91369 Service Manual 2-15
Setup
Note:
• A DHCP lease is a TCP/IP configuration given out from the DHCP server that is valid for a period
defined by the DHCP server or forever (no expiration).
• Monitors configured for DHCP operation request a lease from the DHCP server when they boot up or
when their existing lease expires during operation. If the DHCP server is not present, the monitor
checks the expiration time of the last DHCP lease obtained. If the lease is still valid, the monitor
continues to use those values and operates normally. If the lease has expired, the monitor disables
TCP/IP networking and displays a NETWORK SIGNAL LOST message to indicate that it is unable to
communicate over the network. The monitor continues to request a DHCP lease until it receives one.
• If the monitor’s configured DECNET node ID is a duplicate on the network, the DHCP server can be
confused. This may result in a duplicate or invalid DHCP lease and may prevent full network
communication.
• The subnet mask must correctly correspond to the network size and type during operation. Monitors
may not be able to fully communicate with each other if the DHCP server fails to set the network mask
properly.
The DNS server address is in standard TCP/IP address form, while the DNS default domain is a string of
ASCII characters. A DHCP server may also provide this information.
Editing this tab is performed as described in Editing Tab Fields on page 2-13. Tabbing order is IP Address >>
Subnet Mask >> Gateway Address >> DHCP >> DNS Server Address >> DNS Default Domain >> IP
Address. Changes made to this tab’s settings take effect after a successful save and monitor reset.
Secondary Display — The Secondary Display field is only available if option -D, Perioperative, has been
activated.
Select ENABLE on the TCP/IP tab to activate the primary monitor’s secondary display. When you enable the
secondary display, the IP Address and Secondary Hostname fields become available and must contain a
valid entry for the secondary monitor to operate. The IP Address and Secondary Hostname fields are
exclusive to each other.
Enter a valid IP Address when your network is using static IP addresses.
-OR-
Enter a valid Secondary DNS hostname when your network is using DHCP for network configuration.
Changes made to the Secondary Display settings take effect after the changes have been saved.
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