Stacking

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Definition

You can connect several Switches over a special Port logically together, which gives you the following opportunities:

  • One big Switch with a lots of Ports
  • One logical Switch
  • You only have to manage one switch
  • Minimal latency between the devices

Cisco has three difference techniques, FlexStack, StackWise and GigaStack
!!!Note: It works only between the same series!!!

the difference between FlexStack and StackWise

Cisco Catalyst 2960-S Stacking Cisco Catalyst 3750-X StackWise
Device limit 4 units 9 units
Stack bandwidth 10G/20G 32G/64G
Architecture Hardware drop table Ring (destination stripping)
Dynamic ring load balancing No Yes
Stack convergence 1-2 seconds Few milliseconds
Stack quality of service (QoS) Applied hop by hop Applied on ingress
Management Single IP address, SNMP, syslog Single IP address, SNMP, syslog
Configuration Single config and CLI, auto image and config update Single config and CLI, auto image and config update
Show and debug commands Unified Unified
Single forwarding and control plane Synchronize Address Resolution Protocol (ARP), MAC address, Internet Group Management Protocol (IGMP), VLAN tables Synchronize Address Resolution Protocol (ARP), MAC address, Internet Group Management Protocol (IGMP), VLAN tables, routing tables
Cross-stack features Yes Yes
Single bridge-ID Yes Yes
Redundancy Stack master 1:N redundancy Stack master 1:N redundancy

Supported Switches

FlexStack

Catalyst 2960 Series

Catalyst 2960-S Series

  • WS-C2960S-48FPD-L
  • WS-C2960S-48LPD-L
  • WS-C2960S-24PD-L
  • WS-C2960S-48TD-L
  • WS-C2960S-24TD-L
  • WS-C2960S-48FPS-L
  • WS-C2960S-48LPS-L
  • WS-C2960S-24PS-L
  • WS-C2960S-48TS-L
  • WS-C2960S-24TS-L
  • WS-C2960PD-8TT-L
  • WS-C2960-8TC-L
  • WS-C2960-24TT-L
  • WS-C2960-48TT-L
  • WS-C2960-24LT-L
  • WS-C2960-24PC-L
  • WS-C2960-48PST-L
  • WS-C2960-48TC-L
  • WS-C2960G-8TC-L
  • WS-C2960G-24TC-L
  • WS-C2960G-48TC-L


!!! Note: You need the C2960S-STACK Module for the Catalyst 2960 and Catalyst 2960-S series!!!

Cables

  • CAB-STK-E-0.5M=
  • CAB-STK-E-1M=
  • CAB-STK-E-3M=


StackWise

Catalyst 3560 Series

Catalyst 3750 Series

Catalyst 3750-E Series

  • WS-C3750E-24TD-S
  • WS-C3750E-24TD-SD
  • WS-C3750E-24TD-E
  • WS-C3750E-48TD-S
  • WS-C3750E-48TD-E
  • WS-C3750E-48TD-SD
  • WS-C3750E-24PD-S
  • WS-C3750E-24PD-E
  • WS-C3750E-48PD-S
  • WS-C3750E-48PD-E
  • WS-C3750E-48PD-SF
  • WS-C3750E-48PD-EF

Cables

  • CAB-STACK-50CM=
  • CAB-STACK-1M=
  • CAB-STACK-3M=

GigaStack

Catalyst 3550 Series

Catalyst 2950 / 2950G Series

Catalyst 2900-XL Series

  • WS-C2912MF-XL
  • WS-C2924M-XL

Catalyst 3500-XL Series

  • WS-C3508G-XL
  • WS-C3512G-XL
  • WS-C3524G-XL
  • WS-C3548G-XL

!!!Note: You need the GigaStack GBICto connect one to the other!!!