Remove the unspecified gateway from linux routing table

[Eugène Ngontang]

Hi all,

I've a remote linux machine whose the routing table is :

    [root at hostname]# route -n
    Kernel IP routing table
    Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
    0.0.0.0         0.0.0.0         0.0.0.0         U     0      0        0
eth0
    10.10.10.16    0.0.0.0         255.255.255.240 U     0      0        0
eth0
    169.254.0.0     0.0.0.0         255.255.0.0     U     1002   0        0
eth0

The default gateway I should use is  10.10.10.17, and should be given by a
linux dhcp server. So to be able to connect to the system I call someone on
the site ask him to add the route manually (**route add default gw
10.10.10.17**).
When the route has been added I can now connect to the system. And once
connected when I check the routing table again I have this :

    [root at hostname]# route -n
    Kernel IP routing table
    Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
    0.0.0.0         10.10.10.17    0.0.0.0         UG    0      0        0
eth0 (UG flag means it's up and is the gateway)
    0.0.0.0         0.0.0.0         0.0.0.0         U     0      0        0
eth0
    10.10.10.16    0.0.0.0         255.255.255.240 U     0      0        0
eth0
    169.254.0.0     0.0.0.0         255.255.0.0     U     1002   0        0
eth0

And when I restart the system, it boots without the right default gateway,
and I'm obliged to call again to set the route manually. The dhclient lease
file has the good **"option routers"** taken from the dhcp server.

Now I'm trying to remove the unspecified route from the routing table but
each time I try I'm disconnected from the machine.

I've tried these different ways  :

    route del -net 0.0.0.0 netmask 0.0.0.0 metric 0

    route del default gw 0.0.0.0

    route del -net 0.0.0.0 gw 0.0.0.0

The three attempts disconected me from the server, and the guy at the other
side tells me that each time I try to remove the route the default route
becomes a star (**default ***). I'm obliged to let him add the route again
mannualy, and when I'm connected, and I restart the network I lose the
connection again.

So my questions are :
1) Why does this unspecified default route come back every time?
2) How can I (what's the way to) remove it without spoiling the routing
table (losing the good  default gateway).

Thanks.

Regards,
Eugène NG



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