[c-nsp] MPLS VPN Question about PE-CE - Private or Public IP?

[Mikael Abrahamsson]

On Wed, 20 Aug 2008, Andy Saykao wrote:

> Just wondering from those in the know, whether it's best practice to
> implement public or private IP's for the PE-to-CE link. What's everyone
> using and why?

Best practice is to use public IP for the PE-CE link and then you admin 
the CE using that address. If you have a serial interface you can do this 
with a /32 routed towards the physical interface and use 
unnumbered/loopback, otherwise you have to use /30 or /31.

Using RFC1918 space creates huge potential of overlaps with customers, and 
a nightmare for management if you want your CE range to be unique per VPN, 
how are you going to reach your CEs via SNMP etc?

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se