looking for veth like.

looking for veth like.

[Christian Durieux]

Hi,
I need to inter-connect two bridges together.
I want to get this:


----------------                 ------------------


|       br0     |                 |         br1      |


----------------                 ------------------


   (veth0) ^                  ^ (veth1)


                 |___________|

So with my current kernel release (2.6.28-17), I used the virtual Ethernet pair device (veth) kernel module associated to the IP utility.

I did it as follows:

# First bridge
brclr addbr br0
ifconfig br0 up

# Second bridge
brctl addbr br1
ifconfig br1 up

# veth link
ip link add name veth0 type veth peer name veth1
ifconfig veth0 up
ifconfig veth1 up

# insertion
brctl addif br0 veth0
brctl addif br1 veth1

And for such kernel release it works fine.

But now I want to do so with an oldest kernel release (2.6.18-8 for instance).
This old release do not provide the virtual Ethernet pair device module.

Is there a way to  do the same with that oldest kernel release ? 
It there an veth-like module ? (I saw some stuffs suche as etun but can not get it... ?)

Thanks,
Christian.
 		 	   		  
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Re: looking for veth like.

[Rémi Denis-Courmont]

On Fri, 15 Jan 2010 11:55:03 +0000, Christian Durieux
<christian_durieux@hotmail.com> wrote:
> Is there a way to  do the same with that oldest kernel release ?
> It there an veth-like module ? (I saw some stuffs suche as etun but can
> not get it... ?)

Create two tap devices using /dev/net/tun and forward packets between them.

-- 
Rémi Denis-Courmont
http://www.remlab.net
http://fi.linkedin.com/in/remidenis

RE: looking for veth like.

[Christian Durieux]

>
> Create two tap devices using /dev/net/tun and forward packets between them.
>
I've been thinking of this but I need to stay at the kernel level (for performance issue).
 		 	   		  
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RE: looking for veth like.

[Rémi Denis-Courmont]

On Fri, 15 Jan 2010 13:30:28 +0000, Christian Durieux
<christian_durieux@hotmail.com> wrote:
>> Create two tap devices using /dev/net/tun and forward packets between
>> them.

> I've been thinking of this but I need to stay at the kernel level (for
> performance issue).

Obviously, with an old kernel, you can't do something that requires a more
recent kernel. Add two NICs and plug a cross cable between them if you
don't want to involve user land.

-- 
Rémi Denis-Courmont
http://www.remlab.net
http://fi.linkedin.com/in/remidenis