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Re: [v6ops] new draft: draft-colitti-v6ops-host-addr-availability

"Hemant Singh (shemant)" <shemant@cisco.com> Tue, 07 July 2015 21:12 UTC

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From: "Hemant Singh (shemant)" <shemant@cisco.com>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>, "Fred Baker (fred)" <fred@cisco.com>, Andrew Yourtchenko <ayourtch@gmail.com>
Thread-Topic: [v6ops] new draft: draft-colitti-v6ops-host-addr-availability
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Date: Tue, 07 Jul 2015 21:12:26 +0000
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Subject: Re: [v6ops] new draft: draft-colitti-v6ops-host-addr-availability
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-----Original Message-----
From: Brian E Carpenter [mailto:brian.e.carpenter@gmail.com] 
Sent: Tuesday, July 07, 2015 4:41 PM
To: Hemant Singh (shemant); Fred Baker (fred); Andrew Yourtchenko
Cc: v6ops@ietf.org; draft-colitti-v6ops-host-addr-availability@tools.ietf.org
Subject: Re: [v6ops] new draft: draft-colitti-v6ops-host-addr-availability

>It does? I don't see anything in 4862 that prevents a host from generating N separate IIDs and performing SLAAC N times for the same prefix. Now we are getting rid of Modified >EUI-64 as the default IID, that becomes an obvious thing to do.

RFC4862 has no guidance for what specific IID to use.  However, RFC4862 does reference RFC4291 in the context of IID and RFC4291 does include the Modified EUI-42 IID format which uses the host's mac-address.   Thanks, Fred, for replying as well.  

I am only discussing RFC4862 with its Modified EUI-64 format for generating a global IPv6 address.  The reason is because section 7 of the colitti document, in the first bullet, speaks of RFC4862.  

Sure, if one deprecates the Modified EUI-64 format and uses, say, privacy extensions, then one prefix can be used by the host to generate multiple IPv6 globals. 

Hemant

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