[v6ops] comments on draft-gont-v6ops-ipv6-ehs-in-real-world-00

[神明達哉 <[e-mail]>]

I've read the draft and have a few comments on it:

Section 4: for the probing measurement you should have sent packets
without the extension headers in question to identify the point where
the packets are dropped and make it more likely that it's dropped
because of that extension header.  It may be easily inferred from the
context, but I think it's helpful to note that explicitly.  As I read
the rest of the draft I found it would probably just suffice to refer
to Appendix A.1 from this section.

Section 4
   Packets dropped by the destination AS are less of a
   concern, since they can be assumed to be the result of an explicit
   policy of the organization to which the packets are destined (who can
   make its own decision regarding what kind of traffic is
   "acceptable").
I agree with the sense of this sentence, but I think the "since"
clause is a bit too strong.  For cases like ordinary household users
connected to ISPs, the situation shouldn't be so different from the
case where the packet is dropped in a transit AS in practice.

Section 4: the numbers in tables 1 and 2 are confusing to me.  For
example, in the following cell of table 1:

   +--------------+-----------------+
   |   Dataset    |       DO8       |
   +--------------+-----------------+
   |     Web      |      11.88%     |
   |              | (17.60%-20.80%) |
   +--------------+-----------------+

What exactly do these numbers represent?  I guess '11.88%' is the
percentage of the dropped packets against the total number or probe
packets.  The meaning of the "range" values were explained in the
draft, but it's still not clear enough to me...is 17.60% the
percentage of...what, for example?

Editorial nits:

- Section 3.1: s/patch/path/ ?
   Processing a large amounts of traffic in the slow patch may cause the

- Section 3.2: s/same same/same/
   for the RA-Guard case, but same same techniques can be employed for

- Section 4: s/list/list)/
   o  Mail servers (MX -> AAAA of such list

- Section 4: s/A.2/A.2)/ (?)
   to which a specific router belongs (see Appendix A.2, our

- Section 5.2: s/forged an/forged/
   sending a forged an ICMPv6 Packet Too Big [RFC4443] error message to

- A.1: s/dropping/dropped/ (?)
   Let us assume that we find that IPv6 EHs are dropping on their way to

--
JINMEI, Tatuya