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Trunking
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Port Mirroring
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VLANs
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For example, VLANs can be configured from ports belonging to different stack members, or configure port mirroring from a second stack member to a third
stack member. Applications running in a stacking configuration are centralized. For example, the Spanning Tree Protocol for the entire stack runs on the master
unit. Device software is downloaded separately for each stack member.
PowerConnect 3324/3348 stacking architecture provides dynamic learning for the stacking topology, while detecting and reconfiguring the ports with minimal
operational impact in the event of:
Unit Failure
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Inter-unit Link Loss
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Unit Insertion
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Removal of a Stacking Unit
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Stack Members and Unit ID
The stacking operation mode is determined during the Boot process.
PowerConnect 3324/3348 units are shipped with a default Unit ID of one. The Unit ID is essential to the stacking configuration. If a stack member reboots
without a stacking module, the device operates as a stand-alone until the device is reset. If a PowerConnect 3324/3348 unit is operating as a stand-alone
unit, all stacking LEDs are off. The Unit ID is not erased and remains valid if the unit is reconnected to a stack.
NOTE:
The stacking module must be inserted into port G2 for the stack to operate. If the stacking module is inserted in port G1, a warning message is
displayed on the console.
When the master unit boots or when inserting or removing a stack member, the master unit initiates a stacking discover process. If two members are
discovered with the same Unit ID, or a master unit is not found, the entire stack cannot function. The stacking LED remains red.
Configuration Handling
In a PowerConnect 3324/3348 operative stack, the stack master is responsible for the stack configuration. Each stack member does not have a separate
configuration file. Each port in the stack has a specific Unit ID/port type and port number, which is part of both the configuration commands and the
configuration files. Configuration files are managed only from the PowerConnect 3324/3348 stack master, including:
Saving to the FLASH.
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Uploading Configuration files to an external TFTP Server.
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Downloading Configuration files from an external TFTP Server.
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NOTE:
Stack configuration for all configured ports is saved, even if the stack is reset and/or the ports are no longer present.
Configuration files are changed only through explicit user configuration. In addition, Configuration files are not automatically modified when:
Units are added.
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Units are removed.
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Units are reassigned Unit IDs.
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Units toggle between stacking mode and stand-alone mode.
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Each time the system reboots, the stored configuration is written in the Startup Configuration file.
If a PowerConnect 3324/3348 stack member is removed from the stack, and then replaced with the same Unit ID, the stack member is configured with the
original device configuration.
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