route newbie question

Sorry this is such a newbie question but here goes.

I am told by my net admin that I need to use the following info to
setup a persistent route on my RHES3 box.

I tried
route add -net 20.20.3.0/24 gw 10.10.4.1 eth2
I get error "SIOCADDRT: network unreachable"

My box 12.2.2.44 with netmask of 255.255.255.0 on eth2

One of the IP's I need to talk to: 20.20.3.44

Subnet IP and other sit: 20.20.3.0/24

Router Address I was told to use: 10.10.4.1

My guess is that route is complaining since the gateway is not in the
subnet I am trying to reach. But I am told that this is the correct
address to use.
I have read a couple posts that say I maybe should look at using the
ip command to get this working?

Hello,

mackdaddy315 a écrit :
> Sorry this is such a newbie question but here goes.
>
> I am told by my net admin that I need to use the following info to
> setup a persistent route on my RHES3 box.
>
> I tried
> route add -net 20.20.3.0/24 gw 10.10.4.1 eth2

The route command only creates volatile routes that will be lost at the
next boot. In order to create a persistent route across reboots, you
need to edit some config file in /etc/sysconfig/network IIRC (I'm not
too familiar with RedHat).

> I get error "SIOCADDRT: network unreachable"
>
> My box 12.2.2.44 with netmask of 255.255.255.0 on eth2
>
> One of the IP's I need to talk to: 20.20.3.44
>
> Subnet IP and other sit: 20.20.3.0/24
>
> Router Address I was told to use: 10.10.4.1
>
> My guess is that route is complaining since the gateway is not in the
> subnet I am trying to reach.

No, the error occurs because the gateway is not in *your* subnet. Or you
specified the wrong interface, if your box is connected to multiple
networks. What does 'route -n' say ?

> I have read a couple posts that say I maybe should look at using the
> ip command to get this working?

It will have the same result.

On Aug 20, 5:32 pm, mackdaddy315 <mackdaddy...@hotmail.com> wrote:

> My box 12.2.2.44 with netmask of 255.255.255.0 on eth2
>
> One of the IP's I need to talk to: 20.20.3.44
>
> Subnet IP and other sit: 20.20.3.0/24
>
> Router Address I was told to use: 10.10.4.1
>
> My guess is that route is complaining since the gateway is not in the
> subnet I am trying to reach. But I am told that this is the correct
> address to use.
> I have read a couple posts that say I maybe should look at using the
> ip command to get this working?

Think about it this way. You're trying to get a letter to Poland. To
do that, the letter needs to go in the mailbox. Telling your mom where
the nearest mailbox is would help her send the letter. Telling her
which post office in Poland delivers to the final street address does
not help her one bit.

That there is a router somewhere with the address 10.10.4.1 that knows
how to reach 20.20.3.0/24 is of no use to your computer. Your
computers needs to know what *IT* should do with packets bound for
20.20.3.0/24, and you haven't told it. Since it can't send packets
directly to 10.10.4.1, telling it that 10.10.4.1 can send packets to
20.20.3.0/24 is of no help.

DS

mackdaddy315 <(E-Mail Removed)> wrote:

> Router Address I was told to use: 10.10.4.1

Can you actually ping that router?

ping 10.10.4.1

Regards,

Mark.

--
Mark Hobley
393 Quinton Road West
QUINTON
Birmingham
B32 1QE

Email: markhobley at hotpop dot donottypethisbit com

http://markhobley.yi.org/