>>>>> On Mon, 09 Jan 2006 16:59:46 -0500, >>>>> Thomas Narten <[EMAIL PROTECTED]> said:
>> The basic issue left is whether we should allow a node to send an ICMP error >> due to the reception of an NA without the SLLAO. The reason for sending the >> ICMP error is to inform upper layers that the communication has >> failed. > It took me a while to figure out what you are proposing. To summarize: > in the case where where a node receives an NA without an SLLAO, but it > is expecting an SLLAO (so it can complete the Neighbor Cache Entry), > such a received NA is "an error". In the case where a regular data > packet is queued pending completion of the NCE, you'd like to be able > to send back an ICMP error indicating "dest unreachable". Right? > This seems like a fairly minor optimization and one that deals with a > a potential "implementation error" (since I understand this situation > would normally only arise of the sender of the NA incorrectly left off > the SLLAO). If this is the case, IMO, it's not worth modifying the > spec to allow this. I agree. This is actually the same as my impression when I first noticed the change: http://www1.ietf.org/mail-archive/web/ipv6/current/msg06040.html > Indeed, I'd have to think a bit to convince myself > that it couldn't lead to potential cases where an ICMP error would be > (incorrectly) sent when simply ignoring the faulty NA is actually the > more correct response (i.e., if proxies are present and more than one > NA is generated). Good point. I also agree with you on this. > Is this a situation that has come up in actual testing/usage? I guess Hesham meant an old discussion (about a year ago) regarding an optimistic DAD node. But as far as I can see, even an optimistic node does not send the NA in question here. JINMEI, Tatuya Communication Platform Lab. Corporate R&D Center, Toshiba Corp. [EMAIL PROTECTED] -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
