IP conflict after power cut

[Sim24]

I have around 7 camera in the system and things had been working great for last three years. Had a power cut recently (which is rare in my area), although the NVR is on a UPS but it ran out of battery before the supply was restored. After the power was restored only 3 out of 7 cameras came back online. I could see there was an ipconflict as the system is on DHCP, I reset the cameras and tried lot of things but I still cannot get these four cameras to work. What am I missing.
1) Camera are connected directly to NVR (POE)
2) NVR is assigning the IPs to cameras (DHCP) (10.1.1.x)
3) NVR is assigned an IP from my regular home router. (192.168.68.x)
4) I can login and access the NVR and three cameras from my macbook without a problem
5) I have never used Dahua utility before, but tried it this time and it does not identify any camera (connected MacBook directly to one of poe ports on the NVR so it could be in same network, ip was assigned correctly to the laptop by the NVR but it could find nothing)

Image attached. right now system is not even detecting two cameras and two are showing as red even thou the ip is no longer in conflict (after hard reset of camera)

Majority of these missing 4 camera are: EmpireTech IPC-Color4K-T 4K Full-color Ultra Low Light 8MP 1/1.2"
NVR: EmpireTech NVR 32Channel, NVR5232-16P-4KS2E

Please suggest what should I try, what am I missing here.

 

[bigredfish]

Couple more notes

• reboot the nvr
• the camera showing port 37777 is using the wrong port. That is the port used for cameras connected to an external switch. I would factory default that one at the camera with the button in the sd card access door while connected to the NVR
• red button shows good ip assigned, first thing is to verify the password is the correct one. You can use the little pencil icon to edit the password. This doesn’t change the pw , it simply tells there NVR what pw the camera is using
• factory default on a camera should force it to adopt the NVR admin password. It’s wise to keep all camera pw’s the same as the NVR admin pw
• Is port#3 empty?
• Was lightning involved or some other surge?

 

[Revo2Maxx]

Some of these NVRs work in blocks of 4, So if you happen to put your laptop on port 16 that would only give you info on 13, 14 and 15 if so connected. The one showing 37777 as said before is normally port for Private Dahua or other OEMs of Dahua that didn't change to something different like Lorex, One thing could try is changing ports from where the cameras were working before to other open ports of the NVR seeing you have a 16ch POE NVR.. 32ch with 16ch on normal network.. Might be damaged cameras or ports and one way to confirm is trying an open port.. Another way is to test camera with 12v power supply connected to normal network router/hub/switch and see if the Dahua IP tools can find the cameras on your local network. NVR POE ports can go bad but normally from most of the ones I have delt with takes out 4 ports at a time. Did have one that took out 8 of 16 ports but that was different circuit fault.

 

[bigredfish]

Agree on banks of 4 ports, have seen that also, but not port 1, 9, 13 etc

 

[Sim24]

Thank you for your responses, seems like we are back up and running on all. This is what worked out in the end
1) Removed all cameras from NVR which were NOT working
2) Attached these one at a time to NVR and did a hard reset on each camera and did a full shutdown and reboot of NVR
This resolved the issue on 3 cameras but one camera just refused to come back up. It continued to have ipconflict with an imaginary camera on a port to which nothing was attached. At this point it seemed like NVR was having issues and was keeping some kind of cache on the port to which camera was previously attached.

3) Reset the camera again, it won't even initialize at this point. Removed the offending camera from the NVR overnight
4) Attached the camera in the AM after 12 hours, and attached it to same port as it was before, rebooted NVR and everything resolved on its own.

It looks like there was some kind of caching with NVR and moving the cameras around to different ports did not help either.

I still can't get Dahua utility to work even after attaching it to 4 port grouping. Will try with a non Mac machine and report back.
Thanks again

 

[bigredfish]

I haven’t used the Dahua utility since mebbe 2018. Lots of cameras and systems since then