Re: DSTM Considered Harmful [Re: (ngtrans) final ngtransagendaforIETF-53 in Minneapolis]

From: Pekka Savola (pekkas_at_no.spam)
Date: Tue Mar 19 2002 - 17:10:07 PST


On Wed, 20 Mar 2002, Brian E Carpenter wrote:
> The advantage of the BIA scenario is that *no* IPv4 connectivity
> whatever is required to allow IPv6 hosts to talk to legacy IPv4
> applications in other IPv6 hosts. As far as I can see that achieves
> everything that DSTM achieves without most of the machinery.
>
> I'd be interested to see a scenario where this isn't the case.

Some of this is probably obvious, but anyway..

BIA: "IPv4 application on IPv6 node can talk to an IPv6 application on
another IPv6 node"

DSTM: "IPv4 application on IPv4/v6 node can talk to an IPv4 application on
IPv4(/v6) nodes" (in addition to full IPv6 connectivity).

So, if the destination site does not have all the services IPv6-enabled,
BIA won't help (at least completely) and DSTM is rather useful if one
wants to avoid protocol translation.

-- 
Pekka Savola                 "Tell me of difficulties surmounted,
Netcore Oy                   not those you stumble over and fall"
Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords


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