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Re: [RRG] Re: [RAM] Different approaches for different protocols



-----Original Message-----
From: Dino Farinacci [mailto:dino@cisco.com]
Sent: Thursday, December 20, 2007 10:47 PM
To: Brian E Carpenter
Cc: Victor Grishchenko; Tony Li; Routing Research Group list
Subject: Re: [RRG] Re: [RAM] Different approaches for
different protocols

LISP is in some sense a step backwards since it assumes that
sites won't be running multiple prefixes, so the only use
of multiple addresses will be link local v. ULA v. PI.

Sites *can* have multiple EID-prefixes in LISP, and they will occur
when small EID-prefix blocks are allocated because a site under-
estimated the number of systems it has to number.

Then, why not have LISP cut straight to the chase and
go straight to IPv6 in the EID space (leave the RLOC
space as IPv4)? To my understanding, management of

It certainly can. LISP is not taking any detours. I mentioned this at the RRG, on our roadmap for implementation is to test IPv6 EIDs over IPv4 RLOCs.

multiple prefixes is better handled in IPv6, and IMHO
we need to get to IPv6 in the not-too-distant future
anyway...

We are not designing in serial but in parallel.

Dino

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