multiple network interfaces questions, RHEL 3 new install
Chuck Campbell
campbell at accelinc.com
Sat Jan 22 02:00:41 UTC 2005
After googling all afternoon, I begin to understand my earlier misconceptions
:-)
On Fri, Jan 21, 2005 at 05:18:22PM -0600, Bob McClure Jr wrote:
<snip>
>
> > Where can I find info on setting things up this way (or is it impossible) ?
> > I know that I can bind samba to a particular interface, but how do I control
> > what interface talks to the local intranet and what interface only talks
> > to other cluster machines?
>
> Only by subnetting. The port (Samba, mail, et al.) is irrelevant to
> the ethernet device. The network interface card cares only about IP
> address.
>
> > Will they need to be different sub-nets to make this work?
>
> Yes, if you don't want to mix differing traffic on the same wire.
That's the goal. The cluster machines should talk to each other (on their
own subnet) through the gigabit layer 3 switch in the machine room. That
should enable isolation from other traffic, right?
In addition, I'll bind the second gigabit ethernet card to a different subnet,
although it will plug into the same layer 3 gigabit switch in the machine room.
This interface will be used for samba data serving to the local network.
The layer 3 switch will uplink to the local network layer 3 gigabit switch.
Does this get me to where I want to be, or am I still disillusioned.
ASCII drawing follows that shows what I HOPE to accomplish:
eth1 on cluster machines are subnet 1
eth2 on cluster mnaster is subnet 2 (local network)
Cluster master does cluster management and computation
Cluster slave(s) do computation
Cluster master does samba serving
__________ __________
| eth1 |-----| |-----| eth1 |
| cluster| __|____________|__ | cluster|
| master | | layer 3 switch | | slave |
| eth2 |---| gigabit | | |
|________| |________________| |________|
|
_______|__________
| layer 3 switch |
| gigabit |
|________________|
|
_____|_________
| local net |
|many machines|
|_____________|
I assume I still need to do some routing configuration to make this work?
thanks,
-chuck
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