preserves
the Class attribute and sends it in accounting start and stop messages to identify
allocated sessions. The user session’s authorization information flows from the
customer RADIUS server return message. The local tunnel client does not have
the validated user identification until after the tunnel is formed.
Service Provider Accounting Messages
In general, the NAS logs sessions based on user connections just as it does for
normal session logging, but with the addition of tunnel information. Tunnel setup
exchanges that carry their own authentication information (administrative account
names and passwords) or that are not bound to dial-in ports generate separate
accounting messages. To distinguish these log messages from chargeable user
sessions, these messages carry start and stop designators for Service-Type of
Tunnel and Accounting-Status-Type of Tunnel.
Table 6-1
summarizes the user start messages that the NAS sends to the service
providers RADIUS server.
Table 6-1. Service Provider User Start Accounting Messages
Field Name Contents
Acct-Status-Type Start
NAS-IP-Address, Port,
Port-Type
Connection origination of call
Username The original contents of the user field
Calling-Station-ID
Called-Station-ID
Either or both, if applicable
(continued)
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