Devices or Livewire sources are missing

Updated 8 months ago by Bryan Jones

SCOPE

This scope of this document is fairly broad but generally applies to Windows computers running any type of software that needs to participate in Livewire. This includes, but is not limited to;

  • Axia IP Audio Driver
  • iProbe
  • iPlay
  • Pathfinder

These can really effect ANY product.

BACKGROUND

Every Axia device “advertises” itself on the network so that other Axia products can find them. Advertisement allows other hardware and software to discover the available sources on a device and if they are in use elsewhere (we call this allocation status). Sometimes when scanning, a piece of software may not “discover” anything. There are generally only a couple of things that cause this, and they are straightforward to correct.

SOLUTIONS

  1. Turn off or configure your firewall settings

There are many intrusions prevention software packages out there. Microsoft Windows Firewall, Norton, McAfee, Kaspersky, and many others can block inbound network traffic to your computer, and this can keep your software from “hearing” the multicast advertisement group on your Axia network. Our suggestion is to disable these, as a test, and then re-enable them with proper rules applied to allow this PC to communicate with the Axia network. You can find a detailed list of ports used so that you can create your own firewall rules in this Firewall Config document.

While this document applies specifically to Windows XP and the Windows firewall, the ports used remain the same no matter what OS or software package you use.
  1. Modify the “metric” used by the Axia network card.

Before proceeding with this step, it's best to verify that this is indeed a problem. To check, open a command prompt on your PC and type this command;

netsh interface ip show join <press enter>

You will see results similar to this graphic;

netsh interface ip show join.PNG
The multicast address of 239.192.255.3 (the advertisement multicast group) is correctly listed under the Axia Net (Green box).  Axia Net is the name given to this particular adapter in Windows. Yours may say something different. 

If the IP Address of 239.192.255.3 shows up listed under any network adapter other than the Axia network, then you need to continue with the following changes.  If the IP address of 239.192.255.3 shows up correctly, then you do NOT need to continue.

If you have gotten here, then navigate to where your network adapter settings are changed.  In Windows 7 and Windows 8, this is generally found by going to Control Panel, select Network and Sharing Center, and then clicking on Change adapter settings.  That should list any network cards in your system. 

Right-click on the network adapter used for Axia and choose Properties.  

Select Internet Protocol Version 4 as shown, then click the Properties button.

Ethernet Properties.PNG

Next, click on the Advanced button.

IP v4 Properties.PNG

On the Advanced dialog, uncheck the box next to Automatic Metric.

Advanced TCP Settings 1.PNG

Type a 1 into the Interface metric box, then click OK.

Advanced TCP Settings 2.PNG

Click OK on the remaining dialog boxes and then click CLOSE on the Ethernet Properties dialog.

Depending on your application, you may need to restart the entire PC as some software runs as a Windows service rather than an app. Most of the time, the only way to get it to re-subscribe to the multicast advertisement group, it to restart the application. If you are in doubt, simply restart the machine and then re-check your app to see if it is now working.

The Deeper Tech

The “metric” is a cost factor assigned to each network device in your system. Windows strives to use the lowest cost connections first. Many factors affect the automatically assigned metric, but in general, one gig network connections are thought to be better than 100 meg, full-duplex is better than half-duplex. Links with a gateway are lower cost than those without, etc. All of these things are factors in considering what “cost” (more accurately metric) is assigned, and a lower cost (Metric) is better.

Consider this; You need to get internet access to check e-mail. You have a cable modem, a cell phone connection, and a dial-up connection (I know, who has dial-up any more, but it works for this example). Your cable modem would have a Metric of 1, your cell phone connection would have a Metric of 2, and the dial-up would be a Metric of 3. By default, it would use the lowest “cost” of 1, so it would use the cable modem.

In the Axia world, we don’t want it to use a “best” one, we want it to use a “specific” one, so we set it manually to the lowest metric. Everything else in your system will continue to operate normally.

Please feel free to contact us using this form if you have any additional questions about this document.


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