Joined: 22 Aug 2009 Posts: 260 Location: New York State
Posted: Mon Sep 18, 2023 22:57 Post subject: Device gets dropped from Router after 30 sec w/ 2 addresses
Three issues;
1. After the device boots up it shows in the Status/LAN, the disappears after 30 seconds,
2. If I reboot it, it shows up on again but with 2 addresses;
192.168.1.4 (this I assigned by a static address)
192.168.1.51 (this was assigned by DHCP when the setting within the device was changed from static to DHCP)
3. With the device not connected, I re-looked at that Status/LAN page, the vlan2 entry shows a double entry;
xx.xxx.155.149 &
xx.xxx.155.1
Ok, what's wrong??
It's a TP Link Archer C7 V4 and the device is a CCTV DVR.
Joined: 21 Nov 2013 Posts: 62 Location: Cathedral City, CA, USA
Posted: Tue Sep 19, 2023 0:30 Post subject: Re: Device gets dropped from Router after 30 sec w/ 2 addres
videobruce wrote:
Three issues;
1. After the device boots up it shows in the Status/LAN, the disappears after 30 seconds,
2. If I reboot it, it shows up on again but with 2 addresses;
192.168.1.4 (this I assigned by a static address)
192.168.1.51 (this was assigned by DHCP when the setting within the device was changed from static to DHCP)
3. With the device not connected, I re-looked at that Status/LAN page, the vlan2 entry shows a double entry;
xx.xxx.155.149 &
xx.xxx.155.1
Ok, what's wrong??
It's a TP Link Archer C7 V4 and the device is a CCTV DVR.
+
I find this problem every once in a while when duplicates are created in the lease database, usually when setting up new machines or devices that grab leases before making final setups.
The best way I have is found is to erase the offending MACs and IP addresses. There is a shell program in /etc on the router called lease_update.sh you can cat the file to see the commands, but basically the command I run is: sh lease_update.sh del 00:11:22:33:44:55 192.168.20.20 replace with your device MAC and IP address. this will get them out of the nvram listing. Note have the device turned off so it does not try to get new address before getting all the duplicates out. Then add your static address and MAC address to your static address listing then the device should keep the one address and not cause issues when turned on. Make sure if your device is randomizing the MAC address each time this will cause the dupes and not assign the proper IP/MAC combo. _________________ Router/Version: Netgear R7800
File/Kernel: DD-WRT v3.0-r50671 std (10/26/22), Linux 4.9.330 #1313 SMP Wed Oct 26 05:13:03 +07 2022 armv7l
s/program/script* ... it's a shell script, and besides a proper power cycle, that is the most direct way to effectively resolve the double entry perhaps, but is the "static IP" a lease or is it a manually-set IP address on the DVR? Proper terminology helps avoid confusion. Also, the other double entry on vlan2 are probably upstream devices such as your upstream router or remote management PC and they show up randomly on the LAN status page, usually with an asterisk (*) as hostname. _________________ "The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep." - Robert Frost
"I am one of the noticeable ones - notice me" - Dale Frances McKenzie Bozzio
Joined: 22 Aug 2009 Posts: 260 Location: New York State
Posted: Tue Sep 19, 2023 11:42 Post subject:
Thanks for the replies, but I have no idea how to do any of that or even find that program. This device was a replacement for 2 others that I'm having trouble with, but those did not have this issue.
I was thinking of updating the F/W and using the reset defaults to clear the problem, but I really didn't want to go thru all those settings again since I have had this Router setup this way for many years w/o any known issue until now.
The Static IP was setup only on the DVR. I've never setup any addresses on the Router other than setting the range of the available static IP addresses available wired & wireless.
This "upstream router or remote management PC" you mentioned, I have no idea what either are as, I only have one Router and no remote management unless you are referring to the program for the DVR that communicates with it to retrieve recordings and provide viewing from a PC instead of a dedicated HDMI monitor.
Joined: 22 Aug 2009 Posts: 260 Location: New York State
Posted: Wed Sep 20, 2023 16:16 Post subject:
Ok, the 2nd IP address has disappeared with the vlan2 entry.
I performed a factory reset, rebooted, loaded the most recent F/W 9/8/23, rebooted. did a 2nd factory default reset. Did my few IP range settings, choose a wireless channel and set the static and DHCP ranges. That was about it in settings.
No change, the DVR does not show in the client list and the software does try to make a connection to Live View, but not to Playback.
I tried to ping the DVR using IE, the ping showed 3 out of the 4 'pings', but then closed before the process was complete.
I haven't used that function for years, I thought that window would stay open until I closed it. Doesn't it?
Anyway, if I can ping it, why isn't it showing in the Router and what's with this half A partial connection??
Joined: 22 Aug 2009 Posts: 260 Location: New York State
Posted: Wed Sep 20, 2023 16:35 Post subject:
Then why does everything else show when the device is active and why did it use to show on the other units? Sorry, that doesn't make a lot of sense. Of course, that doesn't explain the communication issues. I've never had anything that is active that didn't show under active clients.
