Cisco 350 Series Administration Manual page 156

Administration: Stack Management
Software Auto Synchronization in Stack
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4
Stack Unit Mode
Each unit has a stack unit mode that indicates the types of units in the stack, as follows:
Native Stack
The stack only consists of devices within the same product line (350 or 550) and with the same
subfamily. For example, this means that an Sx350X device (where only 2-4 uplink ports are
XG ports, while network ports are either fastethernet or gigabitethernet ports) can be stacked
only with the same type of device (it does not matter if the network ports are fastethernet or
gigabitethernet ports) and not with an SG350XG/SX350X device (where all device ports are
XG ports), and vice versa. The same rule holds in regards to 550 family of devices.
Hybrid Stack
In Hybrid Stack mode, all unit types, within the same product line (350 or 550) can be stacked
together, without regard to the type of ports supported by device. An 350 device cannot be
stacked with an 550 device, and vice versa.
To join a unit to a hybrid stack it must be first configured in Hybrid mode. This is done by
setting the Stack Mode to Hybrid Stacking in the
below.
Change Stacking Mode
Change of stacking mode requires system reboot and changing from Native to Hybrid mode
erases device configuration. Before changing from the Native to the Hybrid mode, it is
recommended to save the configuration file to an external server (for example via TFTP or
HTTP).
Changing from Hybrid Stacking mode to Native Stacking mode does not erase the
configuration.
In addition, the 2-4 XG ports of the Sx350X/Sx550X units must be configured as stacking
ports, and connected to the SG350XG/SX350X and SG550XG/SX550X devices stacking
ports.
Stack Management page, as described
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