[mythtv-users] Sudden issue with HDHomeRun on network switch?

[Greg Oliver]

On Fri, Mar 15, 2019 at 3:02 PM Tom Dexter <digitalaudiorock at gmail.com>
wrote:

> On 3/15/19, Simon Hobson <linux at thehobsons.co.uk> wrote:
> > Tom Dexter <digitalaudiorock at gmail.com> wrote:
> >
> > ...
> >> I have no idea what to make of that at all. I can only think that
> >> maybe the switch is going bad(?)
> >
> > It does sound rather like the switch. They can fail in "interesting"
> ways -
> > I've had them "sort of" stop passing packets reliably, as in passing some
> > packets but not others !
> >
> > Certainly in a case like this, the obvious thing to do is swap the switch
> > and see what happens.
> >
> > The fact that some devices work and others don't could be simply down to
> > slight variations in how the protocols are implemented. Behind the scenes
> > there's actually a complete (albeit relatively simple) signalling
> protocol
> > to allow the two ends to negotiate a link between them.
> > A few years ago we had a customer with 2 sites with a road in between. We
> > sold them an optical link which turned out to have an "interesting"
> design
> > feature which meant that it didn't work with all switches. The people who
> > supplied and installed it for us couldn't tell us what the issue was -
> but
> > we eventually tracked down that these units didn't negotiate the link
> > properly so they would only work with managed switched where the port
> can be
> > hard configured to a specific set of link parameters.
> >
> >
> >> Any recommendations are welcome. I was looking at a Netgear GS316
> >> which seem to get pretty good reviews.
> >
> > It's looks like it's a variant of their GS1nn models. I've always found*
> the
> > [FG]S1nn models to be very reliable, so I'd have no hesitation in trying
> the
> > 316.
> >
> > * With work hats on, I've known a lot of networks run on them.
> >
>
> Thanks for the reply! I think you're right on all that. I've had my
> existing switch for quite a while and it was really cheap. I might
> just go ahead and get that Netgear. Thanks for the recommendation!
>
> Tom
>

I work with Telephone switches and networks by day, and also have a lot of
projects I use raspberry Pis and PoE cameras for and I have been using
these cheap Zyxel switches for a while now ::

https://www.amazon.com/8-Port-Gigabit-Managed-Fanless-GS1900-8HP/dp/B00GU1KULM/ref=sr_1_1?keywords=zyxel+poe&qid=1552790568&s=gateway&sr=8-1

They are managed and have been very good for me delivering power to all 8
ports as well as fill line rate on all ports.  I am slowly replacing my
Cisco Small Business switches with them since the Cisco switches are not
PoE+ (AT) and my cameras require AT.

If you do try them out, be warned they have a qeird provisioning quirk that
even if you set a ports PVID, you also have to set that VLAN as untagged on
the membership page.  Most switches I have used automatically do that for
you and it took me an hour or so of packet captures to figure that out.

Just another vendor option for you.  Ubiquity also sells some switches I am
going to try next that are more modern in the software and allow you to run
SDN software to control them like all modern enterprise and carrier
switches.

-Greg
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