Linux automatic route after bringing up interface

From: Peteris Krumins (pkruminsREMOVETHIS_at_inbox.lv)
Date: 07/31/03 

Date: 30 Jul 2003 22:08:59 GMT

Hello,

 I have forgotten how to avoid linux (>2.4.x) setting up a route as soon
as
 i configure an interface.
 If i use netmask 255.255.255.255 no route is added but i am unable to
add
 a default gw (since it is not on the same subnet as the interface?).

 for example:
 `ifconfig eth0 10.0.0.55 netmask 255.255.255.0 broadcast 10.0.0.255 up`
  would add me a route for 10.0.0.0/24 on eth0, but this is no good if i
 have to route it out via 10.0.0.1 (for example if there is some machine
 inbetween).

 The only workaround i have found is:
 ifconfig eth0 ...
 route del -net 10.0.0.0 netmask 255.255.255.0 dev eth0
 route add -net 10.0.0.0 netmask 255.255.255.0 gw 10.0.0.1 dev eth0

 if i try `ifconfig eth0 ... netmask 255.255.255.255 ... up` and then
 no route is added (since it is a single host?) but if as soon as i try
 `route add -net 10.0.0.0 netmask 255.255.255.0 gw 10.0.0.1 dev eth0`
 i get an error that the network is unreachable. 

--
Eue

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