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Re: [Softwires] I-D Action: draft-ietf-softwire-lw4over6-06.txt

Ole Troan <otroan@employees.org> Wed, 05 March 2014 14:56 UTC

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From: Ole Troan <otroan@employees.org>
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Date: Wed, 05 Mar 2014 14:56:23 +0000
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References: <20140211075445.17615.61208.idtracker@ietfa.amsl.com> <FD878467-904B-4441-95B4-11D4461A612E@employees.org> <CF237FDE.AACEB%ian.farrer@telekom.de> <CAFFjW4jOBfvnqCV4UH8qt0HA5zZ-35f+q5ZepzjnwGX5_Oj9Gg@mail.gmail.com> <8A1B81989BCFAE44A22B2B86BF2B76318A2CDB8ED2@HE111643.EMEA1.CDS.T-INTERNAL.COM> <CAFFjW4iP2KqNJFtJPr5rp0tzRwM5TPjaqiSP5r13JqbX46ao7w@mail.gmail.com> <CD1D4FF6-9509-43B4-AFC4-4F1AF99D0C4D@gmx.com> <CAFFjW4ibkj_xpTuXrbYjxkdxD=+qNzapCGPHJwXsZ-k0ZvGg-g@mail.gmail.com> <CF335888.AE89D%ian.farrer@telekom.de> <CAFFjW4hv5WBiqyw9jM+ZoLMGR5k49pjKXG0epnhrsOGoBBKMYA@mail.gmail.com> <78CE37BA-11FB-4AE4-9D49-A3053616A31A@gmx.com> <53173611.5070208@viagenie.ca> <4255E91E-B1F0-4FE0-9A86-171922C7BC43@gmx.com>
To: Ian Farrer <ianfarrer@gmx.com>
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Cc: Softwires-wg <softwires@ietf.org>
Subject: Re: [Softwires] I-D Action: draft-ietf-softwire-lw4over6-06.txt
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Ian,

> No. As long as you know what particular mechanism you B4 vendor has implemented, you can provision accordingly.
> 
> The lwAFTR never has to do the LPM. It’s just got a tunnel endpoint address configured by the operator.

I'm not comfortable with that.

is there any reason why you couldn't do it as MAP does?

- include a "Domain IPv6 prefix" in the set of provisioning parameters.
- the client does a longest match between the Domain IPv6 prefix and the End-user IPv6 prefixes
  and uses that to create the tunnel end point address.

that also allows the operator to use either the WAN side /64 or an address out of the PD as the tunnel endpoint address.

cheers,
Ole

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