(RADIATOR) Duplicate request id: ignored

[Angel Bustos]

Hi Hugh, Dave et al,

I'm receiving just accounting forward from a customer for further
processing, and I've noticed the same problem; a lot of retransmissions
(connectivity with our customer is really good however); 

I've followed your advice and i've set explicitly DupInterval to 2 seconds
in our customer's NAS Client clause, and I can see in our logfile lots of
INFO  messages: 

Thu Jun 27 22:30:56 2002: INFO: Duplicate request id 28 received from
x.x.x.x(48766): ignored 

I understand from this the same thing  Dave pointed: Radiator just
ignore and  discard retransmission without further action, but the
retransmissions ocurred wasting BW in our case 

I saw the rfc's in Radiator /doc directory and it seems that radius
protocol cannot sent "rejects" backward to avoid wasting BW by lots of
UDP re-transmissions;
Radiator by itself, could have another feature to avoid this waste of
bandwidth or I'm missing completely the point? 

Best regards, 

Angel Bustos
angelbustos at brujula.net 

 


On Thu, 27 Jun 2002, Hugh Irvine wrote: 

>
> Hello Dave - 
>
> You normally configure the timeout and retransmit values in your NAS(s) so
> there will only ever be a small number of retransmissions. If your NAS >sends more requests than you tell it to, it is an issue that must be >addressed by your supplier. 
>
> BTW - the DupInterval configured in the Client clauses defines the number > of seconds in the sliding window during which a retransmission is > >considered a duplicate. 
>
> I suggest you read the RFC's for further information (included in the
> Radiator distribution in the "doc" directory). 
>
> regards 
>
 

>
> Hugh 
>
>
> On Thu, 27 Jun 2002 07:04, Dave Kitabjian wrote:
> > "Wed Jun 26 16:03:16 2002: INFO: Duplicate request id 87
> > received from 10.52.0.1(1026): ignored"
> >
> > This message was logged for an Accounting request that was clearly
> > retransmitted since it had a large Acct-Delay-Time value.
> >
> > But if Radiator keeps ignoring the request, the NAS will keep
> > retransmitting, and the circle of life will go on and on and on...
> >
> > Does the RFC say to ignore dups? Wouldn't it make more sense to Reject
> > them somehow? Or, if the original one was already processed
> > successfully, it could simply send back an Accept and then discard it as
> > a dup?> >
> > Dave
> >
> > ===
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