Lenovo Flex System Fabric CN4093 User Manual

240 CN4093 Application Guide for N/OS 8.4
Configuring a Stack
Whenstackingmodeisenabledontheswitch,theconfigurationisresettofactory
defaultandtheportnumberingchanges.
Whenaswitchmodeischangedfromstand‐alonetostackorfromstackto
stand‐alone,theactiveandbackupconfigurationwillbeerased.Werecommended
thatyousavethe
configurationtoanexternaldevicebeforechangingtheswitch
mode.
Configuration Overview
Thissectionprovidesproceduresforcreatingastackofswitches.Thehigh‐level
procedureisasfollows:
 Configurethestacksettingstobeavailableafterthenextreboot:
 ChooseoneMasterswitchfortheentirestack.
 Setallstackswitchestostackingmode.
 ConfigurethesamestackingVLANforallswitchesinthestack.
 Configurethedesiredstackinginterlinks.
 Rebootthestackswitches.
 Configurethestackafterthereboot:
 BindMemberswitchestotheMaster.
 AssignaBackupswitch.
Thesetasksarecoveredindetailinthefollowingsections.
Best Configuration Practices
Thefollowingareguidelinesforbuildinganeffectiveswitchstack:
 Alwaysconnectthestackswitchesinacompleteringtopology(seeFigure 25on
page 242).
 Avoiddisruptingthestackconnectionsunnecessarilywhilethestackisin
operation.
 ForenhancedredundancywhencreatingportLAGs,includeportsfrom
differentstackmembersintheLAGs.
 Avoidalteringthestackasnumandcsnumdefinitionsunnecessarilywhilethe
stackisinoperation.
 Wheninstackingmode,thehighestQoSpriorityqueueisreservedforinternal
stackingrequirements.Therefore,onlysevenpriorityqueueswillbeavaila ble
forregularQoSuse.
 ConfigureonlyasmanyQoSlevelsasnecessary.Thisallowsthebestuseof
packetbuffers.

Lenovo Flex System Fabric CN4093 Specifications

General

Brand	Lenovo
Model	Flex System Fabric CN4093
Category	Switch
Language	English