Cisco Cisco FastHub 412M 10 100 Repeater

In a stack of hubs where hub 1 is the FastHub 400 M1 hub and hubs 2, 3, and 4 are FastHub 400 
unmanaged hubs, these conditions apply:

If you remove hub 3 and replace it with a new hub (hub A), the new hub keeps its default 
configuration. (See 

If hub 4 is removed for troubleshooting purposes and later reinstalled in the second position in 
the stack, the M1 hub recognizes the serial number of that hub as belonging to one of its saved 
configurations and applies the previously saved hub 4 configuration. (See 

.)

To reset the nonvolatile random-access memory (NVRAM) configuration settings of one or both 
management hubs in a redundant stack configuration, note the following guidelines. 

The primary management hub is referred to as the M1 hub. The secondary management hub is referred 
to as the M2 hub.

When a second FastHub 400 managed hub is added to a stack, the new hub, referred to as the M2 
hub, learns the saved configuration settings for the stack from the M1 hub. If the M1 hub fails, the 
M2 hub uses the saved configuration of the M1 hub. 

Hub 1

Hub 1 (store M1)

Hub 2

Hub 2 (store 2)

(Hub 3) ----> Hub A ----> Hub 3 (store A: default)

Hub 4

Hub 4 (store 4)

Hub 1

Hub 1 (store M1)

Hub 2 -------> Hub 4 ----> Hub 2 (store 4: saved)

Hub 3A ---->

Hub 3 (store 2: saved)

(Hub 4)

Hub 4 (store 3A: saved)