hi, we're trying to debug some strange goings-on here: 1) multicast no longer works in two buildings on campus, i.e., AG doesn't work going outside the building (no incoming or outgoing streams) although it works within the building 2) multicast does work in two others 3) beacon clients work (i.e., show up on the beaconserver page) in the two buildings where multicast doesn't 4) beacon clients don't work in the two buildings where multicast does am using the latest version of the java beacon client on irix and windows in both the buildings that work and those that don't. we're looking into the software on the routers. but this scenario doesn't make sense to us. what's wrong with this picture? any suggestions? it was noted in one case that the unicast packets from the beacon client to the server stopped being sent almost immediately, but we don't know why. it showed up on the server page and then disappeared. thanks, -gurcharan =========================== Gurcharan S. Khanna, Associate Director Research Computing, Dartmouth College gkhanna@dartmouth.edu office: 603-646-1644 http://research.dartmouth.edu/ http://www.dartmouth.edu/~gkhanna