Film-Tech Forum ARCHIVE: Doremi ethernet ports

This is topic Doremi ethernet ports in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Richard May (Member # 2627) on 03-30-2012, 09:24 PM:

I have a dcp2000. Port eth0 works fine. The NEC projector is hooked up to it. Port eth1 won't communicate with anything. The port lights when plugged in on both ends.....(solid orange, blinking green). The IP addresses seem ok on both ports. They are a few numbers apart. I tried to ping both ports. That worked. I extracted the diagnostic log and sent it to Doremi. They said both ports show active, no problems. I tried new cables. Running out od ideas.....

Posted by Brad Miller (Member # 2) on 03-30-2012, 09:59 PM:

What are the two IPs assigned and what is the submask?

Posted by Richard May (Member # 2627) on 03-30-2012, 10:05 PM:

Eth0 192.168.10.115
Sub mask 255.255.255.0

Eth1 192.168.10.116
Sub mask 255.255.255.0

I tried different IP's for Eth1 and still nothing.

Posted by Scott Norwood (Member # 30) on 03-31-2012, 12:26 AM:

Do you have an IP conflict with something else on the same network?

Posted by Brad Miller (Member # 2) on 03-31-2012, 12:36 AM:

The reason I asked is because I assumed you were doing something along those lines. GDC can't handle that IP scheme (first 3 octets being the same). It will cause all kinds of problems. I'm not sure if Doremi can handle it or not. Doremi specifically recommends different subnets for the different ports. Has anyone used Doremi in a networked environment using the same subnet like this?

Posted by Jussi Siponen (Member # 5572) on 03-31-2012, 07:49 AM:

Richard,

What you are doing is not going to work.

If you put subnet mask 255.255.255.0 on both interfaces and the Eth0 IP address is 192.168.10.115, then the IP address of Eth1 can not beging with

E.g. putting 192.168.11.115 on Eth1 would be OK.

That being said, the easiest way to accomplish what I assume you are trying to do is to get an Ethernet switch and plug in to *that* the Doremi Eth0, projector, sound processor etc.

(If Doremi does things at all like Dolby, then the Eth0 interface is likely meant for a local, "screen area" network and the Eth1 interface is meant for connecting to the house LAN.)

But just from the standpoint of how IP addressing & subneting works, putting two 192.168.10.xxx addresses on your server's network interfaces will not work with your current subnet mask.

Posted by Dave Macaulay (Member # 813) on 03-31-2012, 08:02 AM:

I've never tried having the two ports on the same network segment, and there's no good reason to: the server only needs one connection to a network segment.
I'm not 100% certain but I think the server will bridge the two networks - if one is 192.168.1.1 and the other is 192.168.2.1, then you can ping a 192.168.1.xxx device from the 192.168.2.1 side. I can do this with the TMS networks I have installed but there's also a managed switch handling both networks (doing I-don't-know-what supplied through the VPF guys and password protected plus I don't know SFA about Cisco IOS and wouldn't know what it's doing even if I could read the setup files).
I've installed a bunch of TMS systems with a media network (content transfer) and a management network (the normal projector/server/automation/sound stuff) - with one on each server port - and the third IP address octets are always different. But they use a 255.255.254.0 netmask as well...

Posted by Marco Giustini (Member # 4544) on 03-31-2012, 08:34 AM:

I can confirm that Jussi is right. IP families must be different even though I believe ETH1 is supposed to be connected to the auditorium network. Not a big deal, I think it's just a matter of speed. You can connect your gear in any order and it should work.

Posted by Pete Naples (Member # 761) on 03-31-2012, 12:45 PM:

Doremi is OK if the subnet masks on both ports are the same, this is how XDC require equipment to be addressed, for uniformity and for NAT purposes back to their NOC.

However, they don't have the first three octets matching, they do;
172.20.2x.y1 for 'auditorium' network where x = screen Nº and y = kit, eg server =1, projector =2 etc

and

172.30.2x.11 for the 'theatre' side of the server.

Both on 255.255.0.0

But yup, manufacturers don't recommend running both networks on the same subnet as rule of thumb.

I've never successfully and reliably managed to get a Doremi to route between the two networks, Dolby on the other hand so this out of the box.

Posted by Marco Giustini (Member # 4544) on 03-31-2012, 03:08 PM:

Pete,

I think you need to install the IP forward package, it's an optional one you can find on doremi FTP. It is not installed as a standard.

Posted by Pete Naples (Member # 761) on 04-01-2012, 05:36 AM:

Good tip, thanks Marco.

Posted by Richard May (Member # 2627) on 04-01-2012, 03:33 PM:

Sorry for the delay. I've been out all weekend. There is no network hooked up. The only thing hooked up to ETH0 is the NEC projector. I will try changing those IP numbers like suggested.

My other question was going to be whether or not I could just hookup the Doremi, projector, and automation controller to a network switch like someone suggested.

Posted by Pietro Clarici (Member # 4937) on 04-01-2012, 05:14 PM:

Our Doremi servers all have this configuration:

eth0: 192.168.0.x3, sub 255.255.255.0
eth1: 192.168.0.x4, sub 255.255.255.0

(x is the auditorium number)

That being said, only eth0 is actually used, connected to a separate GigE switch for each screen. Projector (.x1 and .x2), JNIOR (.x5), CP650/750 (.x6) and a wireless AP (.x0) are all on the same network, and even though we don't have a TMS, the booth switches are hooked up to a central switch. This allows use to move content and have a single control point which is a basic PC running VNC, NEC and Dolby software. If needed, we can then connect to that machine via VNC (we usually use iPads), and fine tune projectors directly from the auditorium.

Posted by Richard May (Member # 2627) on 04-01-2012, 07:32 PM:

I think a network switch will be the easiest way at this point. Can I just get a cheap, basic switch?

Posted by David Buckley (Member # 2600) on 04-01-2012, 09:08 PM:

quote: Richard May
I think a network switch will be the easiest way at this point. Can I just get a cheap, basic switch?

Sure. But if ETH0 is just connected directly to the projector then just changing to a different subnet (e.g. 192.168.2.whatever) will be cheaper.

The confusion is due to the two ports being assigned to the same subnet and being connected to two different places (ie the two ports dont connect to the same network). Fix either issue and all will be well.

Posted by Dave Macaulay (Member # 813) on 04-01-2012, 09:14 PM:

Yes, any 100baseT ethernet hub or switch will work. The projector and server have 1gig ethernet ports, so you can use a 1gig switch and cat6 cables but you don't have to. There's not much data so 100mbit is plenty.
If you want to connect several servers for media transfer, you should use 1gig switch and cat6 for that network (it is a separate network with separate cabling, using the other server port) this makes transfers ~10x faster.

Posted by Richard May (Member # 2627) on 04-02-2012, 05:55 AM:

Thanks David, Dave and everyone else. I'll try changing the IP configuration first. I'll let you know in a few days when I get back to the theater.

Posted by Richard May (Member # 2627) on 04-05-2012, 11:17 AM:

Okay. It gets better.........

I changed the IP on ETH1 to 192.178.11.120 and the Jnior still didn't respond. With that IP still in there, I switched cables so the NEC projector was now on ETH1 and the Jnior was on ETH0. Both worked.............until I rebooted. Now ETH1 is not responding again. I did it multiple times, changing the IP on ETH1. Evry time worked until I shut down or rebooted. It DID save the IP change every time........going to buy a switch now.....

Posted by Richard May (Member # 2627) on 04-05-2012, 03:17 PM:

Switch works fine from ETH0......