netmasks(4)                                              netmasks(4)


       NAME
             netmasks - network mask data base

       SYNOPSIS
             /etc/netmasks

       DESCRIPTION
             The netmasks file contains network masks used to implement IP
             standard subnetting.

          Files
             /var/yp/domainname/netmasks.byaddr      Corresponding NIS map
                                                     containing network
                                                     masks to be used with
                                                     IP subnetting.  The
                                                     mask is the key in the
                                                     map.

       USAGE
             For each network that is subnetted, a single line should exist
             in this file with the network number, any number of SPACE or
             TAB characters, and the network mask to use on that network.
             Network numbers and masks may be specified in the conventional
             IP `.'  notation (like IP host addresses, but with zeroes for
             the host part).

             When the Network Information Service (NIS) is in use, it
             references the NIS map netmasks.byaddr on the NIS server
             instead of /etc/netmasks.

          Examples
                   128.32.0.0 255.255.255.0

             can be used to specify that the Class B network 128.32.0.0
             should have eight bits of subnet field and eight bits of host
             field, in addition to the standard sixteen bits in the network
             field.

       REFERENCES
             ifconfig(1M)








                           Copyright 1994 Novell, Inc.               Page 1