[mythtv-users] HDHomeRun Zero Byte Recording but work fine through HDHomeRun GUI

David Whyte david.whyte at gmail.com
Tue Sep 11 23:25:27 UTC 2012

On Wed, Sep 12, 2012 at 3:18 AM, MonkeyPet <monkeypet at gmail.com> wrote:
> Why the heck would you have two DHCP servers on your network?  Solve this
> problem first.

Hehe, I knew that question would get asked.  The reason was because I
was out of town for a period when the BE server went down in a lengthy
power cut and didn't turn on when power was restored as it is
configured to do.  So for a period of time I was away, the rest of the
family was stuck without internet access (which seems to have annoyed
them a lot).  It is possible to configure dhcp3-server in a
primary/secondary configuration, but the modem obviously doesn't
support that through the user GUI.  Now I have a raspberry Pi, I might
configure that as a backup secondary DHCP server and eliminate the
modem as a server.

> I remember mythtv didn't play nice when the HDHR IP address changes while
> mythbackend is still running.  My situation was that mythbackend started up
> prior to the HDHR obtaining a DHCP, so strangeness would happen.  I had to
> modify the init scripts to wait for the HDHR networking to stabilize before
> mythbackend starting.  However, this was several months back using 0.24.  I
> am not sure if any recent changes went into this area.

So, it seems like it is possible that the IP changed after the backend
made a connection to it.  Getting rid of the rogue DHCP server should
resolve the problem.

On Wed, Sep 12, 2012 at 3:29 AM, Ben Kamen <bkamen at benjammin.net> wrote:
> Which bring up another good point - "infrastructure" should not be on
> changing IP's. It's ok to use DHCP to configure them on boot, but things
> like all my manages switches and WAP's and HDHR are on assigned static
> addresses in DHCP

I agree.  My server statically assigns IP addresses to all of my
'infrastructure'...so long as the modem doesn't interfere!

On Wed, Sep 12, 2012 at 5:19 AM, Joseph Fry <joe at thefrys.com> wrote:
> What I don't understand is why your Cable Modem is on the same network
> segment as your HDHR or PC's?  You don't have some sort of router/gateway
> device?

On Wed, Sep 12, 2012 at 5:47 AM, Mike Perkins
<mikep at randomtraveller.org.uk> wrote:
> Or... firewall?

It is an ADSL modem that also does NAT and routing etc.  (
http://homesupport.cisco.com/en-us/support/gateways/AM300 ) I am no
network guru, but I believe this gives me adequate security.  Only a
couple of ports are exposed on the WAN side.  Any other inbound
traffic should get dropped.

Confirmation of my networking assumptions would be greatly
appreciated, since I don't want to expose myself, my family, or my
data, unnecessarily.


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