ETC Cobalt Family v7.1.0 - Manual (Page 161)

Cobalt 7.1 - 20140612
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Address Service (DHCP)
Net3 Services uses a DHCP (Dynamic Host Configuration Protocol) address server. DHCP is a
TCP/IP protocol that dynamically assigns an IP address to a network device when it requests one. This
is a small and simple DHCP server that is intended to be used on non-routed networks. It will not
serve IP addresses across a router.
CAUTION: There should only be a single DHCP server active on a network. It is possible to start
more than one DHCP server on a single network (nothing is built-in to DHCP servers to prevent this
from happening). If this occurs, it will result in unstable conditions and possibly result in network
communications failures.
Clicking in the enable box will start the DHCP server in the Cobalt console. It will use the settings
below to determine which IP addresses it gives out.
• Fist Address - This sets the starting IP address for the range of IP addresses that the DHCP
server will hand out.
• Number of Addresses - This sets how many IP addresses the DHCP server will give out. A
setting of 500 means it will give out IP addresses to the first 500 devices that ask for an IP
address.
• Subnet Mask - This sets the logical network size vs. the device address. ETC’s default is
255.255.000.000 (class B). This is the subnet mask that the DHCP server will give to
network devices.
• Enable Routed Network - This specifies the IP address of a router if one is present on your
network. This is the gateway IP address that the DHCP server will send to network devices to
use. If you are on a flat or non-routed network, the Gateway IP address should match the IP
address of the device. In order to configure this DHCP server to send out matching gateway
IP addresses, configure this gateway IP address to
match the First Address field. Then the DHCP server will give out a gateway IP address that
matches the IP address.
• Learn Network Devices...
Makes a refresh of all ACN network devices.
Update Service (TFTP)
Clicking in the enable box will start the TFTP (Trivial File Transfer Protocol) server.
• Update File Directory - This sets the directory where files are to be served through TFTP.
This must be
the full path to the directory, including drive letter. For example: C:\etc\nodesbin
Time Service (SNTP)
Clicking in the enable box will start the SNTP (Simple Network Time Protocol) service. You
determine if the service is running as a client (receiving time messages) or as a server (sending time
messages) during the installation process.