[c-nsp] Tracking usage on L3 VPN with Internet

[Oliver Boehmer (oboehmer)]

will at loopfree.net <> wrote on Tuesday, April 03, 2007 8:53 PM:

> I have a situation where I need to provide a customer with an L3 MPLS
> VPN (2 sites) and Internet access at each location. I need separate
> (SNMP) counters for the Internet access from the VPN so as to be able
> to bill for usage differently for VPN usage than for Internet. I want
> to hand off ethernet to the customer and avoid the need for a CE
> router. 
> 
[..]
> 
> Is there some solution I'm missing that might easily handle this?

Well, two addtl. options would be 
1) mac accounting (not available on all platforms, and you might have
challenges accounting for inbound traffic)
2) Netflow (which would require to perform some correlation, i.e.
translating the IP addresses in the flow to "Internet" vs. "Intra-VPN")

A CE terminating two sub-interfaces would certainly be the easiest and
most straight-forward way..

	oli