The maintenance yesterday is now complete and the new switch is in place. You machine has very likely changed ports. You can see the new configuration on the MRTG page:

http://log.koumbit.net/mrtg/

Most of you should be at ports above 36.

The statistics from the old switch are still available here:

http://log.koumbit.net/mrtg.pre-sw3/

Sorry for the trouble.