Dell 7000 Series manual Stack Split with Manager Failure

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Stacking Dell PowerConnect 7000 Series Switches

Scenario 3

The following example contains a similar condition with a master unit failover and consequent stack split with five units in the stack, as #Figure 5 shows.

Figure 5. Stack Split with Manager Failure

Switch 1

Switch 2

Switch 3

Switch 4

Switch 5 Standby

Stack 1

Switch 1

Switch 2

Switch 3

Switch 4

Switch 5 Master Stack 2

In this example, there is no link back to Switch 5 from Switch 1. In this case, if the manager of the stack goes down (failed/rebooted), the stack is split into two different stacks with units 1 and 2 in one stack and units 4 and 5 in another. With this condition, none of the stacks will have a working master within the stack, so both of the stacks will elect new masters for each stack through the process based on which unit has the highest base MAC address.

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Contents Dell Technical White Paper Stacking Dell PowerConnect Series SwitchesStacking Dell PowerConnect 7000 Series Switches Contents Stacking and Management IntroductionApplicability Stacking and Redundancy Stacking and PerformanceDual Stacking Modules Configured in a Ring Power-Up Sequencing Considerations Mixing M6348 and PC7000 Series Switches in a StackConsole#boot auto-copy-sw allow-downgrade Initial Installation and Power-up of a Stack Selecting the Standby Unit Selecting the Master UnitUpdating the Firmware on a Stack Automatic UpdateManual Update FTP Creating a Separate Vlan for File DownloadsFrom the Switching Vlan Vlan Membership page, click Add Navigate to the Routing IP IP Interface Configuration Page Stacking Dell PowerConnect 7000 Series Switches Click Apply Adding a Stack Member with Minimal Interruption Removing a Stack Member with Minimal Interruption Effect of Master Failover on PoE Devices Merging Two Operational StacksMaster Failover Scenario Stack Member FailoverFailover Scenarios Stack Split Stack Split with Manager Failure Nonstop Forwarding Nonstop Forwarding Scenario Initiating a Warm Failover of the Manager UnitNonstop Forwarding Example Router NSF Scenario Configuration via CLIStack Switch Switch NSF Example Parameter Timing NSF Re-convergence TimingSmall Configuration Stacking CLI CommandsSummary Stacking Web Interface