Hi Guys,
I have four 6509 switches connected in full mesh. The IOS is 12.2(33)SXI4a. Spanning tree mode configured is RPVST+. The switches are connected using fiber cables.
UDLD default hello interval is 15 sec. Going through Cisco documentation regarding UDLD, I noticed that holdtime of UDLD should be less than convergence time of spanning tree. Taking this into consideration, what should I set UDLD hello interval so that UDLD will take care of unidirectional links without causing a spanning tree loop to occur.