Re: VLAN switching in linux kernel...

[David T Hollis]

On Fri, 2003-12-19 at 07:13, Madhavi wrote:
> Hi,
> 
> I have a doubt regarding the VLAN operation of the Standard Linux kernel
> (linux-2.4.20).
> 
> My network setup is something like this:
> 
> ---+---------------+------ VLAN ID 200
>    |eth0.200       |eth0.200
> +------+       +------+
> |  HA  |       |Router|
> +------+       +------+
>                    |eth1.300
> -----------+-------------- VLAN ID 300
>            |eth0.300
>         +------+
>         |  HB  |
>         +------+
> 
> When I send ping packets from HA to HB over the interface eth0.200, is
> possible for the Router (using linux-2.4.20 with CONFIG_8021Q option) to
> switch packets from VLAN 200 to VLAN 300?
> 
> Is this VLAN switching functionality supported by the standard linux kernel?
> Is there some extra configuration, some patches or sources that can support
> this feature for linux?
> 
> I would be a great help to me if someone could answer this or give some
> pointers to this?
> 
> Thanks & Regards
> Madhavi.
> 

You would route between the two VLANs.  They are two different broadcast
domains, you need to route them at Layer 3.  HA would have a route or
default gw pointed at ROUTER which has IP forwarding turned on and you
should be able to hit HB.

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