OC300 unavailable after changing IP address

OC300 unavailable after changing IP address

OC300 unavailable after changing IP address
OC300 unavailable after changing IP address
2026-02-09 03:40:33 - last edited 3 hours ago
Model: OC300  
Hardware Version:
Firmware Version: 1.29.7

I'm adding a subnet to my system to hold all the network hardware (router, switches, APs, Omada Controller).

When I changed the controller's IP address, I forgot that I have a DHCP reservation for it, and instead, I changed it on the device.

After rebooting, the controller is offline. I get a timeout error when browsing to any of the IP addresses (the old IP address, the new IP address, or the fallback IP address).

I have used the recovery mode to install the same firmware.

 

Is a factory reset my only option? I don't want to do this as I don't have a recent configuration backup.

 

Thanks for your assistance!

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#1
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1 Accepted Solution
Re:OC300 unavailable after changing IP address-Solution
Yesterday - last edited 3 hours ago

  @Vincent-TP after running a scanner on each of the subnets involved, I found that the controller did change its IP address to what I was trying to set it up with.

 

as far as the OC300 is concerned, everything is working fine.

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#7
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7 Reply
Re:OC300 unavailable after changing IP address
3 weeks ago

Hi @Wayne110,

 

If you have physical access, you should be able to directly attach a host to the controller to access it.  Just manually set the hosts interface to a unique address in the same subnet that the controller is using.

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#2
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Re:OC300 unavailable after changing IP address
3 weeks ago

  @D-C 

I should be able to, but I can't. When connecting directly to Port 2 on the OC300, I cannot reach it at the old address, the new address, or the fallback address.

I've tried using NMAP to see if I can find it, but it doesn't show up.

 

Since the router is being controlled by the OC300, I can't log into that either.

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#3
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Re:OC300 unavailable after changing IP address
3 weeks ago

@Wayne110, you may need to unplug the cable from port 1 and power cycle it to force it to start up with the fallback IP. 

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#4
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Re:OC300 unavailable after changing IP address
3 weeks ago - last edited 3 weeks ago

  @Wayne110 

 

I have never tried this but I read on the internet (the link appears below) that you might be able to determine the controller's IP address by connecting a PC directly to the controller and running Wireshark.  Filter the arp packets and they may give you a clue.  It's odd that neither the old nor the new IP addresses respond.  It almost sounds like a typo error when you entered the new address.

 

Link:  support dot.wheatstone dot com/portal/en/kb/articles/using-wireshark-to-find-an-unknown-ip-address

 

 

 

1x ER7406 1x OC300 4x SG2008 1x EAP610 3x EAP650-Desktop 1x EAP772-Outdoor
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#5
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Re:OC300 unavailable after changing IP address
a week ago

Hi  @Wayne110 

 

Any update on this issue? Did you access the controller successfully?

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#6
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Re:OC300 unavailable after changing IP address-Solution
Yesterday - last edited 3 hours ago

  @Vincent-TP after running a scanner on each of the subnets involved, I found that the controller did change its IP address to what I was trying to set it up with.

 

as far as the OC300 is concerned, everything is working fine.

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#7
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Re:OC300 unavailable after changing IP address
3 hours ago

  @Wayne110 

 

Thanks for sharing the solution, and it's great to hear that the issue has been resolved! If you encounter any further problems or have additional questions, feel free to reach out. We're here to help! 😊

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#8
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