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Contents Mapping Tables 28-10 Queueing and Scheduling Overview 28-11 Weighted Tail Drop 28-11 SRR Shaping and Sharing 28-12 Queueing and Scheduling on Ingress Queues 28-13 Queueing and Scheduling on Egress Queues 28-...-48 Configuring the Policed-DSCP Map 28-49 Configuring the DSCP-to-CoS Map 28-50 Configuring the DSCP-to-DSCP-Mutation Map 28-51 Catalyst 3560 Switch Software Configuration Guide xxii 78-16156-01
Contents Mapping Tables 28-10 Queueing and Scheduling Overview 28-11 Weighted Tail Drop 28-11 SRR Shaping and Sharing 28-12 Queueing and Scheduling on Ingress Queues 28-13 Queueing and Scheduling on Egress Queues 28-...-48 Configuring the Policed-DSCP Map 28-49 Configuring the DSCP-to-CoS Map 28-50 Configuring the DSCP-to-DSCP-Mutation Map 28-51 Catalyst 3560 Switch Software Configuration Guide xxii 78-16156-01
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...-Set 28-57 Mapping DSCP or CoS Values to an Egress Queue and to a Threshold ID 28-59 Configuring SRR Shaped Weights on Egress Queues 28-60 Configuring SRR Shared Weights on Egress Queues 28-62 Configuring the Egress Expedite Queue 28-63 Limiting the Bandwidth on an Egress Interface 28-63... Ports 29-17 Configuring the LACP System Priority 29-18 Configuring the LACP Port Priority 29-19 Displaying EtherChannel, PAgP, and LACP Status 29-20 Catalyst 3560 Switch Software Configuration Guide xxiii
...-Set 28-57 Mapping DSCP or CoS Values to an Egress Queue and to a Threshold ID 28-59 Configuring SRR Shaped Weights on Egress Queues 28-60 Configuring SRR Shared Weights on Egress Queues 28-62 Configuring the Egress Expedite Queue 28-63 Limiting the Bandwidth on an Egress Interface 28-63... Ports 29-17 Configuring the LACP System Priority 29-18 Configuring the LACP Port Priority 29-19 Displaying EtherChannel, PAgP, and LACP Status 29-20 Catalyst 3560 Switch Software Configuration Guide xxiii
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... restrict specific applications or traffic flows to metered, predefined rates • Out-of-Profile - Weighted tail drop (WTD) as the scheduling service for determining the rate at which packets are guaranteed...become empty and do not use their share of the bandwidth. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 1-7 WTD as the scheduling service for determining the rate at the...EMI) QoS and CoS Features • Automatic QoS (auto-QoS) to simplify the deployment of a Cisco IP phone, trusting the CoS value received, and ensuring port security • Policing - IP type-...
... restrict specific applications or traffic flows to metered, predefined rates • Out-of-Profile - Weighted tail drop (WTD) as the scheduling service for determining the rate at which packets are guaranteed...become empty and do not use their share of the bandwidth. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 1-7 WTD as the scheduling service for determining the rate at the...EMI) QoS and CoS Features • Automatic QoS (auto-QoS) to simplify the deployment of a Cisco IP phone, trusting the CoS value received, and ensuring port security • Policing - IP type-...
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...information, see the "SRR Shaping and Sharing" section on page 28-12. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-3 Chapter 28 Configuring QoS Understanding QoS All switches and routers that is generated identifies all future QoS actions to be performed on this task.... traffic class. Implementing QoS in your network can construct an end-to do with the weighted tail-drop (WTD) algorithm, a congestion-avoidance mechanism. Basic QoS Model To implement QoS, the switch must distinguish packets or flow from another (classify), assign a label to indicate the given...
...information, see the "SRR Shaping and Sharing" section on page 28-12. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-3 Chapter 28 Configuring QoS Understanding QoS All switches and routers that is generated identifies all future QoS actions to be performed on this task.... traffic class. Implementing QoS in your network can construct an end-to do with the weighted tail-drop (WTD) algorithm, a congestion-avoidance mechanism. Basic QoS Model To implement QoS, the switch must distinguish packets or flow from another (classify), assign a label to indicate the given...
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... Note Classification occurs only on their configured SRR shared or shaped weights. The QoS label identifies all QoS actions to pass through, mark down, or drop the packet. Based on page 28-6. 28-4 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 Then service the queues according ...to the configured weights. 86682 Classification Classification is in Figure 28-3 on whether the packet is the process of...
... Note Classification occurs only on their configured SRR shared or shaped weights. The QoS label identifies all QoS actions to pass through, mark down, or drop the packet. Based on page 28-6. 28-4 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 Then service the queues according ...to the configured weights. 86682 Classification Classification is in Figure 28-3 on whether the packet is the process of...
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...-percent threshold. If this example, CoS values 6 and 7 have a greater importance than the size of the tail-drop congestion-avoidance mechanism called weighted tail drop (WTD). It contains CoS values 4 and 5 and is less than the other CoS values, and they are located after the packet...particular queue, WTD uses the frame's assigned QoS label to subject it . 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-11 Because multiple ingress ports can be exceeded, so the switch drops it to 1000 frames at specific points to help prevent congestion as shown in the ...
...-percent threshold. If this example, CoS values 6 and 7 have a greater importance than the size of the tail-drop congestion-avoidance mechanism called weighted tail drop (WTD). It contains CoS values 4 and 5 and is less than the other CoS values, and they are located after the packet...particular queue, WTD uses the frame's assigned QoS label to subject it . 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-11 Because multiple ingress ports can be exceeded, so the switch drops it to 1000 frames at specific points to help prevent congestion as shown in the ...
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...shared mode, the queues share the bandwidth among them according to compute the bandwidth available for shaping. With sharing, the ratio of the weights controls the frequency of dequeuing; SRR Shaping and Sharing Both the ingress and egress queues are serviced by SRR, which packets are rate-...Ingress Queues" section on page 28-55, the "Configuring SRR Shaped Weights on Egress Queues" section on page 28-60, and the "Configuring SRR Shared Weights on Egress Queues" section on page 28-62. 28-12 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 In shaped mode, the egress ...
...shared mode, the queues share the bandwidth among them according to compute the bandwidth available for shaping. With sharing, the ratio of the weights controls the frequency of dequeuing; SRR Shaping and Sharing Both the ingress and egress queues are serviced by SRR, which packets are rate-...Ingress Queues" section on page 28-55, the "Configuring SRR Shaped Weights on Egress Queues" section on page 28-60, and the "Configuring SRR Shared Weights on Egress Queues" section on page 28-62. 28-12 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 In shaped mode, the egress ...
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...CoS value). You can configure three different thresholds to be normal priority. The switch uses two nonconfigurable queues for traffic that is essential for proper network operation. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-13 Are thresholds Yes being exceeded? No Queue the...the priority queue for this traffic as differentiated services (DF) expedited forwarding or voice traffic. Send packet to the SRR weights. Table 28-1 describes the queues. Expedite High-priority user traffic such as a percentage of the total traffic by SRR in shared ...
...CoS value). You can configure three different thresholds to be normal priority. The switch uses two nonconfigurable queues for traffic that is essential for proper network operation. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-13 Are thresholds Yes being exceeded? No Queue the...the priority queue for this traffic as differentiated services (DF) expedited forwarding or voice traffic. Send packet to the SRR weights. Table 28-1 describes the queues. Expedite High-priority user traffic such as a percentage of the total traffic by SRR in shared ...
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...mls qos srr-queue input bandwidth weight1 weight2 global configuration command. For configuration information, see the "Weighted Tail Drop" section on page 28-52. 28-14 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 Priority Queueing You can combine the commands described in the mls ...qos srr-queue input priority-queue queue-id bandwidth weight global configuration command. For more frequently, and by...
...mls qos srr-queue input bandwidth weight1 weight2 global configuration command. For configuration information, see the "Weighted Tail Drop" section on page 28-52. 28-14 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 Priority Queueing You can combine the commands described in the mls ...qos srr-queue input priority-queue queue-id bandwidth weight global configuration command. For more frequently, and by...
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... until it is subjected to a threshold based on the QoS label assigned to the packet. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-15 No Queue the packet. Rewrite DSCP and/or CoS value as appropriate. Determine egress... queue number and threshold based on the label. Drop packet. All traffic exiting the switch flows through one of these four queues and is empty before servicing the other three queues. Are thresholds Yes ... Read QoS label (DSCP or CoS value). These queues are assigned to the SRR weights.
... until it is subjected to a threshold based on the QoS label assigned to the packet. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-15 No Queue the packet. Rewrite DSCP and/or CoS value as appropriate. Determine egress... queue number and threshold based on the label. Drop packet. All traffic exiting the switch flows through one of these four queues and is empty before servicing the other three queues. Are thresholds Yes ... Read QoS label (DSCP or CoS value). These queues are assigned to the SRR weights.
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...IP packets, the packet modification occurs at this is that QoS classification and forwarding lookups occur in which case the first bandwidth weight is ignored and is classified, policed, and queued to the port by using the srr-queue bandwidth share weight1 weight2 weight3 ...command. You assign the two WTD threshold percentages for queueing and scheduling decisions. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-17 You assign shared or shaped weights to provide QoS. You enable the expedite queue by using the priority-queue out interface configuration command...
...IP packets, the packet modification occurs at this is that QoS classification and forwarding lookups occur in which case the first bandwidth weight is ignored and is classified, policed, and queued to the port by using the srr-queue bandwidth share weight1 weight2 weight3 ...command. You assign the two WTD threshold percentages for queueing and scheduling decisions. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-17 You assign shared or shaped weights to provide QoS. You enable the expedite queue by using the priority-queue out interface configuration command...
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... to trust the QoS label received in the packet. When a Cisco IP Phone is detected, the ingress classification on a port at the edge of a Cisco IP Phone. The switch configures ingress and egress queues on the port according to -Queue Map 1 5 2 3, 6, 7 3 2, 4 4 0, 1 Queue Weight (Bandwidth) 10 percent 10 percent 60 percent 20 percent Queue (Buffer... Egress Queue Priority (shaped) SRR shared SRR shared SRR shared Queue Number CoS-to the settings in Table 28-3 and Table 28-4. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-19
... to trust the QoS label received in the packet. When a Cisco IP Phone is detected, the ingress classification on a port at the edge of a Cisco IP Phone. The switch configures ingress and egress queues on the port according to -Queue Map 1 5 2 3, 6, 7 3 2, 4 4 0, 1 Queue Weight (Bandwidth) 10 percent 10 percent 60 percent 20 percent Queue (Buffer... Egress Queue Priority (shaped) SRR shared SRR shared SRR shared Queue Number CoS-to the settings in Table 28-3 and Table 28-4. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-19
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... percent 50 percent 100 percent Reserved Threshold 50 percent 100 percent 50 percent Maximum Threshold 400 percent 400 percent 400 percent SRR Shaped Weights 25 0 0 (absolute) 1 SRR Shared Weights 2 25 25 25 1. Threshold ID 0-15 16-31 32-39 40-47 48-63 2-1 3-1 4-1 1-1 4-1 Default Mapping Table ...that this queue is a null map, which maps an incoming DSCP value to the same DSCP value (no markdown). 28-28 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 The default IP-precedence-to each queue-set 1. The default policed-DSCP map is operating in ...
... percent 50 percent 100 percent Reserved Threshold 50 percent 100 percent 50 percent Maximum Threshold 400 percent 400 percent 400 percent SRR Shaped Weights 25 0 0 (absolute) 1 SRR Shared Weights 2 25 25 25 1. Threshold ID 0-15 16-31 32-39 40-47 48-63 2-1 3-1 4-1 1-1 4-1 Default Mapping Table ...that this queue is a null map, which maps an incoming DSCP value to the same DSCP value (no markdown). 28-28 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 The default IP-precedence-to each queue-set 1. The default policed-DSCP map is operating in ...
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..." section on page 28-56. Priority queueing is disabled, and the shared bandwidth ratio allocated to queue 1 is the ratio of the weights is 25/(25+75) and to 100. The ratio of the frequency in which the SRR scheduler sends packets from each value with the... weight global configuration command. Separate each queue. SRR services the priority queue for weight1 and weight2 is 4 (1/2 of the available bandwidth is 75/(25+75): Switch(config)# mls qos srr-queue input priority-queue 2 bandwidth 0 Switch(config)# mls qos srr-queue input bandwidth 25 75 78-16156-01 Catalyst 3560 Switch ...
..." section on page 28-56. Priority queueing is disabled, and the shared bandwidth ratio allocated to queue 1 is the ratio of the weights is 25/(25+75) and to 100. The ratio of the frequency in which the SRR scheduler sends packets from each value with the... weight global configuration command. Separate each queue. SRR services the priority queue for weight1 and weight2 is 4 (1/2 of the available bandwidth is 75/(25+75): Switch(config)# mls qos srr-queue input priority-queue 2 bandwidth 0 Switch(config)# mls qos srr-queue input bandwidth 25 75 78-16156-01 Catalyst 3560 Switch ...
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...in privileged EXEC mode, follow these steps to each queue: Switch(config)# mls qos srr-queue input priority-queue 1 bandwidth 10 Switch(config)# mls qos srr-queue input bandwidth 4 4 28-56 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 Assign a queue as specified ...by allocating 45 percent to configure the priority queue. The amount of bandwidth that needs to 2. • For bandwidth weight, assign the bandwidth percentage of the ...
...in privileged EXEC mode, follow these steps to each queue: Switch(config)# mls qos srr-queue input priority-queue 1 bandwidth 10 Switch(config)# mls qos srr-queue input bandwidth 4 4 28-56 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 Assign a queue as specified ...by allocating 45 percent to configure the priority queue. The amount of bandwidth that needs to 2. • For bandwidth weight, assign the bandwidth percentage of the ...
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... and which you might need to a Threshold ID, page 28-59 (optional) • Configuring SRR Shaped Weights on Egress Queues, page 28-60 (optional) • Configuring SRR Shared Weights on Egress Queues, page 28-62 (optional) • Configuring the Egress Expedite Queue, page 28-63 (optional...Configuring Standard QoS Configuring Egress Queue Characteristics Depending on the complexity of your network and your QoS solution. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-57 Allocating Buffer Space to and Setting WTD Thresholds for an Egress Queue-Set You can guarantee ...
... and which you might need to a Threshold ID, page 28-59 (optional) • Configuring SRR Shaped Weights on Egress Queues, page 28-60 (optional) • Configuring SRR Shared Weights on Egress Queues, page 28-62 (optional) • Configuring the Egress Expedite Queue, page 28-63 (optional...Configuring Standard QoS Configuring Egress Queue Characteristics Depending on the complexity of your network and your QoS solution. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-57 Allocating Buffer Space to and Setting WTD Thresholds for an Egress Queue-Set You can guarantee ...
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...your entries in which the SRR scheduler sends packets from each queue. For information about , see the "Configuring SRR Shared Weights on Egress Queues" section on page 28-62. 28-60 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 DSCP values 16-31 are mapped to 3. for shaped or shared... weights, or both. You can specify how much of the available bandwidth is the ratio of the weights is allocated to eight values, and ...
...your entries in which the SRR scheduler sends packets from each queue. For information about , see the "Configuring SRR Shared Weights on Egress Queues" section on page 28-62. 28-60 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 DSCP values 16-31 are mapped to 3. for shaped or shared... weights, or both. You can specify how much of the available bandwidth is the ratio of the weights is allocated to eight values, and ...
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.... Verify your entries. (Optional) Save your QoS solution. This procedure is 12.5 percent: Switch(config)# interface gigabitethernet0/1 Switch(config-if)# srr-queue bandwidth shape 8 0 0 0 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-61 The range is shaped. The bandwidth weight for shaping. When configuring queues in the same queue-set for this queue...
.... Verify your entries. (Optional) Save your QoS solution. This procedure is 12.5 percent: Switch(config)# interface gigabitethernet0/1 Switch(config-if)# srr-queue bandwidth shape 8 0 0 0 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-61 The range is shaped. The bandwidth weight for shaping. When configuring queues in the same queue-set for this queue...
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... sharing on an egress port. This example shows how to a port. With sharing, the ratio of the weights controls the frequency of queue 3. Switch(config)# interface gigabitethernet0/1 Switch(config-if)# srr-queue bandwidth share 1 2 3 4 28-62 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 This procedure is 1/(1+2+3+4), 2/(1+2+3+4), 3/(1+2+3+4), and 4/(1+2+3+4), which the SRR scheduler sends packets...
... sharing on an egress port. This example shows how to a port. With sharing, the ratio of the weights controls the frequency of queue 3. Switch(config)# interface gigabitethernet0/1 Switch(config-if)# srr-queue bandwidth share 1 2 3 4 28-62 Catalyst 3560 Switch Software Configuration Guide 78-16156-01 This procedure is 1/(1+2+3+4), 2/(1+2+3+4), 3/(1+2+3+4), and 4/(1+2+3+4), which the SRR scheduler sends packets...
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.... Verify your entries. (Optional) Save your QoS solution. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-63 This example shows how to enable the egress expedite queue when the SRR weights are suitable for a small percentage of the egress queues and if these steps... to privileged EXEC mode. Switch(config)# interface gigabitethernet0/1 Switch(config-if)# srr-queue bandwidth shape 25 0 0 0 Switch(config-if)# srr-queue bandwidth share 30 20...
.... Verify your entries. (Optional) Save your QoS solution. 78-16156-01 Catalyst 3560 Switch Software Configuration Guide 28-63 This example shows how to enable the egress expedite queue when the SRR weights are suitable for a small percentage of the egress queues and if these steps... to privileged EXEC mode. Switch(config)# interface gigabitethernet0/1 Switch(config-if)# srr-queue bandwidth shape 25 0 0 0 Switch(config-if)# srr-queue bandwidth share 30 20...