If you are looking for real fun, aggregate redundant links with etherchannel, then disable STP. Il 09/lug/2014 18:21 "Victor Sudakov" <v...@mpeks.tomsk.su> ha scritto:
> John Gaffney wrote: > > You could consider MST to reduce the number of STP instances. > > Sometimes that can increase efficiency. > > Am I correct to assume that every time I need to move a vlan from one > MST instance to another, my whole MST domain will fall apart until the > MST reconfiguration is complete on all the switches? > > Somehow I don't like this idea. > > > > However what you are probably looking for is "spanning-tree > > diameter" command. If I recall that can make some auto adjustments > > to STP timers to accommodate for large switched networks. > > Even with the timer adjustments the maximum diameter is about 18 > devices. Still my train does miraculously work provided the root > switch is in the middle. > > > > You should also be aware that 20 switches connected in a straight > > line (hence middle switch) gives you a single point of failure. > > It is not exactly so because the radio equipment has a way to shunt > the failed switch. So the continuity of the train can be quickly > restored. But it is a different topic. > > I also have a backup root close to the middle of the train. > > This is also the reason why going all L3 is not an option. You cannot > simply shunt a router. > > > If it is truly a "train" of switches you could also not run STP - no > > ring/redundant link = no loop. > > As I have already said before, 'I have a "train" topology with some > redundant links between neighboring switches'. > > There are however no rings in the sense that redundant links are only > between neighbors. > > > -- > Victor Sudakov, VAS4-RIPE, VAS47-RIPN > sip:suda...@sibptus.tomsk.ru > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/