Ron, I do have a few questions and suggestion about the practices documented in the draft:
- Section 4.1, second paragraph: why DF bit "MUST" set to 1 when the payload header has "0"? I would think default should be same as the "payload" DF setting. - Section 5.1, last sentence: "The GRE egree router will forward the payload fragments to their ultimate destination where there will be reassembled" The GRE egress router should reassemble the fragmented payloads before sending to the destination. In general, the network outside the Egress router should be same as the network before entering the Ingress router. If the data frame size is less than then MTU of the network before entering the Ingress router, the decapsulated frame size should be less than the MTU of the network outside the Egress router. In addition, it is the Ingress node split the frame, the final destination may not be aware of how to reassemble the data frame. - There should be two options when the encapsulated data frame exceeds MTU: a) split the data frame to two smaller frames, with each frame being encapsulated; b) truncate the frame if the Egress node needs to receive the data frame but doesn't have the capability to reassemble split frames. Linda > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Ronald Bonica > Sent: Wednesday, May 29, 2013 8:37 AM > To: Internet Area > Subject: [Int-area] FW: New Version Notification for draft-bonica- > intarea-gre-mtu-00.txt > > Folks, > > If you get a chance, please provide a sanity check on this document. It > is very short, so it won't take much time to review. > > Ron > > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] > > Sent: Wednesday, May 29, 2013 9:34 AM > > To: Ronald Bonica > > Subject: New Version Notification for draft-bonica-intarea-gre-mtu- > > 00.txt > > > > > > A new version of I-D, draft-bonica-intarea-gre-mtu-00.txt > > has been successfully submitted by Ron Bonica and posted to the IETF > > repository. > > > > Filename: draft-bonica-intarea-gre-mtu > > Revision: 00 > > Title: Generic Routing Encapsulation (GRE) Fragmentation > > Strategy > > Creation date: 2013-05-29 > > Group: Individual Submission > > Number of pages: 8 > > URL: http://www.ietf.org/internet-drafts/draft-bonica- > > intarea-gre-mtu-00.txt > > Status: http://datatracker.ietf.org/doc/draft-bonica- > intarea- > > gre-mtu > > Htmlized: http://tools.ietf.org/html/draft-bonica-intarea-gre- > > mtu-00 > > > > > > Abstract: > > This memo documents a GRE fragmentation strategy upon which many > > vendors have converged. Specifically, it defines procedures to be > > executed by GRE ingress routers. It is published so that those > > building new implementations will be aware of best common practice. > > It is also published so that those building applications over GRE > > will understand how GRE works. > > > > > > > > > > > > The IETF Secretariat > > > > _______________________________________________ > Int-area mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/int-area _______________________________________________ Int-area mailing list [email protected] https://www.ietf.org/mailman/listinfo/int-area
