Administrator Guide
Stacking
Using the Dell EMC Networking OS stacking feature, you can interconnect multiple switch units with stacking ports or front end
user ports. The stack becomes manageable as a single switch through the stack management unit.
The system accepts Unit ID numbers from 1 to 6 and it supports stacking up to six units.
Topics:
• Stacking Overview
• Important Points to Remember
• Stacking Installation Tasks
• Stacking Configuration Tasks
• Verify a Stack Configuration
• Remove Units or Front End Ports from a Stack
• Troubleshoot a Stack
Stacking Overview
Dell EMC Networking OS elects a management (master) unit, a standby unit, and all other units are member units.
Dell EMC Networking OS presents all of the units. For example, to access GigabitEthernet Port 1 on Stack Unit 1, enter
interface tengigabitethernet 1/1 from CONFIGURATION mode.
Stack Management Roles
The stack elects the management units for the stack management.
● Stack master — primary management unit, also called the master unit.
● Standby — secondary management unit.
● Stack units — the remaining units in the stack, also called stack members. The system supports up to six stack units.
The master holds the control plane and the other units maintain a local copy of the forwarding databases. From the stack
master you can configure:
● System-level features that apply to all stack members.
● Interface-level features for each stack member.
The master synchronizes the following information with the standby unit:
● Stack unit topology
● Stack running configuration (which includes ACL, LACP, STP, SPAN, and so on.)
● Logs.
The master switch maintains stack operation with minimal impact in the event of:
● Switch failure
● Inter-switch stacking link failure
● Switch insertion
● Switch removal
If the master switch goes off line, the standby replaces it as the new master and the switch with the next highest priority or
MAC address becomes standby.
49
816 Stacking