SNMP Hub management tools

[Matt Braun <matt () MIT EDU>]

Since the System monitoring query had such good results, I am going to try a
variation.  I am looking for SNMP management tools (windows or Unix) that can
use multiple MIBS for an environment with hubs from several different vendors.
The tools need not be GUI, and I am espically interested in 'free' tools.  The
functionality I am looking for includes (but is not limitted to):

        gathering port / board pps and bps information
        port link status 
        the ability to determine what port an IP addresses / MAC addreses is
                connected to
        enable / disable ports 
        reset hub / hub management 

Don't bother reporting on Openview and Optivity...I know about those :-) 

Please send responses to me personally (with URLS or other appropriate
pointers) and I will digest / sumarize them and send them to the list.

                        Matt