Well. If you own the Netsight software you could create a custom alarm for the "port 19 down" snmp trap. This alarm could be configured to execute a script whenever the specified trap is received by Netsight. For script based switch configuration Enterasys had a little tool suite called "ATG Tools". That would allow to create a simple script to disable port 1. However I am currently unable to find a download source for said ATG Tools. I suppose they are discontinued!?