(RADIATOR) radiator handling NAS-down condition?

[Claudio Lapidus]

Hello Prakash

Many NAS models can be configured to send a special type of accounting
messages, known as Accounting-On and Accounting-Off messages. With proper
configuration, Radiator and its associated session database can handle this
automatically. Essentially, when an Accounting-Off is received, the server
shuts down all sessions belonging to that NAS. However, this only occurs in
case of a programmed shutdown, because in case of a crash the NAS doesn't
have the opportunity to send any message. But when the NAS starts up again,
it sends an Accounting-On, telling the server that any previous session for
that NAS is no longer valid.

Please see RFC2866, section 5.1 for details.

hope this helps
cl.


On 11/28/06, Prakash Jayaraman <prakash at net.com> wrote:
>
> Hi Dave,
>
> The problem is that when the NAS shuts down, a bunch of accounting-start
> messages are left dangling in the session database (because the
> corresponding accounting-stop messages will be absent).
>
> I am trying to get more information from our customer that is using our
> NAS and radiator server. Hopefully I will get to know more configuration
> data very soon.
>
> There was another suggestion from a list member that a script might have
> to be written to automatically trigger accounting-stop messages. I will pass
> on all suggestions to our customer.
>
> thanks,
> - prakash
>
>
> Dave Kitabjian wrote:
>
> It's hard to tell what you're asking for... But if I can add to Hugh's
> reply, Radiator can be configured to "check" the NAS equipment (using
> SNMP, etc) to confirm whether sessions are really still up, and then it
> will update its Session Database (to which Hugh referred) accordingly...
>
> Dave
>
>
>
> -----Original Message-----
> From: owner-radiator at open.com.au [mailto:owner-radiator at open.com.au <owner-radiator at open.com.au>]
>
>
> On
>
>
> Behalf Of Hugh Irvine
> Sent: Monday, November 27, 2006 4:35 PM
> To: Prakash Jayaraman
> Cc: radiator at open.com.au
> Subject: Re: (RADIATOR) radiator handling NAS-down condition?
>
>
> Hello Prakash -
>
> The radius protocol is a stateless protocol and Radiator does not
> keep any state directly in the server regarding active sessions.
>
> Radiator can be configured however with a session database (usually
> SQL) which is maintained automatically using the accounting start,
> accounting stop, accounting alive and accounting on messages that are
> received from the NAS. Radiator does not use any keepalive mechanism
> to ckeck the NAS equipment.
>
> regards
>
> Hugh
>
>
> On 28 Nov 2006, at 05:08, Prakash Jayaraman wrote:
>
>
>
> Hello there,
>
> Can the radiator server automatically terminate all accounting and
> authentication sessions when a NAS goes down?  Does radiator keep
> track of the status of all NAS by using some sort of keepalive
> mechanism (simple ping when there are no access-requests coming in).
>
> thanks,
> prakash
>
>
> --
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>
> NB:
>
> Have you read the reference manual ("doc/ref.html")?
> Have you searched the mailing list archive (www.open.com.au/archives/
> radiator)?
> Have you had a quick look on Google (www.google.com)?
> Have you included a copy of your configuration file (no secrets),
> together with a trace 4 debug showing what is happening?
>
> --
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