[LUNI] Route add

[Lawrence, Sean]

I tried adding it to static-routes before I posted this but that didn't
help.

I really don't see wh it needs to be added to a startup script.  I was able
to change it back to the old IP and it generated a correct netmask.  I've
had to change the external IP on this box once before which also involved a
different gateway as well and had no problems.  Now that we had to move it
to an external IP that had to route out it totally flaked.  I can't
understand why it was pulling 255.255.255.255 rather than 0.0.0.0 as it
should have.

Let me be explicit.  When we changed the IP to the new internal one the
external one was going to translate to the new routing table on the box read
like this:

Kernel IP routing table
Destination     Gateway         Genmask                Flags Metric Ref
Use Iface
x.x.x.x         *               255.255.255.0          U     0      0
0 eth0
127.0.0.0       *               255.0.0.0              U     0      0
0 lo
default         x.x.x.x         255.255.255.255        UG    0      0
0 eth0

We then hosed the default route and did:

route add -net 0.0.0.0 gw x.x.x.x netmask 0.0.0.0

This took and read somethinglike:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
x.x.x.x         *               255.255.255.0   U     0      0        0 eth0
127.0.0.0       *               255.0.0.0       U     0      0        0 lo
default         x.x.x.x         0.0.0.0         UG    0      0        0 eth0

when we restart the nework it looked like this:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
x.x.x.x         *               255.255.255.0   U     0      0        0 eth0
127.0.0.0       *               255.0.0.0       U     0      0        0 lo

It didn't hold the default even after we added it which did make a whole lot
of sense to me.  Once we changed the IP back everything was fine.

Hope that makes my problem a little more understandable.

Thanks,

Sean

-----Original Message-----
From: Simon L. Epsteyn [mailto:seva at sevatech.com]
Sent: Thursday, November 01, 2001 2:11 PM
To: Linux User Group (E-mail)
Subject: Re: [LUNI] Route add


This needs to be added to one of the init scripts, for example on newer Red 
Hat Linux it would go into /etc/sysconfig/network or 
/etc/sysconfig/network-scripts/ifcfg-eth0 on older ones.

/Simon

On Thu, 1 Nov 2001, Lawrence, Sean wrote:

> I'm having a huge problem, we moved our server behind the DMZ we changed
the
> IP, the default route was bogus and we hosed it but when we do a route add
> -net 0.0.0.0 gw x.x.x.x netmask 0.0.0.0 it adds the routes but doesn't
hold
> it when we start the network service.
> 
> I need some serious help here.
> 
> Thanks,
> 
> Sean
> ______________________________________________________________________
> Linux Users Of Northern Illinois - Technical Discussion 
> luni at luni.org
> http://luni.org/mailman/listinfo/luni
> 

-- 
seva at sevatech.com
http://sevatech.com

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