[mythtv-users] link-local and mythtv

[John Pilkington]

On 05/08/15 20:10, Stephen Worthington wrote:
> On Wed, 5 Aug 2015 09:46:25 -0400, you wrote:
>
>> On Wed, Aug 5, 2015 at 5:07 AM, John Pilkington <J.Pilk at tesco.net> wrote:
>>> Thanks for that, Stephen.  But if I set 127.0.0.1, the TV will display the
>>> UPnP server menu with titles of the recordings, but doesn't show thumbnails
>>> or play recordings.  If I set 169.254.10.241, everything works while the TV
>>> is 'on' but I get complaints or worse when it's in standby.  The only
>>> connection between laptop and TV is an ethernet crossover cable.
>>>
>>> ifconfig, and mythtv-setup, also show a wlan0, the wifi hotspot, but I don't
>>> think I should let myth use that.
>>>
>>> No big deal, but I thought I would ask.
>>
>> You should be able to set up mythtv to listen on 127.0.0.1, then use
>> iptables to NAT the 169.254.10.241 traffic to 127.0.0.1.  You should
>> be able to configure your ethernet device to set this up automatically
>> when the interface is configured.  Then it should just work whenever
>> that interface is available.
>>
>> Eric
>
> I am not sure that using NAT (not masquerading) rules would work, as
> the lo interface normally runs with a big MTU (mine is showing 65536).
> Any packets larger than the MTU of the ethernet interface (likely
> 1500) would get dropped, which would probably cause some quite hard to
> track down type problems.
>
> But I have just looked at the ifconfig output for my MythTV box
> (Mythbuntu 14.04), which has static addresses on two ethernet ports
> that are currently unused, with no cable plugged in, and the static
> addresses are visible.  I could have sworn that even static addresses
> disappeared when an interface was down, but maybe something has
> changed since I last looked.  Anyway, if you can assign a static IP
> address to the TV through its settings somewhere, then you can use a
> static IP address on your ethernet interface and have MythTV listen on
> that.  If your TV does not have a setting for a static IP address,
> then you may have to run a DHCP server on the laptop and have it
> assign the TV an appropriate address when it is on.  If the TV only
> does link-local addresses, then you are probably out of luck, but that
> is unlikely.

Thank you both.  I will investigate this more, but that might not fit 
easily into the schedules and my movements.  I'll post again if I find 
something useful.

Cheers,

John