TCB Control Block Sharing: 2140bis

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Presentation transcript:

TCB Control Block Sharing: 2140bis draft-touch-tcpm-2140bis-01 IETF 97 - Seoul Joe Touch, USC/ISI Michael Welzl, U. Oslo Safiqul Islam, U. Oslo Jianjie You, Huawei 4/20/2019 12:50 PM 4/20/2019 1

Copyright USC/ISI. All rights reserved. Changes from -00 Changes Added TCP option state TFO state – TCP Fast Open Cookie or a negative Fast Open Response in case of failure More discussion of problems related to sharing Relevant references related to ssthresh and RTT sharing issues added Current implementation status for TCB sharing now includes Windows (Thanks Praveen) and TFO Moved T/TCP text to the appendix 4/20/2019 Copyright USC/ISI. All rights reserved.

Copyright USC/ISI. All rights reserved. Deployment summary TCB data Status old_MSS Cached and shared in Linux old_RTT Cached and shared in FreeBSD old_RTTvar old PMTU Cached and shared in FreeBSD and Windows old TFOinfo Cached and shared in Linux and Windows old_snd_cwnd Not shared old_ssthresh Cached and shared in FreeBSD and Linux 4/20/2019 Copyright USC/ISI. All rights reserved.

Copyright USC/ISI. All rights reserved. WG work after adoption Proposed algs update TCP control block variables Details for specific TCP options Use case recommendations (only if BCP) Recommended do’s and don’ts for deployment 4/20/2019 Copyright USC/ISI. All rights reserved.

Copyright USC/ISI. All rights reserved. Issues for WG Request for TCPM WG adoption WG informational (2140 was informational) WG BCP (to support recommendations – see below) Details resolved in the WG after adoption Extended use case discussion Safer TCP control block info sharing equations Safe sharing related to specific options Recommendation “do’s and don’ts” (if BCP) 4/20/2019 Copyright USC/ISI. All rights reserved.