Sorry, I'm not following.
The 7855 copier should have the address 100.100.100.101.
The Fiery is an entirely seperate thing and it should be at 10.5.1.8 according to what I believe you are trying to say.
If the machines are all hooked up right in the first place you will not ever be able to ping anything at 100.100.100.101 because:
1. It isn't on your network, it is straight between Fiery and printer, no switch/hub/router at all.
2. It is in an entirely different subnet that should not be reachable from anything running on 10.1.x.x
So I can assume you are getting a duplicate IP from the 10.5.1.8 address. So, when you get the error, unplug the network cable from the Fiery and verify that you can still ping it, if you can the error is correct, and you need to find what other device is using the same IP and change it, or you can change the Fiery to something not already used and then change all your print drivers on all your devices to connect to the new IP..
The printer is set the IP network 10.5.1.8 as I let the technician at the time.
And automatically when plugged with fiery 10 minutes put the IP 100.100.100.101 and we paracere a mac there is a duplicate IP (100.100.100.101) and then we were without internet and can not print ONLY on Mac
That IP range do not have the Mac ..
The computers run Windows smoothly.
The copier should be set to DHCP and connected to the Fiery via Crossover cable from the back of the copier to the back of the printer (NIC has a picture of the copier by it).
The copier will pull that 100.100.100.101 IP from the Fiery, this is how the 2 devices communicate with each other.
Now the Fiery needs to be on your network (consider the crossover cable as Xerox's network)
Easiest way is to just set it to DHCP, then scan the network with Command Workstation to find it, and connect. (Login will be admin/Fiery.1) then Select Server/Configure. go to in the left tree menu Connectivity/Protocols and fill in Ethernet and DNS sections. Typically it will force you to setup WINS/DNS/Ethernet in that order.
I am somewhat certain the copier is set to use the Fiery IP address in your case.
We have a 7855 with external fiery in a network with 20 computers on the same network windowws to 5 mac osx.
The fiery and has a fixed IP for a month to start the machine after 20 minutes on a Mac appears that there is a duplicate IP that is accessing with mac 100.100.100.101 and lose access to internet and can not print ONLY Macs
A which may be due?
Every Mac has a fixed IP and not conincide none with the Xerox or the fiery.
It may be for some of the Bonjour protocol??
I appreciate your help.:smileysurprised: