Switch Stack Bridge Id And Mac Address; Active And Standby Switch Election And Reelection; Switch Stack Configuration Files; Persistent Mac Address On The Switch Stack - Cisco Catalyst 3560CX Series Manual

Switch Stack Bridge ID and MAC Address

The new priority value takes effect immediately but does not affect the current active device. The new priority
value helps determine which stack member is elected as the new active device when the current active device
or the device stack resets.
Switch Stack Bridge ID and MAC Address
The MAC address of the active switch determines the stack MAC address.
When the stack initializes, the MAC address of the active switch determines the bridge ID that identifies the
stack in the network.
If the active switch changes, the MAC address of the new active switch determines the new bridge ID and
stack MAC address.
If the entire switch stack reloads, the switch stack uses the MAC address of the active switch.

Persistent MAC Address on the Switch Stack

You can also configure stack MAC persistency so that the stack MAC address never changes to the new active
switch MAC address.

Active and Standby Switch Election and Reelection

The active switch is elected or reelected based on one of these factors and in the order listed:
1. The switch that is currently the active switch.
2. The switch with the highest stack member priority value.
Note We recommend assigning the highest priority value to the switch that you prefer to be the active switch. This
ensures that the switch is reelected as active switch if a reelection occurs.
3. The switch with the lowest MAC address.

Switch Stack Configuration Files

The configuration files record these settings:
• System-level (global) configuration settings such as IP, STP, VLAN, and SNMP settings that apply to
• Stack member interface-specific configuration settings that are specific for each stack member
Note The interface-specific settings of the active switch are saved if the active switch is replaced without saving
the running configuration to the startup configuration.
A new, out-of-box device joining a switch stack uses the system-level settings of that switch stack. If a device
is moved to a different switch stack before it is powered on, that device loses its saved configuration file and
Managing Switch Stacks
6
all stack members
Managing Switch Stacks