On 7/7/14, 5:27 PM, Marc Binderberger wrote:
Hello Darrel et al.,
few questions/comments on your updated draft:
1) not sure Figure 2 and 3 do make much sense as for P=1 the LISP header
layout is figure 4. Yes it is a very didactic approach ;-) but at the end the
OAM and version bits are there is any case with P=1 - or not?
Right, we are trying to show a feature per each sub section. Maybe we
should explicitly mark as "0/1" the bits that are not shown in a given
subsection. We'll work on that.
2) the layout does not fit well with draft-farinacci-lisp-crypto-00. Are
there any plans to solve this? Should this at least be mentioned somewhere?
Both this draft and lisp-crypto are proposals to extend the LISP encap
with new features. I don't think they need to refer each other at this
point.
I just note that by adding multiprotocol support, one could add a shim
header that provides encryption services to the LISP payload.
3) probably too trivial but section "3.3. Version Bits" is not mentioning
anything about the receiver behaviour. Sure, if you don't know the version,
drop it. Or at least I assume this is what you have in mind (?).
good point. Will add.
4) section "4.1. LISP-gpe Routers to (legacy) LISP Routers" you say
When the P bit is set, the N, E, and V bits MUST be set to zero. The
receiving (legacy) LISP router will ignore N, E and V bits, when the
P bit is set.
I would think a receiving legacy LISP router has no idea about the P bit,
which is why you explicitly set N/E/V to zero?
Right. Per LISP specification P bit is ignored, and given that NEV are
set to zero, the next protocol field is ignored too. We'll rephrase the
sentence to make it more clear.
5) as you even mention "Ethernet" (or 802.1Q) in the informative reference
section, what about a reference to "Network Service Header" ?
Right. Will add.
Thanks for the review!
Fabio
So just smaller points I make, overall a very interesting document!
Best regards,
Marc
On Fri, 04 Jul 2014 12:45:06 -0700, [email protected] wrote:
A New Internet-Draft is available from the on-line Internet-Drafts
directories.
Title : LISP Generic Protocol Extension
Authors : Darrel Lewis
Puneet Agarwal
Larry Kreeger
Fabio Maino
Paul Quinn
Michael Smith
Navindra Yadav
Filename : draft-lewis-lisp-gpe-02.txt
Pages : 15
Date : 2014-07-04
Abstract:
This draft describes extending the Locator/ID Separation Protocol
(LISP) [RFC6830], via changes to the LISP header, with three new
capabilities: support for multi-protocol encapsulation, operations,
administration and management (OAM) signaling, and explicit
versioning.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-lewis-lisp-gpe/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-lewis-lisp-gpe-02
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-lewis-lisp-gpe-02
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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