> On Apr 12, 2022, at 3:11 PM, Grant Taylor via cctalk <cctalk@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
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