Using CE Router for Internet and VPN services

sthaug at sthaug at
Fri Jul 17 13:16:52 UTC 2009

> > Please describe all benefits and detriments of using more than /30
> > subnet on SP PE.
> > Some good links will be very useful for me.
> Don't know all, but have you see the arp tables on a PE router? Have you 
> seen some of the crazy things devices other than routers can do on 
> ethernet?

Good point. We allow VPN users to have up to a /29 directly connected.
Any more than that and we require a CE router. Important for scaling
when you have PEs aggregating 10k or 20k customer interfaces.

Steinar Haug, Nethelp consulting, sthaug at

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