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RFC 4941, "Privacy Extensions for Stateless Address Autoconfiguration in IPv6", September 2007

Source of RFC: ipv6 (int)

Errata ID: 4763

Status: Reported
Type: Technical

Reported By: Jiri Bohac
Date Reported: 2016-08-04

Section 5 says:

DESYNC_FACTOR -- A random value within the range 0 -
   MAX_DESYNC_FACTOR.  It is computed once at system start (rather than
   each time it is used) and must never be greater than
   (TEMP_VALID_LIFETIME - REGEN_ADVANCE).

It should say:

DESYNC_FACTOR -- A random value within the range 0 -
   MAX_DESYNC_FACTOR.  It is computed once at system start (rather than
   each time it is used) and must never be greater than
   (TEMP_PREFERRED_LIFETIME - REGEN_ADVANCE).

Notes:

At various places in the RFC, DESYNC_FACTOR is used in a calculation like (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR) or (TEMP_PREFERRED_LIFETIME - REGEN_ADVANCE - DESYNC_FACTOR). It needs to be smaller than (TEMP_PREFERRED_LIFETIME - REGEN_ADVANCE) for the result of these calculations to be larger than zero. It's never used in a calculation together with TEMP_VALID_LIFETIME.

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