Retro networking / WAN communities

[Paul Koning]

> On Apr 12, 2022, at 3:11 PM, Grant Taylor via cctalk <cctalk at classiccmp.org> wrote:
> 
> On 4/12/22 11:41 AM, Paul Koning via cctalk wrote:
>> ...
>> Spanning tree is indeed another algorithm / protocol, but it's a control plane algorithm with relatively easy time constraints, so it's just SMOP.
> 
> I guess I always assumed that spanning tree came along /after/ and / or /independently/ of bridging / switching.
> 
> After all, the BPDU in spanning tree is "Bridge ..." so that name tends to imply to me that it came about /after/ bridges were a thing on at least some level.

No, definitely not.  The DECbridge-100 included two critical elements: learning / selective forwarding, and spanning tree.  Both were day-one features.  

	paul