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<p style="margin: 0 0 1em 0; color: black;">LEDBAT is often used for
scavenger traffic - things that should not detract from normal Internet
use. There are two effects, latency and bandwidth. While AQM solves the
latency problem, it removes the ability of LEDBAT to not impact bandwidth
during peak usage. </p>
<p style="margin: 0 0 1em 0; color: black;">Simon </p>
<p style="margin: 0 0 1em 0; color: black;">Sent with AquaMail for Android<br>
<a href="http://www.aqua-mail.com">http://www.aqua-mail.com</a></p>
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<p
style="color: black; font-size: 10pt; font-family: Arial, sans-serif; margin: 10pt 0;">On
May 18, 2015 8:09:39 AM dpreed@reed.com wrote:</p>
<blockquote type="cite" class="gmail_quote"
style="margin: 0 0 0 0.75ex; border-left: 1px solid #808080; padding-left: 0.75ex;"><font
face="times new roman" size="2"><p
style="margin:0;padding:0;font-family: 'times new roman'; font-size: 10pt; word-wrap: break-word;">I'm
curious as to why one would need low priority class if you were using
fq_codel? Are the LEDBAT flows indistinguishable? Is there no
congestion signalling (no drops, no ECN)? The main reason I ask is that
end-to-end flows should share capacity well enough without magical and
rarely implemented things like diffserv and intserv.</p>
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<p
style="margin:0;padding:0;font-family: 'times new roman'; font-size: 10pt; word-wrap: break-word;"><br
/><br />On Monday, May 18, 2015 8:30am, "Simon Barber"
<simon@superduper.net> said:<br /><br /></p>
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<p style="margin:0;padding:0;margin: 0 0 1em 0; color: black;">I am likely
out of date about Windows Update, but there's many other programs that do
background downloads or uploads that don't implement LEDBAT or similar
protection. The current AQM recommendation draft in the IETF will make
things worse, by not drawing attention to the fact that implementing AQM
without implementing a low priority traffic class (such as DSCP 8 - CS1)
will prevent solutions like LEDBAT from working, or there being any
alternative. Would appreciate support on the AQM list in the importance of
this.</p>
<p style="margin:0;padding:0;margin: 0 0 1em 0; color: black;">Simon</p>
<p style="margin:0;padding:0;margin: 0 0 1em 0; color: black;">Sent with
AquaMail for Android<br /><a
href="http://www.aqua-mail.com">http://www.aqua-mail.com</a></p>
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<p
style="margin:0;padding:0;color: black; font-size: 10pt; font-family: Arial, sans-serif; margin: 10pt 0;">On
May 18, 2015 4:42:43 AM "Eggert, Lars" <lars@netapp.com> wrote:</p>
<blockquote class="gmail_quote"
style="margin: 0 0 0 0.75ex; border-left: 1px solid #808080; padding-left: 0.75ex;">On
2015-5-18, at 07:06, Simon Barber <<a class=""
href="mailto:simon@superduper.net">simon@superduper.net</a>> wrote:
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<blockquote class="">
<div class=""><span class=""
style="font-family: Menlo-Regular; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; float: none; display: inline !important;">Windows
update will kill your Skype call.</span></div>
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<br class="" />
<div class="">Really? AFAIK Windows Update has been using a LEDBAT-like
scavenger-type congestion control algorithm for years now.</div>
<div class="">Lars</div>
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