Installing the BayStack 400-ST1 Cascade Module - CXtec

Stack Down ConfigurationsIn Figure 6, data flows from the base unit (unit 1) to thenext switch, which is assigned as unit 2, and continuesuntil the last switch in the stack is assigned as unit 8. Thephysical order of the switches is from top to bottom (unit 1to unit 8).Note: Certain network management station (NMS)applications assume a stack down configuration forthe graphical user interface (GUI) that represents thestack. For this reason, Nortel Networks recommendsthat you always configure the top stack unit as the baseunit.In any stack configuration, the following applies:• The entire stack becomes a single logical unit within30 seconds after the base unit initialization.• You can attach an RS-232 communications cable tothe Console/Comm port of any switch in the stack.• In a mixed stack that contains one or more BusinessPolicy Switches, you can downline upgrade the entirestack only from a Business Policy Switch.• You can access and manage the stack using aTELNET connection or any generic SNMPmanagement tool through any switch port that is partof the stack configuration.14