User's Manual Part 1

41
Subnet Mask A subnet allows the flow of network traffic between hosts to be segregated based
on a network configuration. By organizing hosts into logical groups, subnetting can improve
network security and performance.
Gateway IP Address The IP address of a computer / router on the current network that acts as
a gateway. A gateway acts as an entrance / exit to packets from / to other networks.
Ethernet Configuration This enables the Ethernet configuration to be forced rather than auto
negotiated. The configuration should only be forced if you are having problems with auto
negotiation. You must ensure that you configure both this unit and the Ethernet port to which it
is connected identically. If you force a fixed Ethernet Configuration on the OS-Gemini unit then
you MUST also force the same fixed configuration on the equipment to which it is connected. If
you fail to force the configuration of the connected equipment, its automatic configuration
mechanisms will normally cause a duplex mismatch, and you will receive greatly reduced
throughput!
Ethernet Auto Mdix This enables/disables the Auto Medium Dependent Interface
(MDI)/Medium Dependent Interface Crossover (MDIX) capability.
All the above attributes are non-volatile, once set they will be used by the unit even after a
power on reset. A number of attributes, such as IP Address, Subnet Mask and Gateway IP
Address will require a reset before they are used. If any of these attributes are changed a reset
screen appears asking the user to verify the reset. (see Figure 14)
Figure 14 Configuration Reset Page
Note: At this point you will lose connection to the unit. If you have just changed the IP Address
you now have to reconnect to the unit using the address just set.