IP Camera ethernet woes...

BennyC · 10 Nov 2021 at 19:22

Evening All,

Recently I had some DNS related issues with my Synology Disk station which are now resolved.

However I now seem to have an issue whenever I disconnect my Macbook from LAN, in that both IP Camera's, connected to the same network switch, disconnect too.

I can see them as connected devices in my router control panel up until this point. I then can't connect to them via IP. As soon as I reconnect my Mac they're accessible again and reappear in my router CP.

What I find odd is that the lights are all still illuminated and flashing on the switch but my camera's seem to need my Mac connected to function.

I haven't touched their static IP's or any port forwarding. I've tried two different PoE ports and also moved my Mac, Windows PC and NAS connections to different ports on the switch for good measure.

I should add that after some faffing yesterday evening they seemed to behave for the duration of the night and say connected, up until this evening.

Any suggestions would be welcome.

Thanks,

BennyC

Edit: IPv4 Gateway on both camera control panels (Hikvision) seemed to have changed itself from my routers address... might have worked but time will tell!

Edit2: Nope / maybe.

WJA96 · 11 Nov 2021 at 16:01

Are you running the cameras in Synology Surveillance Station? If so, then you should make any adjustments there rather than directly to the cameras.

visibleman · 12 Nov 2021 at 12:34

Didn't you have an issue with your Synology and Mac previously?
https://forums.overclockers.co.uk/threads/synology-disk-station-connect-lost-since.18940334/

Sounds like it's a similar issue with DHCP.

BennyC · 12 Nov 2021 at 20:15

WJA96 said:
Are you running the cameras in Synology Surveillance Station? If so, then you should make any adjustments there rather than directly to the cameras.

Noted, thanks.

visibleman said:
Didn't you have an issue with your Synology and Mac previously?
https://forums.overclockers.co.uk/threads/synology-disk-station-connect-lost-since.18940334/

Sounds like it's a similar issue with DHCP.

Yep, I said this in the OP.

I'm not quite sure how but it seems to have resolved itself. I rebooted the switch, connected the NAS temporarily directly to my router and move the connections around on the switch itself. Could well have adjusted something else but honestly can't remember....

Thanks though.

Donnie Fisher · 13 Nov 2021 at 23:19

A look on google suggests that clearing the DNS cache on MacOS can help with some problems on networks too. On a modern mac, the command should be :

Code:

sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

it'll ask for your password to run.