[c-nsp] MPLS/VPN + Internet Setup - Update

[Tim Franklin]

> My initial plans were to assign PE-CE link IP addresses from the 
> customer address range. The draft mentions similar cons I'd 
> considered. But even though we do not route RFC 1918 addresses 
> within our (global IP) core, I foresee co-ordination issues 
> between the customers and ourselves, which could get worse as 
> the product grows.
> 
> The use of public IP addresses seems to be *the hard choice* 
> between evils :). Too bad the draft didn't make it.

Unfortunately it hurts whichever way you do it :(

Use public addresses, and you do the "wrong thing" for the good of the
Internet community at large in terms of address conservation, and have the
joys of justifying yourself to your provider-of-address-space.  (RIPE in
your case, I guess.)

Use private addresses, and you can easily guarantee they're unique within
your organisation, but you *will* get clashes with customers, and they will
not be happy.  It's possible to build both engineering and process around
it, but it's a not a whole lot of fun.

Regards,
Tim.

-- 
____________   Tim Franklin                 e: tim at colt.net 
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