(ASCEND) Re: [Oz-ISP] How hard can it be to get data from a Max 4060?

[Leigh Hart <hart@dotat.com>]

Hi Ross,

Ross Wheeler <ross@home.albury.net.au> wrote:
> 
> This is driving me nuts. 

:)

> All I want to do is monitor the traffic over a 128K MPP or
> MP ISDN circuit.

Silly question: why don't you just use the radius detail records
to bill your isdn clients, the same way you bill your modem ones?

Before you jump up and say "Because 32 bit integer rollover on my
interface counters bites rabid donkey's gonads!", I have an answer
for that too - set your "MAX CALL DURATION" or whatever equivalent
parameter you can in maxen to 3 days.

Why 3 days?  Well, 3 days @ 64k is roughly 2Gb.  This leaves room
for any additional compression based throughput and you can stay
well under the 32 bit integer counter rollover figure of 4Gb.

What does radius do with each 64k channel in an MPPP bundle?  It
logs each one individually, which is why you only have to cater 
for 64Kbps in the maximum call duration.

If your maxen can't do "MAX CALL DURATION", then write a script 
that polls the NAS every hour and kills off any session that's
been up longer than 3 days.

The only downside to this simple, yet elegant solution is you add
10 more flagfalls per month to your customer's ISDN bill.  There's
no problem with the time it takes either, ISDN redials lickety-split.

Just make sure your customer has ntp or some other light traffic
generating source turned on in their router/on their network so
that when the call does go down at 11pm on a Friday night, it 
isn't down the entire weekend leaving their mail banked up all
over the globe :-)

Cheers

Leigh
-- 
| "By the time they had diminished | Leigh Hart, hart@dotat.com |
|  from 50 to 8, the other dwarves | CCNA: http://www.cisco.com |
|  began to suspect 'Hungry' ..."  | PO Box 3057 Newton SA 5074 |
|   -- Gary Larson, "The Far Side" | http://www.dotat.com/hart/ |
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