I have an ePMP sector that cnMaestro was showing offline this morning. The unit is online but in the unit cnMaestro Connection Status it says Invalid Serial No. I tried to remove the unit from cnMaestro to see if it would reconnect but it's telling me the same thing. It removed from cnMaestro jus…

Emilio after getting off the phone with you I realized my pings were not going through because I was not giving them a good enough TTL value. I managed to get all of my CPS to come back up by just simply going into the Units themselves and re-entering my ID and onboarding password. Even if it i…

Topicotto, Can you please try to perform the PING test from the ePMP device user interface. Usee Tools --> Ping page. Try to ping both "google.com" and "cloud.cambiumnetworks.com". If Ping fails, can you check your DNS settings on the device?

Showing the same thing, was there a system change at the end of last week? Approx 3 days 12 hours ago? That's when I'm showing them going offline. I have 20+ devices that are showing offline. I just checked and they are all Force 180's with a 12 digit serial number.

PING us-east-1-rtr-1-946191991.us-east-1.elb.amazonaws.com (52.5.95.225) 32(60) bytes of data. 40 bytes from ec2-52-5-95-225.compute-1.amazonaws.com (52.5.95.225): icmp_seq=1 ttl=47 time=100 ms Looks good.

Ya that's weird, I wonder why that is? It looks like it lost it's configuration or something? I haven't done anything on my end. (firmware or network changes) Reboot doesn't fix it, but going under config / system / remote managment and entering the credentials again works. It goes to pending appro…

Good to see that it worked for you as well. I had issues with my AP taking. I had to give it ID and number so it would give me an incorrect ID error. Then go back in and re enter my correct ID and it took.

Re-entered Cambium ID and Onboarding Key and all units reappeared right away, curiously all with the same session uptime of 1 day, 2 hours and 10 minutes as of 6:55pm EST. I did the pings to google and cambiumnetworks on 1 device before re-entering the ID and the pings worked...anyway, problem reso…

We identified one of the problem for existing devices which were onboarded but later point in time when device get disconnect from cnMaestro, it starts complaining "Invalid Serial No". We have fixed this issue, all your devices should connect back without giving any error. Regards, Rupam

We too are having trouble with multiple ePMP's saying "Invalid Serial Number" in the cnMaestro Connection Status page on the ePMP's. Due to the problems with the false DFS firmware, we are running Version 2.6.2.1. Was the fix that you referred to in cnMaestro or in some version of ePMP firmware? …

I can see this error in our logs, and I believe it is a missing entry in our database. We should be able to fix it by tonight. If you need to onboard the device now, you should be able to use the Cambium ID method as an alternative.

This issue is fixed from cnMaestro end and can you please retry it

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cnMaestro Connection Status: Invalid Serial No

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