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How To Troubleshoot Discovery Over A Managed Switch

Managed switches, a more powerful version of the basic network switch, can screen traffic on certain ports or protocols and may interfere with Room Alert communications.

Depending on how your managed switch is configured, a Room Alert Monitor connected to it may periodically become inaccessible on your network. In some cases, the IP address of the unit still responds to pings, and, typically, power-cycling the unit resolves the issue temporarily.

You may modify settings on the Room Alert itself to assist with this issue; you may also modify settings on your managed switch.

Modify your Room Alert's Ethernet Configuration settings

The instructions below show you how to change your Room Alert’s Ethernet configuration in the Settings–>Network tab to the following:

Ethernet Configuration

  • MTU Size: 512 (Note that this is the lowest setting for the maximum transmission unit size.)
    • This setting cannot be manually changed on Room Alert S models.
  • Auto Negotiate: Unchecked
  • Speed: 100 Mbps
  • Duplex: Full
  • Gratuitous ARP Broadcasts: Unchecked

To change your settings:

  1. First, open your Room Alert Monitor’s web interface. This FAQ shows you how: How To Open Your Room Alert Monitor’s Web Interface.
  2. Then navigate to Settings–>Network–>Ethernet Configuration . . .
. . . on a current Room Alert model. . . on a legacy Room Alert model
  • Select Settings in the navigation bar to the left.
  • Then select Network from the options below Settings.
  • In the Network Settings page, under Ethernet Configuration, enter the settings listed above for MTU Size, Auto Negotiate, etc..
  • Select Save Settings at the top or bottom of the screen. Your Room Alert Monitor will reboot with you new settings.
  • Select Settings in the navigation bar at the top of the screen.
  • Then select Network from the navigation bar to the left.
  • In the Network Settings page, under Ethernet Configuration, enter the settings listed above for MTU Size, Auto Negotiate, etc..
  • Select Accept Changes at the bottom of the page to temporarily save your settings.
  • Then select Save Settings in the navigation bar to the left. Your unit will reboot with its new settings.
Modify the settings on your managed switch

Adjust any settings on the switch that might interfere with Room Alert traffic.

Another option that may mitigate the issue is to place a hub in between the Room Alert Monitor and the managed switch. This way, the Room Alert Monitor negotiates with the hub rather than the managed switch.

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Room Alert is Made in the USA, ships worldwide from our locations in the US and EU, and has been protecting facilities since 1988.

You may find Windows Command Prompt at the following path:

  • Windows 7 & 8
    Start--> All Programs--> Accessories--> Command Prompt
  • Windows 10
    Start--> All Apps--> Windows System--> Command Prompt

To run Windows Command Prompt as an administrator:

  • Windows 7 & 8
    Right-click on Command Prompt and select Run as administrator.
  • Windows 10
    Right-click on Command Prompt, select More and then select Run as administrator.

Example Polling Method Properties saved in Orion SolarWinds:

If you are using this client, you should configure the general SNMPv3 Credentials, but leave the Read / Write SNMPv3 Credentials section blank.

Room Alert Link- Supported Firmware Updates



Current S modelsCurrent E models
Room Alert 32SRoom Alert 32E
Room Alert 12SRoom Alert 12E
Room Alert 4E
Room Alert 3E

Room Alert Manager - Compatible Devices

The latest version of Room Alert Manager supports only the devices below.

It does not support any legacy Room Alert or TemPageR models.

Current S modelsCurrent E models
Room Alert 32SRoom Alert 32E
Room Alert 12SRoom Alert 12E
Room Alert 3SRoom Alert 4E
Room Alert 3E
Room Alert 3W