[c-nsp] NPE-G1 throughput, with and without L2TP

[Cory Ayers]

> imagine a 7200VXR/NPE-G1 with Gig 0/1 aggregating customers, and Gig
0/2
> connected to an IP transit provider. What throughput can I expect
(typical
> Internet traffic): 500 Mbps? More?

Without L2TP, we have hit 600Mbps across the NPE and concurrently about
50Mbps to an OC-3 off the backplane.  The CPU hovers around 67% at peak.
We are running Netflow, Edge ACLs, about 35 BGP feeds (only 3 are full
Internet), a single OSPF process on the router, and very few other
features.

Cory

> 
> 
> What now it the same traffic is encapsulated into a L2TP tunnel to a
> remote
> similar router? By how much will the throughput drop (due to CPU busy
with
> L2TP)?
> 
> 
> 
> Vincent