Specifications

CoS Hardware Resource Configuration
May 09, 2011 Page 16 of 38
1.0 4 txq 4
1.0 5 txq 5
1.0 6 txq 6
1.0 7 txq 7
1.0 8 txq 9
1.0 9 txq 8
1.0 10 txq 8
1.0 11 txq 8
1.0 12 txq 8
1.0 13 txq 8
1.0 14 txq 9
1.0 15 txq 10
Usetheshowcosport‐configtxqcommandtodisplaytheCoSportlayerconfiguration:
System(su)->show cos port-config txq 1.0
* Percentage/queue (if any) are approximations based on
[(slices/queue) / total number of slices]
Transmit Queue Port Configuration Entries
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Port Group Name :WFQConfiguration
Port Group :1
Port Type :0
Assigned Ports :ge.1.3,5,22
Arbiter Mode :Low Latency Queue
Slices/queue :Q [ 0]: LLQ Q [ 1]: 0 Q [ 2]: 0 Q [ 3]: 10
:Q [ 4]: 10 Q [ 5]: 15 Q [ 6]: 15 Q [ 7]: 20
:Q [ 8]: 30 Q [ 9]: LLQ Q [10]: LLQ
Percentage/queue :Q [ 0]: LLQ Q [ 1]: 0% Q [ 2]: 0% Q [ 3]: 10%
:Q [ 4]: 10% Q [ 5]: 15% Q [ 6]: 15% Q [ 7]: 20%
:Q [ 8]: 30% Q [ 9]: LLQ Q [10]: LLQ
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TxQ Rate Shaping Configuration
Eachtransmitqueuehasthecapabilitytorateshapealltrafficbeingtransmittedonthequeue.In
thisexample,weconfigureportge.2.17torate shapealltrafficegressingtransmitqueue8(the
actualhardwarequeue,nottheTxQreference)toathresholdof50%ofthe portsbandwidth.All
queues
remaininthedefaultstrictprioritymode.Anytrafficexceedingthisamountwillbefirst
bufferedandrescheduledfortransmission.Bufferedtrafficisonlydroppedifthebufferfills.Rate
shapingprovidestwoservices.Thebufferingofexcesspacketsassuresthattrafficinexcessofthe
configuredvaluewillbe
rescheduledandtransmittedaslongasthebuffersdonotfill.Thelimit
specifiedassuresthatlowerqueuesareservicedinanoversubscriptionsituationbaseduponthe
defaultstrictprioritymodebehavior.