Dell PowerConnect PC7024 Stacking Instructions

Also see for PowerConnect 7000 Series: Technical white paper Reference guide

Dell PowerConnect PC7024 Stacking Instructions Manual pdf 23 page image

Stacking Dell PowerConnect 7000 Series SwitchesPage 21Scenario 2Consider the same example with a four-unit stack connected in daisy-chain fashion.Figure 3. Stack SplitIf the link between Switch 2 and Switch 3 is removed, the stack is split into two different stacks withSwitches 1 and 2 in one stack and Switches 3 and 4 in another.The Master unit for each stack is determined by the following criteria: Switch 3 was configured as Master prior to the split, so it will continue to be the Masterunit for Stack 2 (units 3 and 4). If Switch 2 is configured as the Standby, it becomes the Master for Stack 1 (units 1 and2). If none of the units in Stack 1 are configured as Master or Standby, then Stack 1 willhave no Master after the split. The election process will start on these two units, andeither Switch 1 or Switch 2 will come up as a master based on which switch has thehighest base MAC address.In this specific example, there will not be any change in the configuration in Stack 2. Stack 1 will comeup with the previously saved configuration on the new Master elected.Note that stack splits are less likely when the switches are cabled in a ring. For example, if Switch 4was connected to Switch 1 and the link between Switch 2 and Switch 3 was removed, all switcheswould remain members of the single stack with Switch 3 continuing as the Master.Switch 1Switch 2 StandbySwitch 3MasterSwitch 4StandbySwitch 1Switch 2 MasterSwitch 3MasterSwitch 4Stack 1Stack 2