Question 1

What is a Cisco Catalyst Stack Kit?

Accepted Answer

A Cisco Catalyst Stack Kit is a combination of stacking cables and modules that enables multiple Catalyst switches to operate as a single logical unit for simplified management and redundancy.

Question 2

Which Catalyst switch models support Stack Modules?

Accepted Answer

Catalyst switch models from the 2960-X, 3650, 3850, 9300 and 9400 series support Cisco Stack Modules, allowing scalable stacking of up to nine switches.

Question 3

How many switches can I stack with Cisco Catalyst kits?

Accepted Answer

You can stack up to nine Cisco Catalyst switches in a single stack, depending on the series and Stack Kit bandwidth specifications.

Question 4

What stacking bandwidth do Catalyst Stack Modules provide?

Accepted Answer

Cisco Catalyst Stack Modules deliver up to 480 Gbps of bi-directional throughput per stack, ensuring high-performance inter-switch communication.

Question 5

Can I mix different Catalyst switch models in one stack?

Accepted Answer

Cisco supports stacking only identical switch platforms and software versions; mixing different models or IOS versions is not recommended.

Question 6

What types of stacking cables are used with Catalyst Stack Kits?

Accepted Answer

Cisco Catalyst Stack Kits use proprietary copper or fiber stacking cables—in lengths of 0.5 m, 1 m, and 3 m—designed for low-latency, high-bandwidth interconnects.

Question 7

Are Catalyst Stack Modules hot-swappable?

Accepted Answer

Yes, Cisco Catalyst Stack Modules and cables are hot-swappable, allowing you to add or replace components without shutting down the entire switch stack.

Question 8

How does stacking improve network redundancy?

Accepted Answer

Stacking creates a resilient ring topology; if one switch fails, traffic automatically reroutes over alternative paths, maintaining network uptime.

Question 9

How do I install a Cisco Catalyst Stack Kit?

Accepted Answer

To install a Stack Kit, power down the switches, attach the Stack Module to the backplane, connect the stacking cables in a ring, then power the stack back up.

Question 10

How do I manage a Catalyst switch stack?

Accepted Answer

A Cisco Catalyst stack is managed as a single virtual switch via CLI, Cisco DNA Center, or Cisco Prime, simplifying configuration and monitoring.

Question 11

Can I upgrade software on a stacked Catalyst deployment?

Accepted Answer

Yes, Cisco supports In-Service Software Upgrade (ISSU) on stacked Catalyst switches to minimize downtime during IOS upgrades.

Question 12

How do I monitor the health of my Catalyst stack?

Accepted Answer

Use CLI commands like show switch stack, Cisco DNA Center, or SNMP-based tools to monitor stack member status, bandwidth utilization and link integrity.

Question 13

What licensing considerations apply to Catalyst stacks?

Accepted Answer

Licenses are applied per switch in the stack; ensure each member has the required Cisco DNA or feature license to maintain unified feature access.

Question 14

Can I extend my stack over long distances with fiber?

Accepted Answer

Yes, select Cisco Catalyst Stack Modules support SFP or QSFP fiber transceivers to extend stacking links up to several kilometers.

Question 15

What happens if a stacking cable is disconnected?

Accepted Answer

If a cable is disconnected, the stack reconfigures into a linear topology and traffic reroutes through remaining links, preserving connectivity.

Question 16

How do I choose the right Stack Kit for my network?

Accepted Answer

Select a Stack Kit based on switch series compatibility, required stacking bandwidth, cable length and whether copper or fiber interconnects are needed.

Question 17

Where can I purchase Cisco Catalyst Stack Modules?

Accepted Answer

Cisco Catalyst Stack Modules and Kits are available through Cisco’s authorized resellers, partners and the Cisco Commerce Workspace portal.

Catalyst Stack Kits & Modules

C3650-STACK-KIT (Cisco Catalyst 3650 Stack Module)

C2960X-STACK (Catalyst 2960-X FlexStack Plus Stacking Module)

Questions & Answers

What is a Cisco Catalyst Stack Kit?

Which Catalyst switch models support Stack Modules?

How many switches can I stack with Cisco Catalyst kits?

What stacking bandwidth do Catalyst Stack Modules provide?