Category Archives: Stack

Stacking Overview

In Cisco Stack we can have all this switches virtually appear as a single chassis.
Manage all this entire stack of switches with the single mgmt. IP address.


Different Cisco Catalyst Stacking:

Switch Stack Overview:
– A switch stack is a set of up to eight stacking-capable switches connected through their stack ports.
– 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
– Stack master contains the saved and running configuration files for the switch stack.

Prerequisites for Switch Stacks:
All stack members must run the same Cisco IOS software image to ensure compatibility among stack members.

Restrictions for Switch Stacks:
All switches in the stack must be running the LAN Base image.
In a mixed stack, the number of supported stack members is reduced from eight to four.
In a mixed stack, full stack bandwidth is reduced from 80 Gbps to 40 Gbps.
In a mixed stack, stack convergence time is increased from milliseconds to 1 to 2 seconds.

Platform and Configuration:
More Details:

Automatic Election:

TEST-SW04#sh switch
Switch/Stack Mac Address : 6416.8d2d.6680
H/W Current
Switch# Role Mac Address Priority Version State
1 Member 6416.8dd0.b880 1 0 Ready
*2 Master 6416.8d2d.6680 1 0 Ready

TEST-SW04#conf t
TEST-SW04(config)#switch 1 priority 3
Changing the Switch Priority of Switch Number 1 to 3
Do you want to continue?[confirm]
New Priority has been set successfully

Reload Switch 2:
TEST-SW04# reload slot 2(Switch03)

TEST-SW04#sh switch
Switch/Stack Mac Address : 6416.8dd0.b880
H/W Current
Switch# Role Mac Address Priority Version State
*1 Master 6416.8dd0.b880 3 0 Ready
2 Member 0000.0000.0000 0 0 Removed

TEST-SW04#sh switch stack-ports
Switch # Port 1 Port 2
——– —— ——
1 Ok Ok
2 Ok Ok