On Wed, 29 Aug 2007 15:28:12 -0700 (PDT) David Miller <[EMAIL PROTECTED]> wrote:
> From: Stephen Hemminger <[EMAIL PROTECTED]> > Date: Wed, 29 Aug 2007 15:13:01 -0700 > > > There was some discussion about implementing TCP NCR (RFC4653) > > and Narasimha Reddy said he might have something that could be used. > > Although this looks interesting, I'm unsure it will help these > cell folks. Actually I can't tell for sure until Rick provides > us with some more details of the exact issue at hand. > > NCR seems to deal with when the trigger loss recovery, whereas > the cell phone network folks aparently want to jack up TCP_RTO_MIN > so that hard timeout based retranmits are deferred a lot more > than normal. > > And reading NCR some more, we already have something similar in the > form of Alexey's reordering detection, in fact it handles exactly the > case NCR supposedly deals with. We do not trigger loss recovery > strictly on the 3rd duplicate ACK, and we've known about and dealt > with the reordering issue explicitly for years. > Yeah, it looked like another case of BSD RFC writers reinventing Linux algorithms, but it is worth getting the behaviour standardized and more widely reviewed. -- Stephen Hemminger <[EMAIL PROTECTED]> - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
