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Am Wed, 21 Sep 2016 21:29:13 +0200 |
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schrieb Kai Krakow <hurikhan77@×××××.com>: |
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|
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> Am Wed, 21 Sep 2016 07:30:40 -0700 |
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> schrieb Grant <emailgrant@×××××.com>: |
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> |
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> > [...] |
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> > [...] |
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> [...] |
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> > > |
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> > > If that device behaves badly in router mode by blocking just all |
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> > > icmp traffic instead of only icmp-echo-req, this is a good idea. |
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> > > You may want to bug AT&T about this problem then. It should really |
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> > > not block related icmp traffic. |
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> > |
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> > |
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> > Hi Kai, yesterday I switched my Gentoo router over to handling PPPoE |
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> > and pings seem to be working properly now. The AT&T device is now |
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> > functioning as a modem only and passing everything through. Today |
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> > I'll find out if it helps with TCP Queuing and (supposedly) related |
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> > http response slowdowns. |
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> |
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> You may want to set the default congestion control to fq-codel (it's |
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> in the kernel) if you're using DSL links. This may help your problem a |
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> little bit. It is most effective if you deploy traffic shaping at the |
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> same time. There was once something like wondershaper. Trick is to get |
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> the TCP queuing back inside your router (that is where you deployed |
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> pppoe) as otherwise packets will queue up in the modem (dsl modems use |
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> huge queues by default). This works by lowering the uplink bandwith to |
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> 80-90% of measured maximum upload (the excess bandwidth is for short |
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> bursts of traffic). Traffic shaping now re-orders the packets. It |
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> should send ACK and small packets first. This should solve your |
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> queuing problem. |
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> |
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> Between each step check dslreports.com for bufferbloat. I'm guessing |
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> it is currently way above 1000 ms while it should stay below 20-50 ms |
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> for dsl. |
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> |
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> The fq-codel congestion control fights against buffer bloat. But it |
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> can only effectively work if you're doing traffic shaping at least on |
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> your uplink (downlink may or may not be worth the effort depending on |
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> your use-case). |
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> |
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> Additionally, you can lower the priority of icmp-echo-reply this way |
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> so during icmp flooding your uplink will still work. |
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> |
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> This link may help you: |
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> https://www.bufferbloat.net/projects/codel/wiki/Cake/ |
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|
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And this: |
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https://github.com/tohojo/sqm-scripts |
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|
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-- |
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Regards, |
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Kai |
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|
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