On Tue, 2009-07-14 at 17:56 +0200, Thomas Habets wrote: > On Tue, 14 Jul 2009, Peter Rathlev wrote: > > My bold guess would be that the system limit for number of STP > > instances is 10000/13000 total virtual ports (RPVST/PVST). > > 10'000 is what the documentation said, yes > http://www.cisco.com/en/US/solutions/ns340/ns394/ns50/net_design_guidance0900aecd806fe4bb.pdf > > > Whether having 1800+ STP instances on the same switch is a good idea > > i something completely different. :-) > > Not STP instances. 48 ports of aggregation with 50 VLANs will get you > well over the virtual port limit. It's not "STP on 1800+ VLANs", and > not unheard of.
That's for virtual ports yes. But that's not the same as STP instances. As my lab test shows you can easily exceed 1800 RSTP instances. I kept each of two modules on 1799 virtual ports, but with different VLANs on each. Having more STP instances than VLANs would of course be difficuly, so i guess the limit is around 4000 instances. That's for RSTP. I'm afraid I don't know much about MST. Regards, Peter _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
