Hi Tom, Got it, thanks. Yes, as I know, UDP-Lite is not widely supported by the parser of switch or NIC chip.
Regards Lizhong From: Tom Herbert Date: 2014-11-28 01:29 To: [email protected] CC: nvo3 Subject: Re: [nvo3] Fwd: New Version Notification for draft-herbert-guecsum-00.txt On Thu, Nov 27, 2014 at 7:40 AM, [email protected] <[email protected]> wrote: > Hi Tom, > > One question that may have been discussed before. What if we directly use > UDP-Lite to encapsulate GUE? Then the checksum in UDP-lite could provide > similar function as the checksum option you defined. > Yes, that would work, but I believe that the general consensus is that UDP-lite is not widely supported is hardware (switches or NICs) and might not even be routed in many networks. On the other hand, UDP has ubiquitous support already so we want to have a solution for UDP encapsulation. Tom > > Regards > > Lizhong > > ---------- Forwarded message ---------- > > This draft is based on feedback from Honolulu. This adds a checksum > option in GUE that should hopefully be adequate to protect against > address corruption when using zero checksums with UDP over IPv6. Also, > made it UDP-lite like so that some portion of payload can optionally > be checksummed. > Comments are appreciated. > Thanks, > Tom > ---------- Forwarded message ---------- > From: <internet-drafts at ietf.org> > Date: Wed, Nov 26, 2014 at 2:42 PM > Subject: New Version Notification for draft-herbert-guecsum-00.txt > To: Tom Herbert <therbert at google.com> > A new version of I-D, draft-herbert-guecsum-00.txt > has been successfully submitted by Tom Herbert and posted to the > IETF repository. > Name: draft-herbert-guecsum > Revision: 00 > Title: Checksum option for Generic UDP Encapsulation > Document date: 2014-11-26 > Group: Individual Submission > Pages: 8 > URL: > http://www.ietf.org/internet-drafts/draft-herbert-guecsum-00.txt > Status: https://datatracker.ietf.org/doc/draft-herbert-guecsum/ > Htmlized: http://tools.ietf.org/html/draft-herbert-guecsum-00 > Abstract: > This specification defines the Generic UDP Encapsulation (GUE) > checksum and an associated header option. This checksum covers the > GUE header, IP addresses, UDP ports, and optionally all or part of > the encapsulated payload. It provides verification of protocol header > elements, and is particularly relevant in the case where the UDP > checksum is set to zero. > 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. > The IETF Secretariat
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