[cisco-bba] RE: [c-nsp] MRTG a L2TP VPDN Looback Interface

[Oliver Boehmer (oboehmer)]

I don't think this can easily be done. But why not use half the
interface load as a reasonable approximation in your environment? 

Getting up-to-date/exact statistics without Netflow would likely require
to collect per-user/session stats (IFMIB or VPDN-MIB) and substract it
from the interface counters. 

	oli

Mark Tohill <> wrote on Wednesday, December 21, 2005 4:29 PM:

> Bart Jan,
> 
> Netflow would probably do what we need. The only drawback is majority
> of Netflow Collection/Analysis software out there is either at a cost
> or runs on Unix.
> 
> Correct me if I'm wrong.
> 
> I was hoping that we could have done this with our current setup i.e
> MRTG or RRD, if necessary.
> 
> Thanks,
> Mark.
> 
> -----Original Message-----
> From: BartJan Menkveld [mailto:bartjan at routit.nl]
> Sent: 21 December 2005 13:49
> To: Mark Tohill
> Subject: RE: [c-nsp] MRTG a L2TP VPDN Looback Interface
> 
>  Hello Mark,
> 
> I suggest using netflow accounting on a per protocol basis to
> determine the amount of l2tp traffic.
> 
> With kind regards,
> 
> Bart Jan Menkveld
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Mark Tohill
> Sent: woensdag 21 december 2005 14:30
> To: cisco-bba at puck.nether.net
> Cc: cisco-nsp at puck.nether.net
> Subject: [c-nsp] MRTG a L2TP VPDN Looback Interface
> 
> Hi,
> 
> 
> 
> We have 7204VXR's with L2TP VPDN traffic servicing DSL users  from
> telco coming in on a GigEthernet port.
> 
> The same port also ships out internet-bound traffic for same users.
> 
> 
> 
> Has anyone thoughts on how to determine/poll the VPDN traffic from
> telco separately from raw outbound IP traffic?
> 
> VPDN tunnels terminate on loopbacks which we have tried to monitor,
> with no success. We hoped to subtract this from total in/out traffic
> on gigE port and graph results to new chart.
> 
> 
> 
> Has anyone a means of getting around this?
> 
> 
> 
> Thanks.
> 
> Mark.
> 
> 
> 
> 
> 
> 
> 
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