Submission doc.: IEEE 802.11-15/0791r0 July 2015 David Kloper, CiscoSlide 1 Addressing Simplifications Date: 2012-07-09 Authors:

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Presentation transcript:

Submission doc.: IEEE /0791r0 July 2015 David Kloper, CiscoSlide 1 Addressing Simplifications Date: Authors:

Submission doc.: IEEE /0791r0 July 2015 David Kloper, CiscoSlide 2 Abstract Several addressing-related comments want to make changes in how GLK handles frames, in the interest of simplicity. This submission discusses some of these simplifications and attempts to reach consensus before we close out those comments.

Submission doc.: IEEE /0791r0July 2015 David Kloper, CiscoSlide 3 3 SYNRA formats add complexity Re: CID210/ development has had significant focus on high performance (11n->ac->ax) Several chipsets/vendors are adding HW acceleration in DP GLK shouldn’t discourage this, or require HW changes as baseline Variable sized addresses have higher complexity SYNRA Types 1&2 are bytes long These are not well suited to HW acceleration These are more appropriate in Control Plane vs Data Plane This could be a barrier to adoption GLK may not be supported if T1&2 require HW changes….. or HW acceleration be globally disabled due to single GLK feature?

Submission doc.: IEEE /0791r0July 2015 David Kloper, CiscoSlide 4 Straw Poll #1 Would you support biasing SYNRA Type 0 more for the typical case? Replace 8b with 22b AID bitmap No AID offset (limiting to AID 1-22) No I/E subfield (only an explicit inclusion list) Assumption is most AP would support limited number of GLK Clients, and can assign to lower AID (from a reserved range) at association Yes: No: Abstain:

Submission doc.: IEEE /0791r0July 2015 David Kloper, CiscoSlide 5 Straw Poll #2 Would you support making SYNRA Type 1 & 2 Optional? Support for Types 1 & 2 would individually be indicated at association time Unsupported types are dropped by receiving Non-AP GLK STA Yes: No: Abstain:

Submission doc.: IEEE /0791r0July 2015 David Kloper, CiscoSlide 6 Straw Poll #3 Would you support dropping SYNRA Type 2? Redundant w/ Type 1 Possibly byte savings for atypical case (sparse matrix, typical is mostly all or exclude 1) Yes: No: Abstain:

Submission doc.: IEEE /0791r0July 2015 David Kloper, CiscoSlide 7 Usage of FromDS/ToDS bits (1 of 2) Re: CID149/151/218/233 Rational for using all 3 (or 4) combinations of FromDS/ToDS bits is really about saving 6 bytes More appropriate in WG focused/limited to lower speed links Consider Van Jacobson header compression/etc, for bigger savings Savings may be naïve assumption Many bridges run single IP stack over Bridged Virtual Interface (Cisco) or Bridge Net Device (Linux) Which MAC Addr does IP stack use? AP = Ethernet, per Radio, per SSID; Smartphone = WIFI, BlueTooth, Cellular, other;

Submission doc.: IEEE /0791r0July 2015 David Kloper, CiscoSlide 8 Usage of FromDS/ToDS bits (2 of 2) Bridging is the purpose that 4 address format was designed for Where is the DS when we are talking From or To? has specific filtering rules for ToDS and FromDS data frames Some HW may implement Rx filtering that prohibits a new definition, which GLK makes mandatory

Submission doc.: IEEE /0791r0July 2015 David Kloper, CiscoSlide 9 Straw Poll #4 Would you support limiting GLK to using 4 address format when sending to associated GLK peers? Other 3 combinations of ToDS/FromDS prohibited Yes: No: Abstain: