Linux Ethernet Bridging - Mar 2008 - [Bridge] span/monitor port

Hi,

I was wondering if there's an established way to set up one or more
ports of a bridge as 'span'
or 'monitor' ports. I.e., once a port is in this state, it discards
any packets it receives, and gets
a copy of any other packet the bridge is forwarding out any other
port. Kind-of like cisco's span
monitor session.

If not, I'd be interested in having a go at it, but wanted to see if
there's anything already there
that I'm missing...

Thanks,
Gabriel

On Fri, 7 Mar 2008 20:10:46 -0500
"Gabriel Somlo" <gsomlo at gmail.com> wrote:
> Hi,
> 
> I was wondering if there's an established way to set up one or more
> ports of a bridge as 'span'
> or 'monitor' ports. I.e., once a port is in this state, it discards
> any packets it receives, and gets
> a copy of any other packet the bridge is forwarding out any other
> port. Kind-of like cisco's span
> monitor session.
> 
> If not, I'd be interested in having a go at it, but wanted to see if
> there's anything already there
> that I'm missing...
> 
It isn't really a bridge function, the way to do this is to use
other facilities like the mirred action (see tc action).