CCS Network Operations has identified an unreliable component in the CCS Machine Room subnet. This component is a 12 Ethernet plus 1 FDDI port bridge that is used to provide connectivity to systems connected to the machine-room subnet (130.63.236.x). On several occasions over the past week this bridge has crashed and disrupted the regular flow of traffic on this subnet. This has resulted in intermittent service outages to the e-mail server complex, the Phoenix cluster, SOL, ORION, VM1, VM2 and other machine-room based services. In an effort to stabilize the situation, Network Operations will be replacing the existing bridge with an entirely different model that has already proven itself in the York University Network. The repair work will be undertaken between Saturday October 28, 23:00 and Sunday October 29, 06:00. During this interval access to those services which are connected to the CCS Machine Room subnet will be disrupted. This includes the following systems: maple-fi0.avpmi.yorku.ca, barrie-fi0.avpmi.yorku.ca, halton-fi0.avpmi.yorku.ca, hexamon.ccs.yorku.ca, hegira.ccs.yorku.ca, touchtone.ccs.yorku.ca, qms3235a.ccs.yorku.ca, enterprise.ccs.yorku.ca, leaf.ccs.yorku.ca, prt1.ccs.yorku.ca, sunburst.ccs.yorku.ca, lexington.ccs.yorku.ca, duskdawn.ccs.yorku.ca, bedlam.ccs.yorku.ca, pandora.ccs.yorku.ca, verdi.ccs.yorku.ca, foxglove.ccs.yorku.ca, wonga.ccs.yorku.ca, yetti.cs.yorku.ca, elearn.edu.yorku.ca, psoft.mis.yorku.ca, psoft2.mis.yorku.ca,angel.phoenix.yorku.ca, satyr.phoenix.yorku.ca, dekan.phoenix.yorku.ca, griffin.phoenix.yorku.ca, genii.phoenix.yorku.ca, siren.phoenix.yorku.ca, aixsys.phoenix.yorku.ca, hotspur.psych.yorku.ca, arrakis.sci.yorku.ca, herzberg.sci.yorku.ca, topaz.sis.yorku.ca, laurel.yorku.ca, picazuro.yorku.ca, nexus.yorku.ca, trocaz.yorku.ca, rufous.yorku.ca, afep.yorku.ca, comoro.yorku.ca, vm1.yorku.ca, vm2.yorku.ca, orion.yorku.ca, sol.yorku.ca Eriks Rugelis Network Operations -- --- Eriks Rugelis York University, Network Operations Computing and Communications Services, 029 Steacie Science Library, 4700 Keele Street, North York, Ontario, Canada. M3J 1P3 E-Mail: [log in to unmask] Ma Bell: +1 416 736 5257 x.22688 FAX: +1 416 736 5830 --- It's the end of the world as we know it, and I feel fine ---