[uml-devel] Linking 2 switches

[uml-devel] Linking 2 switches

[Benoit]

Hello,

In order tu make a network of uml located on different machines, I nedded to 
link 2 uml_switch's between themselves via a network connexion. The goal is 
to use UML for linux practices on real machines where we can't have a tun/tap 
connections. 
So I modified uml_switch to listen on tcp port and created uml_uplink which is 
able to connect to a local switch via unix socket and to another switch via a 
tcp connection.

Do you think his is a good solution ?

Benoit



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Re: [uml-devel] Linking 2 switches

[David Coulson]

Jeff Dike wrote:
> What's the matter with just hooking the switches together directly by UDP?

I usually just bridge tap devices across a physical network, or use the 
VLAN stuff in the kernel. Does uml_switch support UDP? Maybe it'd be 
cool if it used multicast out of specified network interfaces :-)

David

-- 
David Coulson                                    email: d@vidcoulson.com
Linux Developer /                          web: http://davidcoulson.net/
Network Engineer                                   phone: (216) 533-6967



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Re: [uml-devel] Linking 2 switches

[Jeff Dike]

benoit.peccatte@enst-bretagne.fr said:
> So I modified uml_switch to listen on tcp port and created uml_uplink
> which is  able to connect to a local switch via unix socket and to
> another switch via a  tcp connection.
>
> Do you think his is a good solution ?

What's the matter with just hooking the switches together directly by UDP?

				Jeff



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Re: [uml-devel] Linking 2 switches

[Benoit]

On Monday 03 November 2003 03:38, you wrote:
> benoit.peccatte@enst-bretagne.fr said:
> > So I modified uml_switch to listen on tcp port and created uml_uplink
> > which is  able to connect to a local switch via unix socket and to
> > another switch via a  tcp connection.
> >
> > Do you think his is a good solution ?
>
> What's the matter with just hooking the switches together directly by UDP?

First it is not implemented in uml_switch (ot maybe I need glasses :- ))
Secondly, I choosed TCP beacause of the easy way to write it (a few lines 
less) which it a totaly arbitrary choice.



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Re: [uml-devel] Linking 2 switches

[Benoit]

On Monday 03 November 2003 03:38, you wrote:
> Jeff Dike wrote:
> > What's the matter with just hooking the switches together directly by
> > UDP?
>
> I usually just bridge tap devices across a physical network, or use the
> VLAN stuff in the kernel. Does uml_switch support UDP? Maybe it'd be
> cool if it used multicast out of specified network interfaces :-)

The problen with tap is that root need to configure a tap device. I can't 
afford such a thing.



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