[Wylug-help] system-config-network, DHCP and routes

Gary Stainburn gary.stainburn at ringways.co.uk
Wed Apr 22 13:41:26 UTC 2009


Hi folks.

My network has an FC9 box working as a gateway, with the network being 
configured using system-config-network.

As well as the LAN (eth0) I've got 2xADSL connections, 

one for normal internet traffic 
	eth1
	static IP 192.168.1.1 
	default gw 192.168.1.254

one for a VPN
	eth2
	DHCP 91.85.127.194
	DHCP allocated gateway 212.104.130.193

The problem is that when eth2 comes up, it overrides the 192.168.1.254 route 
and all traffic goes down that link.

If I remove the DHCP and try adding the details statically, everything works 
except the final route to the remote end of the VPN.

Below is the route table when used in DHCP mode, including changing the 
default route.

[root at groucho ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
212.104.130.193 0.0.0.0         255.255.255.255 UH    0      0        0 eth2
77.86.27.0      212.104.130.193 255.255.255.192 UG    0      0        0 eth2
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
10.6.0.0        0.0.0.0         255.255.0.0     U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth2
91.0.0.0        0.0.0.0         255.0.0.0       U     0      0        0 eth2
0.0.0.0         212.104.130.193 0.0.0.0         UG    0      0        0 eth2
[root at groucho ~]# route del default
[root at groucho ~]# route add default gw 192.168.1.254
[root at groucho ~]#


However, when I try to do this with static details the route to 77.86.27.0 
does not get set up, and if I try to set it up manually using:

route add -net 77.86.27.0/26 gw 212.104.130.193

It says that the process does not exist.  Can anyone tell me what I'm doing 
wrong.

Pinging 212.104.130.193 does work.
-- 
Gary Stainburn
 
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