>>>>> On Thu, 31 Aug 2006 14:16:47 -0700,
>>>>> "James Kempf" <[EMAIL PROTECTED]> said:
> No, but I think it would be worthwhile to find out what real implemenations
> do.
As replied in a separate message (not from me), BSDs separate the
processing of an RA prefix wrt address configuration from the
processing of the prefix wrt on-link determination.
Specifically,
A. if a BSD host receives an containing prefix P/x with the L flag
on, it installs a direct route P/x to the receiving interface,
indicating Neighbor Discovery (NS/NA) is necessary for destinations
covered by the prefix.
B. if a BSD host receives an containing prefix P/x with the A flag on,
it configures the interface with the address P:I (I is some
interface identifier)
A and B are done separately and independently, and processing B does
not involve any direct route creation.
So, if a BSD host receives a prefix P/x with the L flag off and A flag
on, it configures the receiving interface with the address P:I/128.
Since there is no direct route for the prefix P/x, any packet to
destinations covered by the prefix (except P:I) will be sent to the
default router (if any).
> Unless an IETF standard has specific RFC 2119 languge in it, your milage
> can vary.
That is true in general, and it's not specific to RFC2461 (or
2461bis). The semantics of the L bit might be clearer, but I
personally believe the L bit processing is widely interpreted as
described above.
JINMEI, Tatuya
Communication Platform Lab.
Corporate R&D Center, Toshiba Corp.
[EMAIL PROTECTED]
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