Hi, Mike On 08/19/2013 09:58 PM, C. M. Heard wrote: > > My main question is why this draft is not better integrated with > draft-wkumari-long-headers-01 and draft-bonica-6man-frag-deprecate, > which have overlapping or at least related subject matter.
Because what's in draft-ietf-6man-oversized-header-chain is what the wg agreed upon over time. For instance, some earlier version of draft-ietf-6man-oversized-header-chain enforced an upper limit t the size of the extension header length (1280 bytes, at the time) but such limit was removed from the document in responses to wg consensus. > The thrust of draft-wkumari-long-headers-01 is the claim that > operators have a requirement to filter at Layer 3 and Layer 4, at > line rate, in the network, and that in order to be able to do that, > the entire header chain needs to appear within a relatively short > initial segment of the IPv6 datagram -- the draft suggests 128 > bytes. This is MUCH shorter that the "within the first fragment" > constraint specified by draft-ietf-6man-oversized-header-chain. And it was agred by this wg that this limit would be an operational BCP, but not a protocol update. That's thy these items are kept in different documents. > There is also a strong hint (though not an explicit statement) in > draft-wkumari-long-headers-01 that entities that do in-network > line-rate filtering need to see layer 3 and 4 information in ALL > datagrams, which is at the heart of the subject matter of > draft-bonica-6man-frag-deprecate. The wg discussed this, and I seem to recall that the outcome was that we were not ready to ban the use of fragmentation, but rather that we should move away from it. Cheers, -- Fernando Gont SI6 Networks e-mail: fg...@si6networks.com PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492 -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
