Dear Yoshifumi,
Thanks a lot for the review. Please check inline below for some comments from my side.
On Mon, Oct 14, 2019 at 9:57 AM Yoshifumi Nishida via Datatracker <noreply@xxxxxxxx> wrote:
Reviewer: Yoshifumi Nishida
Review result: Almost Ready
This document has been reviewed as part of the transport area review team's
ongoing effort to review key IETF documents. These comments were written
primarily for the transport area directors, but are copied to the document's
authors and WG to allow them to address any issues raised and also to the IETF
discussion list for information.
When done at the time of IETF Last Call, the authors should consider this
review as part of the last-call comments they receive. Please always CC
tsv-art@xxxxxxxx if you reply to or forward this review.
Summary: This document is almost ready for publication as an informational RFC,
but it will be better to clarify the following points.
1: The examples shown in the draft look behave conveniently.
For examples, in the figure 3 case, the flow is somehow terminated before
the MN moves and is re-initiated after the movement has finished. However, I
believe there should be the cases where applications don't aware of network
changes and transmit data while migrating, which may cause packet drops,
delays and timeouts, etc. I think this draft should clarify the treatments
of these cases. Is it out of scope of the draft? Or, do some components
generate ICMP messages to give some hints to the applications, or provide
buffering features to mitigate the side effects?
[Carlos] I guess you mean Figure 4, right? In that figure, we try to explain what would happen if there is no actual mobility support, meaning that a communication flow does not need such mobility support. This might happen because the flow stops before the movement (as shown in the figure) or also because the application can deal with the mobility itself (no mobility at the IP layer). We don't explicitly mention that second case because it is not in the scope of the draft (IP mobility). We can better clarify the scope in the text.
2: Page 8:
"A MN will need to choose which IP prefix/address to use for each flow
according to whether it needs IP mobility support or not."
-> It seems to me that the draft implicitly suggests the use of
draft-ietf-dmm-ondemand-mobility here.
If so, I think it would be better to state more explicitly. Or, do we
have other options?
[Carlos] We can definitely add an explicit reference to draft-ietf-dmm-ondemand-mobility, but I'd mention it as an example. I don't have another option in mind, but we can leave it open.
3: Page 10:
"the initial anchor remains the anchor and forwards traffic"
-> could be "anchor remains and the anchor.."?
[Carlos] Maybe "mobility anchor remains playing that role and forwards traffic"?
Thanks!
Carlos
Thanks,
--
Yoshi
Special Issue "Beyond 5G Evolution": https://www.mdpi.com/journal/electronics/special_issues/beyond_5g
