Re: [DNA] RE: Review of draft-krishnan-dna-simple-01.txt

[JinHyeock Choi <jinchoe@gmail.com>]

Dear Suresh & Greg

I managed to go over the draft and thanks for your trouble.

Before making comments, I'd like to ensure that I understand the draft right.
Here are a few clarifying questions.

1. Assumption
The draft seems to assume the following w.r.t prefix advertisement.

   1) All routers on the link advertise the same prefixes.
   2) It's out of scope how routers would synchronize their advertisement.

Do I understand right?

2. Link identification.
The draft seems to check for link change as below.

   1) Upon receiving link-layer indication,
           a host would send an RS and an NS simultaneously.
   2) If the host receives a solicited NA from a known node
       of a previously attached link,
           the host assumes it still remains in the same link.
   3) If the host receives a solicited RA with a known prefix
       of a previously attached link,
           the host assumes it still remains in the same link.
       Otherwise, i.e. the host receives no known prefix in the RA,
           the host assumes it moved to a different link.
   4) When 2 & 3 give conflicting answers, 3's decision is definite.

Do I understand right?

3. Fast Router Advertisement
The draft seems to speed up RA delivery as below.

   1) Upon receiving an RS with a tentative option,
       a DNA router immediately sends back an unicast RA without random delay
      (with token bucket based rate control)
   2) It's out of the scope how mulitple DNA routers would avoid collision.

Do I understand right?

Thanks in advance for your kind consideration.

Best Regards

JinHyeock