HP-UX Reference (11i v2 07/12) - 1 User Commands N-Z (vol 2)

p
pathalias(1) pathalias(1)
Some examples:
down princeton!(DEDICATED), tilt,
%thrash(LOCAL)
princeton topaz!(DEMAND+LOW)
topaz @rutgers(LOCAL+1)
If a link is encountered more than once, the least-cost occurrence dictates the cost and network character.
Links are treated as bidirectional but asymmetric: for each link declared in the input, a
DEAD reverse link
is assumed.
If the "to" host in a link is surrounded by angle brackets, the link is considered terminal, and further links
beyond this one are heavily penalized. For example, with input
seismo <research>(10), research(100), ihnp4(10)
research allegra(10)
ihnp4 allegra(50)
the path from seismo to research is direct, but the path from
seismo to allegra uses ihnp4
as a relay; not research.
The set of names by which a host is known by its neighbors is called its aliases. Aliases are declared as fol-
lows:
name
=alias, alias ...
The name used in the route to or through aliased hosts is the name by which the host is known to its prede-
cessor in the route.
Fully connected networks, such as the ARPANET or a local-area network, are declared as follows:
net={host, host, ...}
The host-list can be preceded or followed by a routing character (! by default), and can be followed by a
cost (4000 by default). The network name is optional; if not given, pathalias creates one.
etherhosts = {rahway, milan, joliet}!(LOCAL)
ringhosts = @{gimli, alida, almo}(DEDICATED)
= {etherhosts, ringhosts}(0)
The routing character used in a route to a network member is the one encountered when "entering" the net-
work. See also the sections on gateways and domains.
Connection data can be given while hiding host names by declaring
private {host, host, ...}
pathalias
does not generate routes for private hosts, but can produce routes through them. The scope
of a private declaration extends from the declaration to the end of the input file in which it appears, or to a
private declaration with an empty host list, whichever comes first. The latter scope rule offers a way to
retain the semantics of private declarations when reading from the standard input.
Dead hosts, links, or networks can be presented in the input stream by declaring
dead {arg, ...}
where arg has the same form as the argument to the -d option.
To force a specific cost for a link, delete all prior declarations with
delete {host1!host2}
and declare the link as desired. To delete a host and all its links, use
delete {host}
Error diagnostics refer to the file in which the error was found. To alter the file name, use
file {filename}
Fine tuning is possible by adjusting the weights of all links from a given host, as in
adjust {host1, host-2(LOW), host3(-1)}
If no cost is given, a default of 4000 is used.
HP-UX 11i Version 2: December 2007 Update − 2 − Hewlett-Packard Company 139