RFC: ported NetBSD if_bridge

Bjoern A. Zeeb bzeeb-lists at lists.zabbadoz.net
Sat Apr 17 10:54:54 PDT 2004

On Sat, 17 Apr 2004, Robert Watson wrote:

> On Sat, 17 Apr 2004, Robert Watson wrote:
> > On 17 Apr 2004, Lowell Gilbert wrote:
> >
> > > They're referring to IEEE 802.1d.  This is an important feature for
> > > building large bridged networks.
> >
> > And it's an important part of many ethernet-layer redundancy solutions,
> > since it allows fail-over when one bridging element or graph edge goes
> > offline.  It's something we really missed in some research work I was
> > working on to build link layer filters, since it was an easy way to
> > provide basic fail-over in the presence of ethernet link failures (and
> > they happen a lot!)
> Just as a followup for those not familiar with spanning tree in the
> context of ethernet, here's a URL in one of Cisco's product manuals:
>   http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/rel_5_2/config/spantree.htm
> It talks a bit about how the spanning tree algorithm applies to ethernet,
> and applications of spanning tree.

here are the other resources that come to my mind for those how like


and 'the thread' I remember about spanning tree is this one ;-)
(and perhaps related threads; don't remember):

	"Spanning tree melt down ?"

starting at



Bjoern A. Zeeb				bzeeb at Zabbadoz dot NeT
56 69 73 69 74				http://www.zabbadoz.net/

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