Lenovo Flex System Fabric CN4093 User Manual

© Copyright Lenovo 2017 Chapter 17: FCoE and CEE 319
Allocating Bandwidth
Allocated Bandwidth for PGID 0 Through 7
Theadministratormayallocateaportionoftheswitch’savailablebandwidthto
PGIDs0through7.Availablebandwidthisdefinedastheamountoflink
bandwidththatremainsafterprioritieswithinPGID15areserviced(see
“UnlimitedBandwidthforPGID15”onpage 319),andassu mingthatallPGIDs
arefully
subscribed.IfanyPGIDdoesnotfullyconsumeitsallocatedbandwidth,
theunusedportionismadeavailabletotheotherprioritygroups.
Prioritygroupbandwidthallocationcanbeconfiguredusingthefollowing
command:
wherebandwidthallocationrepresentsthepercentageoflinkbandwidth,specified
asanumberbetween0and100,in1%
increments.
Thefollowingbandwidthallocationrulesapply:
 Bandwidthallocationmustbe0%foranyPGIDthathasnoassigned802.1ppri‐
orityvalues.
 AnyPGIDassignedoneormorepriorityvaluesmusthaveabandwidthallocation
greaterthan0%.
 Totalbandwidthallocationforgroups0through7mustequalexactly100%.
IncreasingorreducingthebandwidthallocationofanyPGIDalsorequires
adjustingtheallocationofotherPGIDstocompensate.
Iftheseconditionsarenotmet,theswitchwillreportanerrorwhenapplyingthe
configuration.
Note: Actualbandwidthusedby
anyspecificPGIDmayvaryfromconfigured
valuesbyupto10%oftheavailablebandwidthinaccordancewith802.1QazETS
standard.Forexample,asettingof10%maybeservedanywherefrom0%to20%
oftheavailablebandwidthatanygiventime.
Unlimited Bandwidth for PGID 15
PGID15ispermittedunlimitedbandwidthandisgenerallyintendedforcritical
traffic(suchasswitchmanagement).Trafficinthisgroupisgivenhighestpriority
andisservedbeforethetrafficinanyotherprioritygroup.
IfPGID15haslowtrafficlevels,mostoftheswitch’sbandwidthwillbeavailable
to
serveprioritygroups0through7.However,ifPGID15consumesalargerpartof
theswitch’stotalbandwidth,theamountavailabletotheothergroupsisreduced.
Note: ConsidertrafficloadwhenassigningpriorityvaluestoPGID15 .Heavy
trafficinthisgroupmayrestrictthebandwidthavailabletoother
groups.
CN 4093(config)# cee global ets priority-group pgid <prioritygroupnumber>
bandwidth <bandwidth allocation> pgid <prioritygroupnumber> bandwidth
<bandwidth allocation>

Lenovo Flex System Fabric CN4093 Specifications

General

Brand	Lenovo
Model	Flex System Fabric CN4093
Category	Switch
Language	English