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Re: [irtf-discuss] Why do we need to go with 128 bits address space ?

Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp> Wed, 21 August 2019 20:20 UTC

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To: Robert Raszuk <robert@raszuk.net>
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From: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
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Date: Thu, 22 Aug 2019 05:13:43 +0900
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Subject: Re: [irtf-discuss] Why do we need to go with 128 bits address space ?
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Robert Raszuk wrote:

> And btw I would not immediately dismiss LISP nor call it garbage till you
> can demonstrate code and deployment which can do better.

Do better what?

For ID->locator mapping, DNS is the way to go and there is no
point involving routing systems.

For multihoming, current BGP unicast routing system is doing it
poorly but no worse than LISP.

For frequently changing locators, mobile IP takes care of them
with home agents, without flooding mobility information all over
the global routing system.

The point of ID/locator separation is to identify transport
connection by ID only, which enables locator rewriting.
Source locator rewriting makes it reliable. Destination
locator rewriting is sometimes useful for forwarding
without MTU reduction by IP over IP. That's all.

						Masataka Ohta

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