Figure 117. Four-Stacked MXL 10/40GbE Switches
Stack Management Roles
The stack elects the management units for the stack management.
•Stack master — primary management unit, also called the master unit.
•Standby — secondary management unit.
The master holds the control plane and the other units maintain a local copy of the forwarding databases.
From the stack master you can configure:
• System-level features that apply to all stack members.
• Interface-level features for each stack member.
The master synchronizes the following information with the standby unit:
• Stack unit topology
• Stack running configuration (which includes ACL, LACP, STP, SPAN, and so on.)
• Logs
The master switch maintains stack operation with minimal impact in the event of:
• Switch failure
• Inter-switch stacking link failure
• Switch insertion
Stacking 883