Stacking

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1. Definition

You can connect several Switches over a special Port logical together. So you have following pros:

  • One big Switch with a lots of Port
  • One logical Switch
  • You must only 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!!!

2. Diiference 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

3. Supported Switches

3.1 FlexStack

3.1.1 Catalyst 2960 Series

  • 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

3.1.2 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!!!

3.1.3 Cables

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


3.2 StackWise

3.2.1 3560 Series

  • WS-C3560-8PC-S
  • WS-C3560-12PC-S
  • WS-C3560-24TS-S
  • WS-C3560-24TS-E
  • WS-C3560-48TS-S
  • WS-C3560-48TS-E
  • WS-C3560-24PS-S
  • WS-C3560-24PS-E
  • WS-C3560-48PS-S
  • WS-C3560-48PS-E
  • WS-C3560G-24TS-S
  • WS-C3560G-24TS-E
  • WS-C3560G-48TS-S
  • WS-C3560G-48TS-E
  • WS-C3560G-24PS-S
  • WS-C3560G-24PS-E
  • WS-C3560G-48PS-S
  • WS-C3560G-48PS-E

3.2.2 3750 Series

  • WC-C2948G-GE-TX
  • WS-C3750G-24TS-E1U
  • WS-C3750G-24TS-S1U
  • WS-C3750G-24TS-E
  • WS-C3750G-24TS-S
  • WS-C3750G-24WS-S25
  • WS-C3750G-24WS-S50
  • WS-C3750G-24T-E
  • WS-C3750G-24T-S
  • WS-C3750G-12S-E
  • WS-C3750G-12S-S
  • WS-C3750G-12S-SD
  • WS-C3750G-16TD-E
  • WS-C3750G-16TD-S
  • WS-C3750G-24PS-E
  • WS-C3750G-24PS-S
  • WS-C3750G-48TS-E
  • WS-C3750G-48TS-S
  • WS-C3750G-48PS-E
  • WS-C3750G-48PS-S
  • WS-C3750-48PS-E
  • WS-C3750-48PS-S
  • WS-C3750-48TS-E
  • WS-C3750-48TS-S
  • WS-C3750-24PS-E
  • WS-C3750-24PS-S
  • WS-C3750-24TS-E
  • WS-C3750-24TS-S
  • WS-C3750-24FS-S

3.2.3 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

3.2.4 Cables

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

3.3 GigaStack

3.3.1 3550 Series

  • WS-C3550-12G
  • WS-C3550-12T
  • WS-C3550-24-SMI
  • WS-C3550-24PWR-SMI
  • WS-C3550-24-DC-SMI
  • WS-C3550-24-FX-SMI
  • WS-C3550-24-EMI
  • WS-C3550-24PWR-EMI
  • WS-C3550-48-SMI
  • WS-C3550-48-EMI

3.3.2 2950 / 2950GSeries

  • WS-C2950G-48-EI
  • WS-C2950G-24-EI
  • WS-C2950G-24-EI-DC
  • WS-C2950G-12-EI
  • WS-C2950T-24
  • WS-C2950C-24
  • WS-C2950ST-24-LRE
  • WS-C2950ST-8-LRE
  • WS-C2950-12
  • WS-C2950-24
  • WS-C2950SX-24
  • WS-C2950T-48-SI
  • WS-C2950SX-48-SI

3.3.3 2900-XL Series

  • WS-C2912MF-XL
  • WS-C2924M-XL

3.3.4 3500-XL Series

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

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