[RndTbl] Shaw packet loss

[Sean Walberg]

It's not unreasonable to put rate limits on inbound ICMP traffic going to
the control plane of the router. But the VoIP loss is unacceptable, I agree.

Sean

On Tue, Oct 19, 2010 at 12:00 PM, John Lange <john at johnlange.ca> wrote:

> When the loss occurs it's all the way from hop 1 to the far end.
>
> They've used the "ICMP is at a lower priority" excuse before. It
> doesn't hold much water with me because that is essentially just an
> admission that the router is overload and has to start dropping stuff
> which would be fine if only ICMP got dropped but the packet loss is
> also happening on voice traffic.
>
> John
>
>
> On Tue, Oct 19, 2010 at 11:17 AM, Adam Thompson <athompso at athompso.net>
> wrote:
> > If MTR shows loss at hop 1 but *not* at hop 2, that's just their router
> ignoring your ICMP packets and doesn't actually indicate packet loss.
> >
> > *sigh*  I can't believe I'm defending Shaw...
> >
> > -Adam
> >
> > -----Original Message-----
> > From: John Lange <john at johnlange.ca>
> > Sender: roundtable-bounces at muug.mb.ca
> > Date: Tue, 19 Oct 2010 11:14:16
> > To: Continuation of Round Table discussion<roundtable at muug.mb.ca>
> > Reply-To: Continuation of Round Table discussion <roundtable at muug.mb.ca>
> > Subject: Re: [RndTbl] Shaw packet loss
> >
> > Just for reference; I use mtr for testing this.
> >
> > Here is the command line. As you can see, I've set a very aggressive
> > packet rate (20/second).
> >
> > # mtr -r -w -c 500 -n -i 0.05 www.google.ca
> >
> > I actually stick it in a loop so I can keep it running and see periodic
> results:
> >
> > # while true ; do date ; mtr -r -w -c 500 -n -i 0.05 www.google.ca ;
> done
> >
> > When I see loss, it's always at the first hop yet it doesn't seem to
> > matter which gateway it is. These are all Shaw business customers so
> > may not be affecting residential.
> >
> > John
> >
> > On Tue, Oct 19, 2010 at 10:57 AM, Mike Pfaiffer <high.res.mike at gmail.com>
> wrote:
> >> On 10-10-19 10:39 AM, Sean Walberg wrote:
> >>> On Tue, Oct 19, 2010 at 10:36 AM, Mike Pfaiffer<
> high.res.mike at gmail.com>wrote:
> >>>
> >>>
> >>>>         Then there is their policy of slowing down the entire
> connection if
> >>>> they determine someone is using bittorrent on a LAN (even if the user
> >>>> caps the up and down speeds)
> >>>
> >>>
> >>> Do you have a source for this? Are you sure it's not because you're
> starving
> >>> out your upstream and therefore not able to get ACKs out?
> >>>
> >>> Sean
> >>>
> >>
> >>        Give it a try. Grab a movie or something. Use a bittorrent client
> >> capable of capping the up and down speed. Ktorrent can do this. See what
> >> you can get for both up and down uncapped. Then try running say Firefox
> >> and look at its performance. Stop the bittorrent transfer and look at
> >> Firefox again in a few minutes. Set up a cap in bittorrent say 10K on
> >> both the up and down (bear in mind this is supposed to be a
> >> multi-megabit connection). Restart your bittorrent and see what happens
> >> with Firefox. You'll notice the bittorrent will transfer to what ever
> >> maximum you set while other programs will barely function on the
> >> internet. Local transfers on the LAN are fine though.
> >>
> >>                                Later
> >>                                Mike
> >>
> >>_______________________________________________
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> >> http://www.muug.mb.ca/mailman/listinfo/roundtable
> >>
> >
> >
> >
> > --
> > John Lange
> > www.johnlange.ca
> >
> > _______________________________________________
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> >
> >
> > _______________________________________________
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> >
>
>
>
> --
> John Lange
> www.johnlange.ca
>
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>



-- 
Sean Walberg <sean at ertw.com>    http://ertw.com/
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