Platform LSF Reference Version 6.2

Platform LSF Reference
304
IP Address
Written using the conventional dotted decimal notation (nnn.nnn.nnn.nnn) and
interpreted using the
inet_addr routine from the Internet address manipulation
library,
inet(3N).
Official Host Name
The official host name. Single character names are not allowed.
Specify
-GATEWAY or -GW as part of the host name if the host serves as a GATEWAY.
Specify
-TAC as the last part of the host name if the host is a TAC and is a DoD host.
Specify the host name in the format defined in Internet RFC 952, which states:
A “name” (Net, Host, Gateway, or Domain name) is a text string up to 24 characters
drawn from the alphabet (A-Z), digits (0-9), minus sign (-), and period (.). Periods
are only allowed when they serve to delimit components of “domain style names”.
(See RFC 921, “Domain Name System Implementation Schedule”, for
background). No blank or space characters are permitted as part of a name. No
distinction is made between upper and lower case. The first character must be an
alpha character. The last character must not be a minus sign or a period.
RFC 952 has been modified by RFC 1123 to relax the restriction on the first character
being a digit.
For maximum interoperability with the Internet, you should use host names no longer
than 24 characters for the host portion (exclusive of the domain component).
Aliases
Optional. Aliases to the host name.
The default host file syntax
ip_address official_name [alias [alias ...]]
is powerful and flexible, but it is difficult to configure in systems where a single host
name has many aliases, and in multihomed host environments.
In these cases, the
hosts file can become very large and unmanageable, and
configuration is prone to error.
The syntax of the LSF
hosts file supports host name ranges as aliases for an IP address.
This simplifies the host name alias specification.
To use host name ranges as aliases, the host names must consist of a fixed node group
name prefix and node indices, specified in a form like:
host_name[index_x-index_y, index_m, index_a-index_b]
For example:
atlasD0[0-3,4,5-6, ...]
is equivalent to:
atlasD0[0-6, ...]
The node list does not need to be a continuous range (some nodes can be configured
out). Node indices can be numbers or letters (both upper case and lower case).