Datasheet

“main” (Installation and Administration) — 2004/6/25 — 13:29 — page 454 — #480
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21.5 Routing in SUSE LINUX
The routing table is set up in SUSE LINUX via the configuration files
/etc/sysconfig/network/routes and /etc/sysconfig/network/
ifroute-*. All the static routes required by the various system tasks can
be entered in the /etc/sysconfig/network/routes file: routes to a
host, routes to a host via a gateway, and routes to a network. For each inter-
face that needs individual routing, define an additional configuration file:
/etc/sysconfig/network/ifroute-*. Replace * with the name of
the interface. The entries in the routing configuration files look like this:
DESTINATION GATEWAY NETMASK INTERFACE [ TYPE ] [ OPTIONS ]
DESTINATION GATEWAY PREFIXLEN INTERFACE [ TYPE ] [ OPTIONS ]
DESTINATION/PREFIXLEN GATEWAY - INTERFACE [ TYPE ] [ OPTIONS ]
To omit GATEWAY, NETMASK, PREFIXLEN, or INTERFACE, write - in-
stead. The entries TYPE and OPTIONS may just be omitted.
The route’s destination is in the first column. This column may contain the
IP address of a network or host or, in the case of reachable name servers, the
fully qualified network or host name.
The second column contains the default gateway or a gateway through
which a host or a network can be accessed. The third column con-
tains the netmask for networks or hosts behind a gateway. The mask is
255.255.255.255, for example, for a host behind a gateway.
The last column is only relevant for networks connected to the local host
such as loopback, ethernet, ISDN, PPP, and dummy device. The device
name must be entered here.
The following scripts in the directory /etc/sysconfig/network/
scripts/ assist with the handling of routes:
ifup-route for setting up a route
ifdown-route for disabling a route
ifstatus-route for checking the status of the routes
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21.5. Routing in SUSE LINUX