L2TPv3 encaps performance

[Joe Abley <jabley () isc org>]

Someone asked me the other day if I could recommend some L2TPv3 tunnel 
termination devices which might be capable of encaps/de-encaps of 
traffic which bursts near to 1Gbit/s (e.g. with GE uplinks to a 
core/transport network, and GE interfaces for hand-off towards the 
subscriber). Application is providing transparent/pseudowire wide-area 
ethernet transport service over a routed-IP but non-LDP-capable core.

This didn't sound like a particularly hard question, but I couldn't 
find any performance numbers on L2TPv3 edge boxes anywhere. What boxes 
exist that can do this stuff at gig speeds?

Replies off-list would be fine, I can summarise if there's interest.