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Cisco Systems QC-29 - page 1
QC-29 Cisco IOS XR Modular Quality o f Service Configuratio n Guide Configuring Modular Quality of Service Congestion Management on Cisco IOS XR Software Congestion management controls congest ion after it has occurred on a netw ork. Congestion can be managed on Cisco IOS XR softw are by using packet queueing meth ods, and b y shaping the packet fl ...
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Cisco Systems QC-29 - page 2
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software Contents QC-30 Cisco IOS XR Modular Quality of Service Configuration Guid e Feature History for Configuring Modular QoS Congestion Management on Cisco IOS XR Software Contents Contents • Prerequisites for Con f iguring QoS Co ngestion Mana gement on Cisc o IOS ...
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Cisco Systems QC-29 - page 3
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software Information About Configuring Qo S Conge stion Management on Cisco IOS XR Software QC-31 Cisco IOS XR Modular Quality o f Service Configuratio n Guide • Lo w-Latency Queu eing with Strict Pri ority Queueing, page QC-32 • T raffic Shaping, page QC-33 • T raf ...
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Cisco Systems QC-29 - page 4
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software Information About Configur ing QoS Congestion Manageme nt on Cisco IOS XR Software QC-32 Cisco IOS XR Modular Quality of Service Configuration Guid e compensate for the excess data that was served pre v iously . As a result, the average amount of data dequeued p ...
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Cisco Systems QC-29 - page 5
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software Information About Configuring Qo S Conge stion Management on Cisco IOS XR Software QC-33 Cisco IOS XR Modular Quality o f Service Configuratio n Guide Traffic Shaping T raff ic shaping allows yo u to control the traf fic flo w exitin g an interface to match its t ...
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Cisco Systems QC-29 - page 6
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software Information About Configur ing QoS Congestion Manageme nt on Cisco IOS XR Software QC-34 Cisco IOS XR Modular Quality of Service Configuration Guid e Figure 2 ill ustrates ho w a traf fic shaping me chanism re gulates traf f ic flo w . Figure 2 How a T raf fic S ...
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Cisco Systems QC-29 - page 7
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software Information About Configuring Qo S Conge stion Management on Cisco IOS XR Software QC-35 Cisco IOS XR Modular Quality o f Service Configuratio n Guide T raffic policing is often co nf igured on interfaces at the edge of a network to limit the rate of traff ic ent ...
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Cisco Systems QC-29 - page 8
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software Information About Configur ing QoS Congestion Manageme nt on Cisco IOS XR Software QC-36 Cisco IOS XR Modular Quality of Service Configuration Guid e Figur e 3 How a T raf fic P olicing Mechanism Regulates T raf fic The time interv al between token updates (Tc) ...
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Cisco Systems QC-29 - page 9
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software How to Configure QoS Co ngestion Management o n Cisco IOS XR Software QC-37 Cisco IOS XR Modular Quality o f Service Configuratio n Guide Traffic Shaping Versus Traffic Policing Although traf fic sh aping and traf fic policing can be implemented together on the s ...
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Cisco Systems QC-29 - page 10
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software How to Configure Qo S Congestion Managemen t on Cisco IOS XR Software QC-38 Cisco IOS XR Modular Quality of Service Configuration Guid e Restrictions The amount of band width configured should be l arge enough to also accommo date Layer 2 overhead. A policy map ...
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Cisco Systems QC-29 - page 11
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software How to Configure QoS Co ngestion Management o n Cisco IOS XR Software QC-39 Cisco IOS XR Modular Quality o f Service Configuratio n Guide Step 4 bandwidth { kbps | percent value } Example: RP/0/RP0/CPU0:router(config-pmap-c)# bandwidth percent 50 Enters policy ma ...
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Cisco Systems QC-29 - page 12
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software How to Configure Qo S Congestion Managemen t on Cisco IOS XR Software QC-40 Cisco IOS XR Modular Quality of Service Configuration Guid e Configuring Low-Latency Queueing with Strict Priority Queueing The priority command conf igures low-l atency q ueueing (LLQ), ...
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Cisco Systems QC-29 - page 13
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software How to Configure QoS Co ngestion Management o n Cisco IOS XR Software QC-41 Cisco IOS XR Modular Quality o f Service Configuratio n Guide SUMMARY STEPS 1. conf igure 2. policy-map policy-name 3. class class-name 4. police cir kbps [ exceed-action action ] 5. prio ...
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Cisco Systems QC-29 - page 14
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software How to Configure Qo S Congestion Managemen t on Cisco IOS XR Software QC-42 Cisco IOS XR Modular Quality of Service Configuration Guid e Configuring Traffic Shaping T raffic shaping allo ws you to control the traf f ic exiting an interf ace to match its transmis ...
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Cisco Systems QC-29 - page 15
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software How to Configure QoS Co ngestion Management o n Cisco IOS XR Software QC-43 Cisco IOS XR Modular Quality o f Service Configuratio n Guide Shaping performed on incoming interfaces is done at the Layer 3 le vel and does not include the Layer 2 header in the ra te c ...
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Cisco Systems QC-29 - page 16
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software How to Configure Qo S Congestion Managemen t on Cisco IOS XR Software QC-44 Cisco IOS XR Modular Quality of Service Configuration Guid e Step 5 exit Example: RP/0/RP0/CPU0:router(config-pmap-c)# exit Returns the router to po licy map conf iguration mode. Step 6 ...
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Cisco Systems QC-29 - page 17
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software How to Configure QoS Co ngestion Management o n Cisco IOS XR Software QC-45 Cisco IOS XR Modular Quality o f Service Configuratio n Guide Configuring Traffic Policing T raffic policing allo ws you to cont rol the maximum rate of traffic se nt or recei ved on an i ...
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Cisco Systems QC-29 - page 18
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software How to Configure Qo S Congestion Managemen t on Cisco IOS XR Software QC-46 Cisco IOS XR Modular Quality of Service Configuration Guid e Step 4 police { cir { kbps | percent percent }} [ bc conform-burst ] [ be peak-burst ] [ conform-action action [ exceed-actio ...
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Cisco Systems QC-29 - page 19
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software Configuration Examples for Configuring Qo S Congestion Ma nagement on Cisco IOS XR Software QC-47 Cisco IOS XR Modular Quality o f Service Configuratio n Guide Configuration Examples for Configuring QoS Congestion Management on Cisco IOS XR Software This section ...
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Cisco Systems QC-29 - page 20
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software Configuration Examples for Configuring QoS Congestio n Management on Cisco IO S XR Software QC-48 Cisco IOS XR Modular Quality of Service Configuration Guid e RP/0/RP0/CPU0:Jun 8 16:55:11.819 : config[65546]: %MGBL-LIBTARCFG-6-COMMIT : Configuration committed by ...
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Cisco Systems QC-29 - page 21
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software Where to Go Next QC-49 Cisco IOS XR Modular Quality o f Service Configuratio n Guide policy-map p2 class voip police cir percent 20 commit RP/0/RP0/CPU0:Jun 8 16:51:51.679 : config[65546]: %MGBL-LIBTARCFG-6-COMMIT : Configuration committed by user 'cisco&apo ...
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Cisco Systems QC-29 - page 22
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software Additional References QC-50 Cisco IOS XR Modular Quality of Service Configuration Guid e Additional References The follo wing sections provide ref erences related to implementing QoS congesti on management on Cisco IOS XR software. Related Documents Standards MI ...
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Cisco Systems QC-29 - page 23
Configuring Modular Quality of Service C ongestion Management on Cisco IOS XR Software Additional References QC-51 Cisco IOS XR Modular Quality o f Service Configuratio n Guide Technical Assistance Description Link The Cisco T echnical Support website co ntains thousands of pa ges of sear chable technical content, including lin ks to products, tech ...
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Cisco Systems QC-29 - page 24
Configuring Modular Quality of Service Con gestion Management on Cisco I OS XR Software Additional References QC-52 Cisco IOS XR Modular Quality of Service Configuration Guid e ...
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