How to create a Stack on Dell Networking Force10 S25/S50 Switch

How to create a Stack on Dell Networking Force10 S25/S50 Switch

This Article explains how to create a Stack on Dell Networking Force10 S25/S50 Switches


  1. Important Points to Remember
  2. Needed Hardware
  3. Creating Stack
  4. Verify System and Stack-Port Status
  5. Reset a Switch Removed from Stack to Default

Important Points to Remember

  • You may stack up to eight S25/S50 systems in combination.
  • The S25 and S50 systems support mixed stacking, as long as the units have the same FTOS version.
  • You may not connect 12G and 24G stack ports.

Needed Hardware

Stacking Modules

- not interchangeable

- Types

24 Gigabit - 1 port, Install 2 modules for Ring Topology

12 Gigabit - 2 port


- bi-directional

- length

4 meters

60 centimeters

Picture of Hardware Components

Creating a Stack



FTOS# show version

Verify that each unit has the same FTOS version prior to stacking them together.

FTOS# stack-unit renumber

Pre-configure unit numbers for each unit so that the stacking is deterministic upon boot up. (Optional)

FTOS(config)# stack-unit priority

Configure the switch priority for each unit to make management unit selection deterministic. (Optional)

Connect the units using stacking cables and modules

FTOS# show system brief

Power the stack one unit at a time. Start with the management unit, then the standby, followed by each of the members in order of their assigned stack number (or the position in the stack you want each unit to take). Allow each unit to completely boot, and verify that the unit is detected by the stack manager, and then power on the next unit.

Verify System and Stack-Port Status

Stack#show system stack-ports
Topology: Daisy chain
Interface Connection Link Speed Admin Link Trunk
(Gb/s) Status Status Group
0/51 12 up down
0/52 1/50 12 up up
1/49 2/52 12 up up
1/50 0/52 12 up up
2/51 12 up down
2/52 1/49 12 up up

Stack#show system brief
Stack MAC : 00:01:e8:d5:f9:6f
-- Stack Info --
Unit UnitType Status ReqTyp CurTyp Version Ports
0 Standby online S50V S50V 52
1 Management online S50N S50N 52
2 Member online S50V S50V 52

Reset a Switch Removed from Stack to Default

The running-configuration and startup-configuration are synchronized on all stack units. A stack member that is disconnected from the stack maintain this configuration.

To remove a stack member from the stack, disconnect the stacking cables from the unit. You may do this at any time, whether the unit is powered or unpowered, online or offline.

The stack continues to use the master’s chassis MAC address even after a failover. The MAC address is not refreshed until the stack is reloaded and a different unit becomes the stack manager.

If the removed management unit is brought up as a standalone unit or as part of a different stack, there is a possibility of MAC address collisions.

If you remove a unit in the middle of the stack, the stack will be split into multiple parts, and each will form a new stack according to the stacking algorithm.



FTOS# reset stack-unit 0-11

Reload a stack-unit.

FTOS# reset-self

Reload a member unit, from the unit itself.

FTOS# reset stack-unit 0-11 hard

Reset a stack-unit when the unit is in a problem state.

Код статьи: HOW10584

Дата последнего изменения: 06/02/2016 10:01 AM

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