IP Address change

[SOG1943a]

I have just moved my works Internet services to BT and have got Infinity

We are a small printing company with 3 PC'c Networked to a Plate Maker, Printing machine and a Copier. As soon as I connected the Hub to one of the Networked PC's and loaded the software, everything went smoothly until I tried to send a job to the Printing Machine, which I was advised was not available, it would appear that just by loading the Hub etc my Printing Machine IP Addresses have been overridden by BT. By running system restore on my PC my Printer became available again but of course I have now lost the Hub connection

Any idea as to what I can do, although I understand the basics of Computing I am not a so called expert

Regards  SOG1943a

[SOG1943a]

We are a small printing company with 3 PC'c Networked to a Plate Maker, Printing machine and a Copier. As soon as I connected the Hub to one of the Networked PC's and loaded the software, everything went smoothly until I tried to send a job to the Printing Machine, which I was advised was not available, it would appear that just by loading the Hub etc my Printing Machine IP Addresses have been overridden by BT. By running system restore on my PC my Printer became available again but of course I have now lost the Hub connection

Any idea as to what I can do, although I understand the basics of Computing I am not a so called expert

Regards  SOG1943a

[TimDurham75]

By default your router is a DHCP server and will be responsible for allocation of addresses to connected machines - so they will change to match the configured details.  You should only have one DHCP server present within a network.  You need to configure the hub to meet your requirement - either turning off the DHCP and ensuring that appropriate static addresses and address ranges are used so you can get a gateway connection or to turn off any other DHCP and reconfigure other infrastructure to match or use the router.  You will need to ensure that IP address range and subnet mask details are correct/consistent across infrastructure to ensure connectivity of devices.  You also need to ensure appropriate DNS details - that whether the router or some other internal DNS or locally resolved HOSTS/LMHOSTS record the details of any infrastructure elements that require to be resolved - if the hub does not have the details of some machine then any other client attempting to locate that machine  would be getting "unknown host" type responses if the hub is not registering the address.

Regards

Tim

[kuerten]

There might be an IP conflict here. I would make sure all of them are set to DHCP. 

[orthohin]

I think problem in your DHCP router, your printer IP address changing randomly and you are unable to print any things. Please make sure that you have fixed the printer IP address.

______________

Orthohin

[RichCreedy]

network printers, are sometimes set with a static local ip address, it may be that your old router was using a different range.

ideally you need to change the printers ip address to match the new range, if the printer has a menu screen, with which you can change settings, then change the ip address to something the router is not using but on the same range.

so if on the router dhcp is set to assign addresses from 192.168.1.2 to 100, make sure the printer is set to something like 192.168.1.101

[TimDurham75]

Alternatively the address can still be allocated by DHCP but you can set specific hosts to get allocated a static address from the pool.   Achieves the same result but would also ensure that router dns would correctly resolve the host.  If you externalise the static this will still work but you may need to create a manual dns entry to ensure that other clients always resolve it, unless you ensure all clients have an appropriate hosts entry for it.