[VLAN] broadcasts go where?

[Ben Greear]

Carlos Carvalho wrote:
> Ben Greear (greearb at candelatech.com) wrote on 19 May 2006 10:45:
>  >Carlos Carvalho wrote:
>  >> Ben Greear (greearb at candelatech.com) wrote on 19 May 2006 10:17:
>  >>  >If you are sending out, then it will only go out one interface.
>  >> 
>  >> Is there a way to make it go to all interfaces? This is necessary for
>  >> broadcast-based services.
>  >
>  >If your switch has all of the VLANs in the broadcast domain (bridge group), then one
>  >pkt will arrive per VLAN.  Perhaps you could give us more details as to
>  >exactly what you are trying to do?
> 
> I've grouped machines in the department in vlans, so they only
> communicate inside their group. We also have some servers which must
> be accessible by everyone, so I put them in all vlans. They have the
> same IP in all vlans.
> 
> Everything works fine except that broadcasts from the servers don't
> reach all machines, only those in the eth0 group, that is, the
> untagged vlan. So I ask if there's a way to make the server broadcast
> in all vlans.

That sounds like a fairly nasty hack.

Maybe use a VLAN router to interface with your individual VLANs
and then put the common servers on a separate VLAN?  Then no need to
broadcast or play funny games with IP addresses on your server...

-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com