<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Dear All,<div class=""><br class=""></div><div class="">I use free thinkbroadband's, latency/availability monitoring (broadban quality monitoring BQM, free after a free registration*)service, which runs ICMP probes from a dedicated box in London IIRC against all registered IPv4-addresses/domain names. Yesterday, my dsl-modem and the DSLAM decided they do not like each other and the modem was in idle_request status for several hours from afternoon to evening. Interstingly the latency probe was continuing, but now not against may router, but against the german Telefonica/O2 customer who got my old dynamic IP address assigned:</div><div class=""><br class=""></div><div class=""><a title="Broadband Ping" href="<a href="https://www.thinkbroadband.com/broadband/monitoring/quality/share/889b0c5ebab7cd432400d55e6c414b6f6658e278-09-06-2020" class="">https://www.thinkbroadband.com/broadband/monitoring/quality/share/889b0c5ebab7cd432400d55e6c414b6f6658e278-09-06-2020</a>"><img alt="My Broadband Ping - sesaokjole" src="<a href="https://www.thinkbroadband.com/broadband/monitoring/quality/share/889b0c5ebab7cd432400d55e6c414b6f6658e278-09-06-2020.png" class="">https://www.thinkbroadband.com/broadband/monitoring/quality/share/889b0c5ebab7cd432400d55e6c414b6f6658e278-09-06-2020.png</a>" /></a><br class=""><br class=""></div><div class="">As a belts AND suspenders measure I also try to attach an image, but am not sure whether the list will like that...</div><div class=""><img apple-inline="yes" id="BDB80FA6-0647-4CC5-8CF8-B830AE9E0E2C" src="cid:A898249B-D380-4A72-ACD8-AC5F655D8BB0@dpz.lokal" class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">From 12:30 to ~21:00 on the plot my modem was out of sync and hence these probes must have been reflected from somebody else's router in Germany in the same ISP's network as my link. As the green, blue and yellow lines indicate that access link suffers much worse from variable latency (and from 19:30 - 21:00 also from some packet loss). I believe I have forgotten how bad internet access can be without competent AQM to make performance under load acceptable.</div><div class=""><br class=""></div><div class="">So here is to all who worked hard to diagnose, understand and to remedy bufferbloat.</div><div class=""><br class=""></div><div class="">Best Regards</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>Sebastian</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">*) This is similat to dslreports smokeping service, except it is closer for european users and it allows domain names instead of fixed IP-addresses and will by default run wiyhout a time limit, the reporting is not half as nice as with dslreports, but for free it is quite marvelous.</div></body></html>