Advanced Traffic Management Guide K/KA/KB.15.15

NOTE: It is possible for the Standby to have a higher priority than the Commander, if the
priority of the Standby was increased after the Commander becomes the Commander. (The
Commander is not changed unless it fails or is on the Inactive fragment side of a stack that
becomes split).
3. If there are two or more switches whose priority is equally high, then the Commander will
look at the topology of the stack and pick a switch that is the most hops away from the
Commander. This will increase the probability that the Commander and Standby switch will
be in different stack fragments should a failure occur.
4. If the priorities and hop counts of the contenders are the same, then the switch with the lowest
MAC address is selected as the Standby switch.
Understanding stacking election 321