[mythtv-users] HDHomerun and network problems?

[Steve MacLaren]

On 10/19/07, Patrick Ouellette <pat at flying-gecko.net> wrote:
>
> On Fri, Oct 19, 2007 at 12:16:08PM -0700, Michael Rice wrote:
> > Date: Fri, 19 Oct 2007 12:16:08 -0700
> > From: Michael Rice <mikerice1969 at gmail.com>
> > Subject: Re: [mythtv-users] HDHomerun and network problems?
> > To: Discussion about mythtv <mythtv-users at mythtv.org>
> >
> > On 10/19/07, John Welch <jrw3319 at gmail.com> wrote:
> > >
> > > Could be a totally different problem, but I had similar symptoms when
> I
> > > first setup an HDHR on my network and Myth backend.  I was banging my
> head
> > > against the wall trying to solve the problem because there were no
> obvious
> > > error messages or anything like that on either the backend or the
> frontend.
> >
> > Right.  I'd like to be know which piece of the network is having
> > trouble.  It could be the NIC in either the frontend or backend or the
> > router.  I don't know much about diagnosing networking problems.  Can
> > anyone point me to some tools or commands to use to help pinpoint
> > network problems like this?
> >
> > I thought from my investigations that a 100Mb network could handle 2
> > HDHR recordings plus streaming to a frontend.  Do others have this
> > setup working?
> >
> > Eventually moving to Gig and/or moving the HDHR to its own NIC is
> > probably a good idea but I'd like to make sure I understand the
> > bottleneck before I throw hardware at it.
>
> Your "switch" is doing a lot of work.  It is acting as a WAN link (I bet
> it is doing NAT & firewall too), acting as a wired 10/100 switch, and a
> wireless
> bridge.  My bet is it is not capable of sustained 100Mb/s throughput.  2
> HD streams from the HDHR (40-50Mb/s total) plus lets say 10Mb/s for the
> SD stream, filtering your internet traffic at 2-5Mb/s, and finally add in
> wireless broadcasting of the ssid and any internet traffic bridged to
> the wireless side, and any WEP or WPA on the wireless side.
> That's a lot of traffic for a consumer grade device.
>
> Either put the HDHR on a dedicated NIC, or get a gigabit switch (they
> are about as inexpensive as a 10/100 now - a 10/100 should work too) to
> separate your network into HDHR & Myth backend (off the new switch) and
> everything else (off your existing switch/router/whatever).
>
> I've been through all 3 configurations and can tell you I noticed a big
> difference when I added the second switch, and then a smaller (but still
> noticeable improvement) difference when I moved the HDHR to a dedicated
> NIC.
>
> By "separate your network into HDHR & Myth backend", do you mean a
separate subnet?  Or did you see improvement by simply inserting a switch
between those two nodes and the rest of the network (i.e. keep a "flat"
network)?
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