Devices Locking Out on Network
On Friday night we experienced a problem with a lot of external network cameras on our LAN went offline.
Came into work yesterday and discovered printers would not function from our printer server.
We also discovered other TCP/IP devices on network will not function.
You can ping them and get response but software will not connect to these devices.
Re-booted main server switch in server room then mail server stopped being contactable.
It could not ping anyone or receive pings from anyone else. Put mailservers lan card onto dhcp adressing and it got an ip address but still cannot ping or be pinged.
Ended up adding new LAN card to mail server and assigned that a static IP and can now be pinged and send pings. Mail in flowing internally.
But we still appear to have issues around our site with TCP/IP. Some devices work and others dont.
An example would be that if a network printer has a LAN connection & direct connetion to local pc. Local pc cannot printer direct to printer until lan cable is removed.
We have tryed all sorts of things, disconnectiing fibre links, turning switches off etc, but still parts of network apper to be broken.
Can anyone offer any other suggestions??
Please help we are scratching already bald heads and losing more hair trying to resolve this one.
It's as if there is a faulty device on the LAN but don't know how to find it!