Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

Re: [8023-CMSG] PAR proposal



Title:
Benjamin,
 
Slide number 3: Is congestion is only caused due to oversubscription?  In the case of a aggregated uplink that is true, however congestion may arise from various causes i.g.  Head of Line blocking, on a downstream link, or link that maybe down etc...a queue may get congestion due to HOL etc...
Please see modified wording on the slide

Slide 6: Congestion Management may not  neccessarily improve latency. Example: Congestion Management implies congestion avoidance , i.e. that you could be done by rate limiting at the upstream node or holding off sending data (Pausing). IN either case that some of the packet will be delayed , so it does not neccessarily improve latency but improves throughput for packet that enter the network, because once congestion avoidance mechanisms are triggered we should not see TCP-IP retries , which slows down a system considerably.
 
regards
 

Asif Hazarika

Senior System Architect
Network Solutions, Fujitsu ME
1250 E Arques Ave Sunnyvale
CA 94088-3470
Phone: 408-737-5640
email: ahazarik@fma.fujitsu.com

 
 
 
 -----Original Message-----
From: Benjamin Brown [mailto:benjbrown@COMCAST.NET]
Sent: Friday, September 24, 2004 6:08 AM
To: STDS-802-3-CM@listserv.ieee.org
Subject: Re: [8023-CMSG] PAR proposal


Jose,

Thanks for your contribution of actual wording. I've modified the PAR
slides again to include the suggested changes.

All,

I've also included some suggested word changes (in red) as proposed
by Gary McAlpine that I missed earlier this morning. Please continue
your review.

Thanks,
Ben

Jose Morales wrote:
Ben,

I have explained my opinion in my previous mail. According it, this is my  proposal for wording changes:

>> To improve the performance of an 802.3 link in terms of latency and frame discard
>> in the presence of congestion.

>> Congestion due to oversubscription results in frame discards. This project will
>> enable an exchange of congestion control information, which will define a means
>> of decreasing frame discard and permit decreased latency.

I propose:

"To improve the performance of an 802.3 link in terms of latency and frame discard in order to avoid congestion.

In case that the congestión appears, this project will enable an exchange of congestion control information, which will define a means of decreasing frame flow and permit decreased latency."

In my experience, I think tat avoid congestion must be the main objective. According my idea, 802.3 must detect the traffic situation an will use 802.2 to control it.

Thanks

Jose
 

Benjamin Brown wrote:


All,

Thanks to those who responded, especially those with actual
wording changes. I've captured the new wording in additional
slides so everyone can see them in a common format. If there
are additional comments, please feel free to make them. We'll
need to choose between these, probably on Tuesday of next
week, in order to allow this project to move forward.

Thanks,
Ben
 

-----Original Message-----
From: owner-stds-802-3-cm@listserv.ieee.org
[mailto:owner-stds-802-3-cm@listserv.ieee.org] On Behalf Of Benjamin
Brown
Sent: Thursday, September 23, 2004 7:36 AM
To: STDS-802-3-CM@listserv.ieee.org
Subject: Re: [8023-CMSG] PAR proposal


Brad, Gadi, Matt, Asif,

Thanks for your review. I've captured Brad's suggested changes
in the first 4 slides of the new attached proposal. I then added a
5th slide which is a markup of the 4th with my changes in response
to some of Matt's comments. If everyone could take another look
at this and let me know what they think of the new document, the
proposed changes or anything else they can think of, I'd very much
appreciate it.

Regards,
Ben

Booth, Bradley wrote:

      
Ben and all,

Some feedback on this.

Cheers,
Brad

-----Original Message-----
From: owner-stds-802-3-cm@listserv.ieee.org
[mailto:owner-stds-802-3-cm@listserv.ieee.org] On Behalf Of Benjamin
Brown
Sent: Wednesday, September 22, 2004 4:03 AM
To: STDS-802-3-CM@listserv.ieee.org
Subject: [8023-CMSG] PAR proposal


All,

This is not a full cut at the PAR but covers the more interesting
pieces - Title, Scope, and Purpose. Please review and comment.
Again, this, or something similar, needs to be approved in Ottawa
next week in order to pre-circulate for approval at the WG level
in San Antonio in November. Please give this serious attention
and comment with actual suggested changes.

Thanks,
Ben

--
-----------------------------------------
Benjamin Brown
178 Bear Hill Road
Chichester, NH 03258
603-491-0296 - Cell
603-798-4115 - Office
benjamin-dot-brown-at-ieee-dot-org
(Will this cut down on my spam???)
-----------------------------------------



        

--
-----------------------------------------
Benjamin Brown
178 Bear Hill Road
Chichester, NH 03258
603-491-0296 - Cell
603-798-4115 - Office
benjamin-dot-brown-at-ieee-dot-org
(Will this cut down on my spam???)
-----------------------------------------

      
--
-----------------------------------------
Benjamin Brown
178 Bear Hill Road
Chichester, NH 03258
603-491-0296 - Cell
603-798-4115 - Office
benjamin-dot-brown-at-ieee-dot-org
(Will this cut down on my spam???)
-----------------------------------------

--
-----------------------------------------
Benjamin Brown
178 Bear Hill Road
Chichester, NH 03258
603-491-0296 - Cell
603-798-4115 - Office
benjamin-dot-brown-at-ieee-dot-org
(Will this cut down on my spam???)
-----------------------------------------

PAR_05-mod.ppt