Master Failover With Transparent Transition; Nonstop Forwarding On The Stack; Hot Add/Delete And Firmware Synchronization; Security Features - Dell M6220 User Configuration Manual

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Master Failover with Transparent Transition

The stacking feature supports a

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

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

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. In

addition, 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.).

You can configure rules to limit access to the switch management interface

based on criteria such as access type and source IP address of the

management host. You can also require the user to be authenticated locally or

by an external server, such as a RADIUS server.

Switch Features

M8024 M6348 M8024-k