I haven't had any cross-vendor problems, even mixing RSTP and MSTP (in configurations for which they are designed to mix).
I think the problems come in more on the mixing vendors and more importantly mixing administrative domains with spanning tree. There are more than a couple of vendors with random spanning-tree quirks. Frankly, I'm surprised at the outpouring of love for spanning-tree on the list. I've on more than one occasion selected a vendor with a ring or a virtual chassis technology to avoid spanning-tree in the core. I was also thrilled at the prospect of something like TRILL. Can someone take it on to make a design recommendation? Jay ######################################################################## To unsubscribe from the MICE-DISCUSS list, click the following link: http://lists.iphouse.net/cgi-bin/wa?SUBED1=MICE-DISCUSS&A=1