John,
[EMAIL PROTECTED] wrote:
Hi Fred,
I wonder if the setting of the "L" bit in Prefix Information options
also bears some mention in this section. RFC 2461, section 4.6.2 says:
"When (the L bit is) not set, the advertisment makes no statement
about on-link or off-link properties of the prefix. For instance,
the prefix might be used for address configuration with some of
the addresses belonging to the prefix being on-link and others
being off-link."
Does this mean that prefix information options with the L bit not
set can be used to auto-configure off-link global or site-local
addresses?
Do you have some suggestion of text to add?
Unfortunately no, because RFCs 2461 and 2462 are both ambiguous on
the subject. RFC 2461, section 6.3.4 ("Processing Received Router
Advertisements") says:
Prefixes with the on-link flag set to zero would normally have the
autonomous flag set and be used by [ADDRCONF].
But, [ADDRCONF] (i.e., RFC 2462) says nothing about how to handle
prefix options with the on-link flag ("L") set to zero!
I believe the Node Requirements document is the right place to resolve
the ambiguity; I'm just not sure what that resolution should be.
Fred
[EMAIL PROTECTED]
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