NFS Services Administrator's Guide (B.11.31.03) August 2008

specified, it is likely to be selected. Servers that have no weight factor specified
have a default weight of zero and are most likely to be selected.
man -ro broccoli(1),cabbage(2),cauliflower(3):/usr/share/man
However, server proximity is more important than the weighting factor you assign.
A server on the same network segment as the client is more likely to be selected,
than a server on another network segment, regardless of the weight you assign.
The weighting factor is taken into account only when deciding between servers
with the same network proximity.
• If the remote directory has a different name on different servers, use a syntax such
as the following from a direct map:
/nfs/proj2/schedule -ro \
broccoli:/export/proj2/schedule, \
cauliflower:/proj2/FY07/schedule
To configure multiple replicated servers for a directory, follow these steps:
1. Create and configure the /etc/netmasks file. AutoFS requires the
/etc/netmasks file to determine the subnets of local clients in a replicated
multiple server environment.
The /etc/netmasks file contains IP address masks with IP network numbers.
It supports both standard subnetting as specified in RFC-950, and variable-length
subnetting as specified in RFC-1519. For standard subnetting, the file must contain
a single line for each network. This provides the network number and the network
mask to be used on that network. Specify the network number and the mask using
the conventional IP dot (.) notation. The network number must be either a class
A, B, or C network number. For example:
network number netmask
128.32.0.0 255.255.255.0
For variable length subnetting, the /etc/netmasks file must contain a line for
each subnet, where the first field refers to the subnet and the second field refers
to the netmask. The format for specifying these fields is the same as that of standard
subnetting.
Example of using the /etc/netmasks File
The following example shows how AutoFS uses the /etc/netmasks file to determine
the local client subnets in a multiple-server environment. In this example, servers basil
and thyme export/nfs/mount. The IP address for server basil is 15.43.232.30, and
the IP address for the server, thyme is 15.244.10.20:
# /etc/auto_direct file
/nfs_mount basil,thyme:/nfs/mount
#/etc/netmasks file on the client sage:
#network number netmask
98 Configuring and Administering AutoFS