Reference Guide

Stacking S-Series Switches | 955

Stacking S-Series Switches

Stacking S-Series Switches is supported on platform s

This chapter contains the following sections:

• S-Series Stacking Overview

• Important Points to Remember

• S-Series Stacking Configuration Tasks

S-Series Stacking Overview

Up to eight S-Series systems can be interconnected so that all of the units function as a single unit.

A stack is analogous to an E-Series or C-Series system with redundant RPMs and multiple line cards.

FTOS elects a primary and secondary management unit, and all other units are member units. The

forwarding database resides on the primary, and all other units maintain a sychnronized local copy. Each

unit in the stack makes forwarding decisions based on their local copy.

FTOS presents all of the units like line cards; for example, to access GigabitEthernet Port 1 on Stack Unit

0, enter

interface gigabitethernet 0/1 from CONFIGURATION mode.

High Availability on S-Series Stacks

S-Series stacks have primary and secondary management units analogous to Dell Force10 Route Processor

Modules . The management units synchronize the running configuration and protocol states so that the

system fails over in the event of a hardware or software fault on the primary. In such an event, or when the

primary is removed, the secondary unit becomes the stack manager and FTOS elects a new secondary.

FTOS resets the failed management unit, and once online, it becomes a member unit; the remaining

members remain online.

Stack#show redundancy

-- Stack-unit Status --

------------------------------------------------

Mgmt ID: 0

Stack-unit ID: 1

Stack-unit Redundancy Role: Primary

Note: S-Series Stacking is not supported on the S60 system.