gateways - File which lists gateways for routed
/etc/gateways is used by routed(8); the file contains a list of gateways
which may not be located by using only information from the
SIOGIFCONF ioctl(2) when routed(8) is started.
Gateways specified in /etc/gateways should be marked passive if they
are not expected to exchange routing information, while gateways marked
active should be willing to exchange routing information (i.e. they
should have a routed(8) process running on the machine). Routes
through passive gateways are installed in the kernel's routing tables
once upon startup. Such routes are not included in any routing information
transmitted. Active gateways are treated equally to network
interfaces. Routing information is distributed to the gateway and if
no routing information is received for a period of time, the associated
route is deleted. Gateways marked external are also passive, but are
not placed in the kernel routing table nor are they included in routing
updates. The function of external entries is to inform routed(8) that
another routing process will install such a route, and that alternate
routes to that destination should not be installed. Such entries are
only required when both routers may learn of routes to the same destination.
/etc/gateways is comprised of a series of lines, each in the following
[ net | host ] name1 gateway name2 metric value [ passive | active |
The net or host keyword indicates if the route is to a network or specific
Name1 is the name of the destination network or host. This may be a
symbolic name located in /etc/networks or /etc/hosts (or, if started
after named(8), known to the name server), or an Internet address specified
in ``dot'' notation; see inet(3).
Name2 is the name or address of the gateway to which messages should be
Value is a metric indicating the hop count to the destination host or
One of the keywords passive, active or external indicates if the gateway
should be treated as passive or active (as described above), or
whether the gateway is external to the scope of the routed(8) protocol.
Internetwork routers that are directly attached to the Arpanet or Milnet
should use the Exterior Gateway Protocol EGP to gather routing
information rather then using a static routing table of passive gateways.
EGP is required in order to provide routes for local networks to
the rest of the Internet system.
Internet Transport Protocols, XSIS 028112, Xerox System Integration
The routed(8) command appeared in 4.2BSD.
This manpage was extracted from routed(8) by Steve Kostecke,
<firstname.lastname@example.org>, for the Debian GNU/Linux system.
Debian 5 July 1999 GATEWAYS(5)
[ Back ]