DELL N3000 Manual Do Utilizador

Switch Feature Overview

The stacking feature supports a 

standby or backup unit that assumes the 

stack master role if the stack master fails. As soon as a stack master failure is 

detected, the standby unit initializes the control plane and enables all other 

stack units with the current configuration. The standby unit maintains a 

synchronized copy of the running configuration for the stack. 

The Nonstop Forwarding (NSF) feature allows the forwarding plane of stack 

units to continue to forward packets while the control and management 

planes restart as a result of a power failure, hardware failure, or software fault 

on the stack master and allows the standby switch to quickly takeover as the 

master.

You can add and remove units to and from the stack without cycling the 

power. When you add a unit, the Stack Firmware Synchronization feature, if 

enabled, automatically synchronizes the firmware version with the version 

running on the stack master. The synchronization operation may result in 

either an upgrade or a downgrade of firmware on the mismatched stack 

member. Once the firmware is synchronized on a member unit, the running-

config on the member is updated to match the master switch. The startup-

config on the standby and member switches is not updated to match the 

master switch due to configuration changes on the master switch. Saving the 

startup config on the master switch also saves it to the startup config on all 

the other stack members.The hardware configuration of every switch is 

updated to match the master switch (unit number, slot configuration, stack 

member number, etc.).