Dahua CCTV system "failed to find host network"
- Thread starter ashking11
- Start date
bigredfish
Known around here
Could be a bunch of things
- Check cables to those cameras are plugged in and not damaged somewhere
- Temporary glitch in your PoE switch, try reboot of the NVR
- Failing internal PoE switch
- Log into NVR and see what they camera registration page is showing
- Any recent construction or critters in the attic?
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Thanks for your reply, the system hasnt been used for a while - would a factory reboot help?
bigredfish
Known around here
bigredfish
Known around here
Mark_M
Known around here
As said implied by bigredfish, 'unable to find network host' means the NVR cannot find the camera and connect to it.
Compared to bigredfish's photo.... you have NVR GUI 4.0 version (red bell for TiOC function). So your camera status web UI will look like this:
In the corner of your camera, you will notice a little RJ45 port symbol.
This means the NVR recognises this channel is a camera connected directly to the NVR's built-in POE switch.
No RJ45 symbol means the camera is powered off and/or not responding to data.
My guess is your installer setup each camera manually rather than letting the NVR handle DHCP leasing and automatic plug & play.
So the NVR thinks each camera has a static IP address (the numbers shown on each channel) but it cannot find a camera on that address.
Try searching for devices and see if the NVR finds them all.
If your NVR does find all the cameras; delete all the un-connected entries first, then select all the found cameras and add them back.
Compared to bigredfish's photo.... you have NVR GUI 4.0 version (red bell for TiOC function). So your camera status web UI will look like this:
In the corner of your camera, you will notice a little RJ45 port symbol.
This means the NVR recognises this channel is a camera connected directly to the NVR's built-in POE switch.
No RJ45 symbol means the camera is powered off and/or not responding to data.
My guess is your installer setup each camera manually rather than letting the NVR handle DHCP leasing and automatic plug & play.
So the NVR thinks each camera has a static IP address (the numbers shown on each channel) but it cannot find a camera on that address.
Try searching for devices and see if the NVR finds them all.
If your NVR does find all the cameras; delete all the un-connected entries first, then select all the found cameras and add them back.
DHI-NVR4232-16P-4KS2/L ,please my 32 channel NVR is displaying failed to connect to network host . The first 16b cameras connected direct to the NVR and additional 8 cameras connected to an external Netgear 24 port POE switch. All working but after 2 years this error message came up and all cameras went off with the failed to find network host being displayed on all 16 channels and service returned message error on the channels of the cameras on external Netgear switch displayed on the CCTV monitor.
Who can assist
Who can assist
I recently had this happen to me, and I checked a few things to diagnose the issue.
Firstly, I opened the NVR and checked the connection for PoE power (the location and connector will vary by NVR). In my case, the connection was good, but I disconnected it and reconnected just to be sure.
Secondly, I went to the Camera section of the menu, as @Mark_M posted in his first photo, then I selected PoE from the left hand menu. At the top of that screen, I saw that the power draw was 0 W.
This is how I verified that the internal PoE Switch had failed (which is one of the suggestions from @bigredfish). Not great news, but I hope this helps.
Firstly, I opened the NVR and checked the connection for PoE power (the location and connector will vary by NVR). In my case, the connection was good, but I disconnected it and reconnected just to be sure.
Secondly, I went to the Camera section of the menu, as @Mark_M posted in his first photo, then I selected PoE from the left hand menu. At the top of that screen, I saw that the power draw was 0 W.
This is how I verified that the internal PoE Switch had failed (which is one of the suggestions from @bigredfish). Not great news, but I hope this helps.
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jayv
Young grasshopper
Good evening! Having a similar issue. I was wondering if anyone could help me please! One of my Dahua cameras has suddenly gone offline and it says 'Failed to find network host' I tried to remove the camera and when I did it couldn't find it, so I had to manually add it back, pop in my password to connect but still comes up as offline. Any help would be appreciated!! Thank you!!
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bigredfish
Known around here
Port 37777 says you manually added it. Won’t work on the built in Poe ports.
Delete it, then While plugged in , use the factory reset button on the camera inside the sd card door and hold it for 30 seconds.
Then wait and let the NVR find it by itself and move to the bottom pane automatically. Don’t force/manually add
Delete it, then While plugged in , use the factory reset button on the camera inside the sd card door and hold it for 30 seconds.
Then wait and let the NVR find it by itself and move to the bottom pane automatically. Don’t force/manually add
jayv
Young grasshopper
Thank you very much!! I shall give e this ago!! I got in touch with the guy who installed he said this to me below:
Hi mate the camera creates it’s on address once installed and will require the port clearing and a hard reset on the camera itself to reinstall to the system. Just deleting and adding again won’t allow it back on as it needs its address resetting locally on the camera. It has a reset button on the camera itself. If you delete the info off the port. Reset the camera and plug back in it will find itself automatically if there isn’t a problem with the cable/connections/camera/recorder
Im assuming that's the same as what suggested? I can't seem to get near the camera as it's too dark atm. But ive fully powered the whole system down gunna wait a few minutes and power it all back up again see if it automatically finds the camera. Also assuming deleting the info of the port means just deleting the whole camera?
Hi mate the camera creates it’s on address once installed and will require the port clearing and a hard reset on the camera itself to reinstall to the system. Just deleting and adding again won’t allow it back on as it needs its address resetting locally on the camera. It has a reset button on the camera itself. If you delete the info off the port. Reset the camera and plug back in it will find itself automatically if there isn’t a problem with the cable/connections/camera/recorder
Im assuming that's the same as what suggested? I can't seem to get near the camera as it's too dark atm. But ive fully powered the whole system down gunna wait a few minutes and power it all back up again see if it automatically finds the camera. Also assuming deleting the info of the port means just deleting the whole camera?
bigredfish
Known around here
Delete the entry for the camera
Go to the physical camera and open it up where the SD card door is held by two screws and press the tiny black button down for 30 seconds WHILE POWERED
You can turn the NVR OFF/ON 3456 times and it wont factory reset the camera.
jayv
Young grasshopper
Ok great! T hanks for the clarification! I shall give this a go tomorrow. I will keep you posted! Many thanks again!
jayv
Young grasshopper
Morning! I just opened up the camera and hit the reset button for 30s. Came back to the web service, refreshed it but it's doesn't seem to be picking it up automatically?
jayv
Young grasshopper
UPDATE: Got it working!! Thanks so much!! The ethernet cable had come out! So popped it back in! Hopefully stays in now! Thanks again!
Just a quick one, it's saying there is an update for the cameras. Is it worth doing? Thanks
Just a quick one, it's saying there is an update for the cameras. Is it worth doing? Thanks
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