Enterasys SecureStack B3 User Manual

Configuring Policy Class of Service (CoS)
10-16 Policy Classification Configuration
Configuring Policy Class of Service (CoS)
Using Port-Based or Policy-Based CoS Settings
TheSecureStackB3supportsClassofService(CoS),whichallowsyoutoassignmission‐critical
datatoahigherprioritythroughthedevicebydelayinglesscriticaltrafficduringperiodsof
congestion.Thehigherprioritytrafficgoingthroughthedeviceisservicedfirst(beforelower
prioritytraffic).TheClassofService
capabilityofthedeviceisimplementedbyapriority
queueingmechanism.ClassofServiceisbasedontheIEEE802.1D(802.1p)standardspecification,
andallowsyoutodefineeightpriorities(0‐7,with7grantedhighestpriority)andupto8transmit
queues(0‐7)foreachport.
EnterasysNetworks’enhanced
CoSimplementationallowsyoutousethefollowingmethodsto
configureClassofServiceontheSecureStackB3:
• Allowingtheswitchtoautomaticallyassignpolicy‐basedinboundratelimit ersasdescribed
inthissection.
• Configuringtransmitqueueingonaper‐portbasisasdescribedinChapter 11.
Bydefault,policy‐basedCoS
isdisabledonthedevice,anddefaultoruser‐assignedport‐based
802.1D(802.1p)settingsareusedtodeterminetrafficratelimiting.Whenpolicy‐basedCoSis
enabled,thedefaultanduser‐assignedpolicy‐basedsettingswilloverrideport‐basedsettings
describedinChapter 11.
About Policy-Based CoS Configurations
Onceenabledusingthesetcosstatecommandasdescribedin“setcosstate”onpage 10‐19,you
canaddtothepolicy‐basedCoSfunctionbydefiningnewportgroupings,andassigninginbound
ratelimiters.Theprocessforuser‐definedCoSconfigurationinvolvesthefollowingstepsand
associatedcommands
listedinProcedure 10‐1.Anexamplefollowstheprocedure.
Example
Thisexamplecreatesdifferentinboundratelimitersfortwoportgroupsandthenassignsthemto
trafficwithaCoSsettingof0.
1. Configuretwoportgroups,oneforuserportsandoneforuplinkportsandassignportstothe
groups.Portgroup1.0willrepresentuserports,group2.0
willrepresentuplinkports.
B3(su)->set cos port-config irl 1.0 name Users ports ge.1.1-46
Note: It is recommended that you use Enterasys Networks NetSight Policy Manager as an
alternative to CLI for configuring policy-based CoS on the switches.
Procedure 10-1 User-Defined CoS Configuration
Step Task Command(s)
1. Enable CoS set cos state
2. Create CoS port groups set cos port-config
3. Define physical rate limiters for groups set cos port-resource
4. Create virtual reference for the IRL resource
(physical reference) for each port group
set cos reference
5. Add IRL reference to CoS settings table set cos settings

Enterasys SecureStack B3 Specifications

General

Brand	Enterasys
Model	SecureStack B3
Category	Switch
Language	English