Instruction manual

11
10 GB Communication
Version
1.0
3
& Control Card Instruction Manual
4.2.2 Network Mask and Default Gateway
The network address space is usually organized into several subnets.
Routers (default gateways) constitute borders between subnets. In IPv4, the
subnet is identified by its base address and network mask.
The network mask can be programmed using the SETIPV4NETMASK
instruction. The factory default value is 255.255.255.0. If the IP Mode is set
to DHCP the controller automatically gets the network mask from the DHCP
server.
A default gateway is a node (a router) on a network that serves as an
access point to another network. The Default gateway can be programmed
using the SETIPV4GATEWAY instruction. The device supports three gateway
modes:
 None: There is no default gateway in the network.
 Static: The user sets the IP of the gateway. The gateway MAC address
will be found by the device using ARP sequence.
 DHCP: The controller finds the default gateway with DHCP protocol.
References:
 RFC 950 Internet Standard Subnetting Procedure
 RFC 1812 New Internet Subnetting Procedure
 RFC 950 Utility of Subnets of Internet Networks
 RFC 1101 DNS Encodings of Network Names and Other Types