Netgear GS728TXS GS728TXS/GS752TXS Software Administration Manual - Page 81
Switch Stack Configuration, Stacking Overview
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3. Switch Stack Configuration 3 Stacking Overview A stackable switch is a switch that is a fully functional operating standalone, but can also be set up to operate together with up to six switches, with this group of switches showing the characteristics of a single switch while having the port capacity of the sum of the combined switches. One of the switches in the stack controls the operation of the stack. This switch is called the stack manager. The remaining switches in the stack are stack members. The stack members use stacking technology to behave and work together as a unified system. Layer 2 and above protocols present the entire switch stack as a single entity to the network. The stack manager is the single point of stack-wide management. From the stack manager, you configure the following: • System-level (global) features that apply to all stack members • Interface-level features for all interfaces on any stack member A switch stack is identified in the network by its network IP address. The network IP address is assigned according to the MAC address of the stack manager. Every stack member is uniquely identified by its own stack member number. All stack members are eligible stack managers. If the stack manager becomes unavailable, the remaining stack members participate in electing a new stack manager from among themselves. The following factors determine which switch is elected as the stack manager: • The switch that is manager always has priority to retain the role of manager • Assigned priority • MAC address All stack members must run the same software version to ensure compatibility between stack members. The software versions on all stack members, including the stack manager, must be the same. This helps ensure full compatibility in the stack protocol version among the stack members. If a stack member is running a software version that is not the same as the stack manager, then the stack member is not allowed to join the stack. The stack manager contains the saved and running configuration files for the switch stack. The configuration files include the system-level settings for the switch stack and the interface-level 81