Restrictions For Switch Stacks - Cisco Catalyst 2960 series Configuration Manual

Restrictions for Switch Stacks

Restrictions for Switch Stacks
The following are restrictions for your switch stack configuration:
• Stacking is not supported on switches running the LAN Lite image. All switches in the stack must be
• In a mixed stack of Catalyst 2960-X and Catalyst 2960-S switches, the number of supported stack
• In a mixed stack of Catalyst 2960-X and Catalyst 2960-S switches, full stack bandwidth is reduced from
• In a mixed stack of Catalyst 2960-X and Catalyst 2960-S switches, stack convergence time is increased
• Auto-upgrade of stack can not be done when one of the switch in stack is with version Cisco IOS
Information About Switch Stacks
Switch Stack Overview
A switch stack is a set of up to eight stacking-capable switches connected through their stack ports. You can
connect only one switch type in a stack, or you can connect a mix of Catalyst 2960-X and Catalyst 2960-S
switches in the stack. The stack can have one of these configurations:
• Homogeneous stack—A Catalyst 2960-X stack with only Catalyst 2960-X switches as stack members.
• Mixed stack—A stack with a mix of Catalyst 2960-X and Catalyst 2960-S switches. A mixed stack can
The stack master controls the operation of the switch stack, and is the single point of stack-wide management.
From the stack master, you configure:
• System-level (global) features that apply to all stack members
• Interface-level features for each stack member
The stack master contains the saved and running configuration files for the switch stack. The configuration
files include the system-level settings for the switch stack and the interface-level settings for each stack
member. Each stack member has a current copy of these files for back-up purposes.
Supported Features in a Switch Stack
The system-level features supported on the active switchstack master are supported on the entire switch stack.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
718
running the LAN Base image.
members is reduced from eight to four.
80 Gbps to 40 Gbps.
from milliseconds to 1 to 2 seconds.
15.2(3)E. This means that whenever any of the switches in the stack goes into a version mismatch, and
if either master is running Cisco IOS 15.2(3)E, or if a member is running Cisco 15.2(3)E, the member
can not be auto-upgraded to the required version.
A homogenous stack can have up to 8 stack members.
have up to 4 stack members, with either a Catalyst 2960-X or Catalyst 2960-S switch as the stack master.