Re: Summary of responses so far and proposal moving forward[WasRe: [tcpm] Is this a problem?]
David Borman <david.borman@windriver.com> Wed, 28 November 2007 00:16 UTC
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From: David Borman <david.borman@windriver.com>
To: Mahesh Jethanandani <mahesh@cisco.com>
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Subject: Re: Summary of responses so far and proposal moving forward[WasRe: [tcpm] Is this a problem?]
Date: Tue, 27 Nov 2007 18:16:29 -0600
References: <20071126193803.585E12FC5BE@lawyers.icir.org> <61806008-0CBC-417D-B5EB-46A7EE18446F@windriver.com> <474CA683.2030600@cisco.com>
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On Nov 27, 2007, at 5:21 PM, Mahesh Jethanandani wrote: > My understanding of rfc 1122 is and I quote from the rfc itself: > >> A TCP MAY keep its offered receive window closed >> indefinitely. As long as the receiving TCP continues to >> send acknowledgments in response to the probe segments, >> the >> sending TCP MUST allow the connection to stay open. >> >> DISCUSSION: >> It is extremely important to remember that ACK >> (acknowledgment) segments that contain no data are >> not >> reliably transmitted by TCP. If zero window >> probing is >> not supported, a connection may hang forever when an >> ACK segment that re-opens the window is lost. >> > This tells me that the concern was with ACK's getting lost in the > network and that is why the need to keep the connection open. The > point we bring up in the draft is in the case the ACK's are being > received reliably then the need to keep the connection open just to > make sure the ACK has made it to the other end goes away. That is > why the request to change the language to say that in case of > reliable ACK, TCP MAY tear the connection down if it is not able to > service existing or new connections. You are misreading this. This section (4.2.2.1) has two requirements: 1) Zero Window Probing must be supported (to guard against lost window updates), and 2) as long as you get responses to the ZWP, you must keep the connection open. That's it. You aren't keeping it open to get lost ACKs, you're keeping it open because the other side of the connection is still there and responding. -David Borman _______________________________________________ tcpm mailing list tcpm@ietf.org https://www1.ietf.org/mailman/listinfo/tcpm
- [tcpm] Is this a problem? Mahesh Jethanandani
- RE: [tcpm] Is this a problem? Caitlin Bestler
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Mahesh Jethanandani
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? Mahesh Jethanandani
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Florian Weimer
- Re: [tcpm] Is this a problem? John Heffner
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? speakeasy
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Ethan Blanton
- Re: [tcpm] Is this a problem? Lloyd Wood
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Ethan Blanton
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Ethan Blanton
- Re: [tcpm] Is this a problem? Mahesh Jethanandani
- Re: [tcpm] Is this a problem? Ethan Blanton
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Mahesh Jethanandani
- Re: [tcpm] Is this a problem? Ted Faber
- RE: [tcpm] Is this a problem? Caitlin Bestler
- Re: [tcpm] Is this a problem? John Heffner
- Re: [tcpm] Is this a problem? Mark Allman
- Re: [tcpm] Is this a problem? Mark Allman
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? Mark Allman
- Re: [tcpm] Is this a problem? MURALI BASHYAM
- Re: [tcpm] Is this a problem? Mark Allman
- Re: [tcpm] Is this a problem? Lloyd Wood
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Mark Allman
- Re: [tcpm] Is this a problem? Chandrashekhar Appanna
- Re: [tcpm] Is this a problem? Ethan Blanton
- Re: [tcpm] Is this a problem? Mahesh Jethanandani
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Ethan Blanton
- Re: [tcpm] Is this a problem? Chandrashekhar Appanna
- Re: [tcpm] Is this a problem? Mark Allman
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- Re: [tcpm] Is this a problem? Lloyd Wood
- Re: [tcpm] Is this a problem? Lloyd Wood
- Re: [tcpm] Is this a problem? Joe Touch
- Re: [tcpm] Is this a problem? Lloyd Wood
- Re: [tcpm] Is this a problem? Jakob Heitz
- Re: [tcpm] Is this a problem? Ethan Blanton
- Re: [tcpm] Is this a problem? Chandrashekhar Appanna
- Re: [tcpm] Is this a problem? Ted Faber
- Re: [tcpm] Is this a problem? Ted Faber
- Summary of responses so far and proposal moving f… Anantha Ramaiah (ananth)
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Ted Faber
- Re: Summary of responses so far and proposal movi… John Heffner
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- Re: Summary of responses so far and proposal movi… Ted Faber
- Re: Summary of responses so far and proposal movi… Mahesh Jethanandani
- Re: Summary of responses so far and proposal movi… Mahesh Jethanandani
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Ted Faber
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Ted Faber
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Ted Faber
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- Re: Summary of responses so far and proposal movi… Ted Faber
- Re: Summary of responses so far and proposal movi… Ted Faber
- Re: Summary of responses so far and proposal movi… Joe Touch
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- Re: Summary of responses so far and proposal movi… Joe Touch
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Tom Petch
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- Re: Summary of responses so far and proposal movi… Joe Touch
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- Re: Summary of responses so far and proposal movi… Joe Touch
- RE: Summary of responses so far and proposal movi… Anantha Ramaiah (ananth)
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Mark Allman
- Re: Summary of responses so far and proposal movi… Mark Allman
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Mark Allman
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Mark Allman
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Mark Allman
- Re: Summary of responses so far and proposal movi… John Heffner
- Re: Summary of responses so far and proposal movi… Ted Faber
- Re: Summary of responses so far and proposal movi… Lloyd Wood
- Re: Summary of responses so far and proposal movi… Mahesh Jethanandani
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… Lloyd Wood
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: Summary of responses so far and proposal movi… David Borman
- Re: Summary of responses so far and proposal movi… weddy
- Re: Summary of responses so far and proposal movi… Mahesh Jethanandani
- Re: Summary of responses so far and proposal movi… Mahesh Jethanandani
- Re: Summary of responses so far and proposal movi… Ethan Blanton
- Re: Summary of responses so far and proposal movi… Ethan Blanton
- Re: Summary of responses so far and proposal movi… David Borman
- Re: Summary of responses so far and proposal movi… Mahesh Jethanandani
- Re: Summary of responses so far and proposal movi… Joe Touch
- Re: [tcpm] Is this a problem? Mahesh Jethanandani
- Re: Summary of responses so far and proposal movi… Erik Nordmark