1104-02: System Subnet Mask
Use this option to set the DSX system’s subnet mask. The subnet mask distinguishes IP addresses of computers
on your LAN from those outside your network (e.g., on the internet or a private WAN). Like the IP address, the
subnet mask also consists of four 3-digit octets. The subnet mask uses the entry 255 to define the masked octets
and 0 to define the unmasked octets.
A typical entry of 255.255.255.0 means if two IP addresses have the same first three octets, they are on the
same network. For example, if:
- The IP addresses of the LAN begin with 192.168.1, and
- The subnet mask 255.255.255.0, then
- The network routers know that 192.168.1.250 and 192.168.1.1 are on the same network.
Requests to these addresses are kept within the LAN (as opposed to being routed to the internet). When the
first three octets don’t match, the requests are routed out of the LAN.
Features Related to this Program
- Digits using 0-9, 12 max in the format xxx.xxx.xxx.xxx.
- With DHCP disabled in 1103-01: DHCP Enabled, the default is 0.0.0.0 (unassigned).