On Sat, Dec 01, 2001 at 10:30:41AM +0530, Vishwanathan K wrote:

> 
> > > i'm experimenting with brctl. I hv a (linux)box with 2 int. (eth0 &
> > > eth1).
> > > My question is shld I bring eth0 down(ifconfig eth0 down) before doing
> > > the following :
> > >         brctl addbr  B1
> > >         brctl  addif  B1  eth0
> > >         ifconfig B1 up
> > > and keep it down until I delete bridge B1.
> > > Is that the 'proper' way to go about it ?
> >
> > It doesn't matter either way.  Only thing that matters is to delete addresses
> > from eth0.
> 
> Thanks for confirming.
> btw, is there is a real need to delete addresses from eth0.? I understand
> that since eth0 is now
> acting as a bridged interface, there is no requirement for an address.
> But what if I keep the address (on eth0) on ?

It will most likely confuse routing.  Packet will go out through eth0, but
they won't come back on eth0.


> On a related note, if I delete addresses from eth0 & keep them on eth1,
> can we then make the box act as a brouter (bridge + router) ?

Not without extra help, unfortunately.  ebtables should be extended to
provide this functionality, but as far as I know it can't be done yet.


> Also can (or should) a single  interface  behave as a brouter ?

I'm not sure what you mean by that.


> > > Also B1 acts as a pseudo(virutal) interface here, right?
> >
> > Ehm.. well.. yeah, it's a virtual interface all right.. although I'm not
> > sure whether that is what you wanted to know.
> 
> :). You guessed it.
> Hmm..if  I dont want to have a virtual interface (which i can bring
> down later) implementation, the only other (not at all the right) way is
> to probably make the interface(eth0) act as a 'permanently' bridged
> interface. i'm just trying to think of how an interface can be bridged
> w/o the virtual interface idea (which is a pretty cool one).
> hope you got what i meant.

This, to me, sounds somewhat like "I want to drive this nail into the
wall, but I don't want to use a hammer!", if you get what I mean :)


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> 
> Yeah !

Now only if that filter would trim lines at 72 columns at the same
time... :)


cheers,
Lennert
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