If the prefix is longer than 64, don't use EUI-64 interface ID.
(7.2)If the prefix length is greater than 64 and is not greater than
80, an address is formed by combining the advertised prefix with
the MAC address of the interface as follows:
| N bits | (80 - N) bits | 48 bits |
+------------------------------+---------------+-----------------+
| link prefix | reserved | MAC address |
+----------------------------------------------------------------+
(7.3) If the prefix length is greater than 80, a random number
between 0 and 2 ^ (128 - prefix length) is generated, and an address
is formed by combining the advertised prefix with the random number
as follows:
| N bits | 128 - N bits |
+---------------------------------------+------------------------+
| link prefix | random number |
+----------------------------------------------------------------+
From: Duncan, Richard J. (Jeremy) CONTRACTOR
Sent: Thursday, March 03, 2011 10:56 PM
To: Yu Hua bing ; [email protected] ; Brian E Carpenter
Cc: Thomas Narten ; ipv6 ; Scott W Brim
Subject: RE: [BULK] Re: draft-yhb-6man-slaac-improvement-00
I think that SLAAC should be deployed in the sites which use the prefixes
longer than 64.
Don't put a limit on the prefix length.
DHCPv6 can be deployed in the sites which use the prefixes longer than 64.Why
can't SLAAC?
It is not reasonable.
No. EUI-64 requires 64 bit host id's. 48 bits is from the MAC. How would you
plan to squeeze blood out of the proverbial turnip?
010100110110010101101101011100000110010101110010001000000100011001101001
Jeremy Duncan
Defense Threat Reduction Agency (DTRA)
BE-BI INFOCON 3, IPv6 Architect
Command Information
Google Voice: (540) 440-1193
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