-----Original Message----- From: Int-area [mailto:[email protected]] On Behalf Of Stewart Bryant Sent: Wednesday, April 29, 2015 2:32 AM To: [email protected] Subject: Re: [Int-area] Why combine IP-in-UDP with GUE?
I confess that I have only skimmed this thread, but as far as I can see no one has mentioned OAM. If we are designing a general purpose encapsulation there really needs to be an OAM indicator so that OAM can fate share with the data that it is monitoring. [Lucy] GUE header has OAM indicator. I don't think it is a factor in this discussion unless people think that we will be doing super DPI, but RFC4928 notes an issue when using the first nibble of a packet as a type identifier in an IP/MPLS environment. In a nutshell this says avoid 0 and 1 as well as 4 and 6. [Lucy] Thank you to point out this. This is why GUE header SHOULD NOT adopt this first nibble approach. However, if GUE payload is IP, it is OK to inspect the first nibble of the payload to determine IPv4 or IPv6 because this aligns with IP protocol. Thanks, Lucy - Stewart _______________________________________________ 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
