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

[Jim Jackson]

On Wed, 22 Apr 2009, Gary Stainburn wrote:

> 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.

The dhcp server is supplying a new default route, and the dhcp client is 
implementing it. Either re-configure the dhcp server to supply no default 
route, or use static.

>
> 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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