Cisco Catalyst and Nexus Campus QoS Design

Transcription

1 Cisco Catalyst and Nexus Campus QoS Design 1

2 Cisco Catalyst and Nexus Campus QoS Design Agenda End-to-End QoS Design Strategy Review Campus QoS Design Considerations & Recommendations Cisco Catalyst 2960/3560/3750 QoS Design Cisco Catalyst 4500 QoS Design Cisco Catalyst 6500 QoS Design Cisco Nexus 7000 QoS Design Summary and References Appendix: AutoQoS for Medianet Catalyst 3560/3750 AutoQoS Feature

3 QoS Design Strategy Review Trends In Internet Usage By 2015 Global IP traffic will increase 8-fold The number of IP devices will be more than twice the global population Wireless traffic will exceed wired Non-PC traffic (smartphones, tablets etc.) will account for 15% of all traffic 90% of consumer internet traffic will be video white_paper_c _ns827_networking_solutions_white_paper.html

4 QoS Design Strategy Trends in Voice, Video and Data Media Applications Data Convergence Media Explosion Collabora*ve Media Unmanaged Internet Streaming Internet VoIP YouTube MySpace Other Ad- Hoc App Video Voice IP Video Conf IP Telephony Video Voice IP Video Conf Surveillance Video Telephony HD Video Conf VoD Streaming IP Telephony HD Audio SoGphone Other VoIP TelePresence Web Messaging Data Apps App Sharing Web/Internet Messaging Data Apps App Sharing Web/Internet Messaging WebEx Connec*vity Leveraging Investment Co- Existence Experience Assurance

5 QoS Design Strategy Review RFC 4594-Based Strategic QoS Recommendations Application Per-Hop Admission Queuing & Application Class Behavior Control Dropping Examples VoIP Telephony EF Required Priority Queue (PQ) Cisco IP Phones (G.711, G.729) Broadcast Video CS5 Required (Optional) PQ Cisco IP Video Surveillance / Cisco Enterprise TV Realtime Interactive CS4 Required (Optional) PQ Cisco TelePresence Multimedia Conferencing AF4 Required BW Queue + DSCP WRED Cisco Unified Personal Communicator, WebEx Multimedia Streaming AF3 Recommended BW Queue + DSCP WRED Cisco Digital Media System (VoDs) Network Control CS6 BW Queue EIGRP, OSPF, BGP, HSRP, IKE Call-Signaling CS3 BW Queue SCCP, SIP, H.323 Ops / Admin / Mgmt (OAM) CS2 BW Queue SNMP, SSH, Syslog Transactional Data AF2 BW Queue + DSCP WRED ERP Apps, CRM Apps, Database Apps Bulk Data AF1 BW Queue + DSCP WRED , FTP, Backup Apps, Content Distribution Best Effort DF Default Queue + RED Default Class Scavenger CS1 Min BW Queue (Deferential) YouTube, itunes, BitTorent, Xbox Live

6 QoS Design Strategy Review Business Requirements Will Evolve and Expand over Time 4- Class Model 8- Class Model Voice Interac*ve Video Real*me Streaming Video Signaling / Control Call Signaling Network Control Cri*cal Data Cri*cal Data Best Effort Best Effort Scavenger Time 12- Class Model Voice Real*me Interac*ve Mul*media Conferencing Broadcast Video Mul*media Streaming Call Signaling Network Control Network Management Transac*onal Data Bulk Data Best Effort Scavenger

7 QoS Design Strategy At-A-Glance

8 Campus QoS Design Considerations & Recommendations

9 Cisco Catalyst and Nexus Campus QoS Design Agenda End-to-End QoS Design Strategy Review Campus QoS Design Considerations & Recommendations Cisco Catalyst 2960/3560/3750 QoS Design Cisco Catalyst 4500 QoS Design Cisco Catalyst 6500 QoS Design Cisco Nexus 7000 QoS Design Summary and References Appendix: AutoQoS for Medianet Catalyst 3560/3750 AutoQoS Feature

10 Campus QoS Design Considerations The Case for Campus QoS The primary role of QoS in medianet campus networks is not to control latency or jitter (as it is in the WAN/VPN), but to manage packet loss. In GE/10GE campus networks, it takes only a few milliseconds of congestion to cause instantaneous buffer overruns resulting in packet drops. Medianet applications particularly HD video applications are extremely sensitive to packet drops, to the point where even 1 packet dropped in 10,000 is discernable by the end-user.

11 Campus QoS Design Considerations Implications of Video Compression on Packet Loss Tolerance 1920 lines of Vertical Resolution (Widescreen Aspect Ratio is 16:9) 1080 x 1920 lines = 1080 lines of Horizontal Resolution 2,073,600 pixels per frame x 3 colors per pixel x 1 Byte (8 bits) per color x 30 frames per second = 1,492,992,000 bps or 1.5 Gbps Uncompressed Cisco H.264-based HD Codecs transmit 3-5 Mbps per 1080p image which represents over 99.67% compression (300:1) Therefore packet loss is proportionally magnified in overall video quality Users can notice a single packet lost in 10,000 Making HD Video One Hundred Times More Sensitive to Packet Loss than VoIP!

12 Campus QoS Design Overview VoIP vs. HD Video At the Packet Level 1400 Voice Packets 1400 Video Frame Video Packets Video Frame Video Frame Bytes 600 Audio Samples msec Time 33 msec

13 Campus QoS Design Considerations How Long Can Queue-Buffers Accommodate Line-Rate Bursts? Gbps Linecard Example (WS-X6148A-GE-TX) Bytes Per ms Gbps Line Rate Gbps Line Rate: 1 Gbps = 125 MB/s or 125 KB/ms Total Per- Port Buffer: 5.4 MB Total Per- Queue Buffer*: 1.35 MB Total Per- Queue Buffering Capacity: 10.8 ms ms *Assuming (4) equal- sized queues

14 Campus QoS Design Considerations How Long Can Queue-Buffers Accommodate Line-Rate Bursts? 10 Gbps Linecard Example (WS=X GE) Bytes Per ms Gbps Line Rate Gbps Line Rate: 10 Gbps = 1.25 GB/s or 1.25 MB/ms Total Per- Port Buffer: 90 MB Total Per- Queue Buffer*: MB Total Per- Queue Buffering Capacity: 9.0 ms ms *Assuming (8) equal- sized queues

15 Campus QoS Design Considerations Strategic QoS Design Principles Always perform QoS in hardware rather than software when a choice exists Classify and mark applications as close to their sources as technically and administratively feasible Police unwanted traffic flows as close to their sources as possible Enable queuing policies at every node where the potential for congestion exists

16 Campus QoS Design Considerations Campus QoS Tools and Options Global Default QoS Setting Trust States and Conditional Trust Per-Port QoS, Per-VLAN QoS, Per-Port/Per-VLAN QoS Ingress QoS Models Egress QoS Models EtherChannel QoS QoS Roles in a Medianet Campus

17 Campus QoS Design Considerations Trust States and Operations CoS = 5 DSCP = 46 Untrusted no [mls] qos trust Internal DSCP = 0 Re- write CoS = 0 DSCP = 0 CoS = 5 DSCP = 46 Trust CoS [mls] qos trust cos CoS- to- DSCP Mapping Table CoS 0 à 0 CoS 4 à 32 CoS 1 à 8 CoS 5 à 40 CoS 2 à 16 CoS 6 à 48 CoS 3 à 24 CoS 7 à 56 mls qos map cos-dscp Internal DSCP = 40 Re- write CoS = 5 DSCP = 40 CoS = 5 DSCP = 46 Trust DSCP [mls] qos trust dscp Internal DSCP = 46 Re- write CoS = 5 DSCP = 46

18 Campus QoS Design Considerations Conditional Trust Operation Cisco TelePresence Example Trust Boundary 2 Successful Condi*on Met (i.e. CDP nego*a*on successful) Trust is Dynamically Extended to Cisco 7975G IP Phone 1 Cisco 7975G: Voice è CoS 5 & DSCP EF Call- Signaling è CoS 3 & DSCP CS3 3 TelePresence Primary Codec: Voice + Video è CoS 4 & DSCP CS4 Call- Signaling è CoS 3 & DSCP CS3 4 CoS- to- DSCP Map: CoS 5 è DSCP EF (46) CoS 4 è DSCP CS4 (32) CoS 3 è DSCP CS3 (24)

19 Campus QoS Design Considerations Trust Boundaries Trust Boundary Access- Edge Switches Condi*onally Trusted Endpoints Example: IP Phone + PC mls qos trust device cisco-phone Secure Endpoint Example: SoGware- protected PC With centrally- administered QoS markings mls qos trust dscp Unsecure Endpoint no mls qos trust Trust Boundary

20 Campus QoS Design Considerations Per-Port QoS vs. Per-VLAN QoS Per- Port QoS VLAN Interfaces VLAN 10 VLAN 20 Per- VLAN QoS Policy map is applied to the logical VLAN interface VLAN Interfaces VLAN 10 VLAN 20 Policy map is applied to the physical switch port Physical Ports Physical Ports

21 Campus QoS Design Considerations Per-Port/Per-VLAN QoS VLAN Interfaces DVLAN 10 VVLAN 110 DVLAN policy map is applied to the Data VLAN (only) on a given trunked switch port Trunked Physical Ports VVLAN policy map is applied to the Voice VLAN (only) on a given trunked switch port

22 Campus QoS Design Recommendations Ingress QoS Models No Trust (Untrusted) Trust CoS Trust DSCP Trust Device / Conditional Trust Marking Policies VoIP Classifier Signaling Classifier Multimedia Conferencing Classifier Signaling Classifier Transac*onal Data Classifier Bulk Data Classifier Scavenger Classifier Best Effort (Class-Default) Mark EF Mark CS3 Mark AF41 Mark CS3 Mark AF21 Mark AF11 Mark CS1 Mark DF VVLAN DVLAN (Op*onal) Policing Policies VoIP Policer (<128 kbps) Signaling Policer (<32 kbps) MM- Conf Policer (<5 Mbps) Signaling Policer (<32 kbps) Trans- Data Policer (<10 Mbps) Bulk Data Policer (<10 Mbps) Scavenger Policer (<10 Mbps) Best Effort Policer (<10 Mbps) Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Drop Drop Drop Drop Remark to CS1 Remark to CS1 Drop Remark to CS1 Ingress Queuing Policies (if required and supported)

23 Campus QoS Design Recommendations Queuing and Dropping Recommendations Catalyst Queuing is done in hardware and varies by platform/linecard and is expressed as: 1PxQyT Example: 1P3Q8T means: 1 PQ 3 non-priority queues, each with 8 drop-thresholds per queue Minimum queuing capabilities for medianet is 1P3QyT Realtime (PQ) should be less than 33% of link Best-Effort Queue should be guaranteed at 25% of link Scavenger/Bulk queue should be minimally provisioned Scavenger/Bulk 5% Enable congestion-avoidance on non-priority queues (WRED, WTD, DBL) Best Effort 25% Guaranteed BW Real*me 33%

24 Campus QoS Design Recommendations EtherChannel QoS EtherChannels are comprised of logical (Port-Channel) interfaces and physical (port-member) interfaces Sometimes EtherChannel ingress QoS policies are applied to the logical interfaces (but not always) Egress policies (such as queuing) are always applied to the physical port-member interfaces Platform QoS Policies Applied to the (Logical) Port-Channel Interface QoS Policies Applied to the (Physical) Port-Member Interfaces Catalyst 2960/3560/3750 Ingress & Egress Catalyst 4500 Ingress Egress Catalyst 6500 Ingress Egress

25 Campus QoS Design Recommendations Campus Port QoS Roles Untrusted Endpoints Untrusted Endpoint Port QoS: No Trust [Op*onal Ingress Marking and/or Policing] 1P3QyT Queuing Access Distribu*on Core Trusted Endpoint Port QoS: Trust- DSCP [Op*onal Ingress Marking and/or Policing] 1P3QyT Queuing Trusted Endpoints Condi*onally- Trusted Endpoints WAN/VPN Block Condi*onally- Trusted Endpoint Port QoS Condi*onal- Trust with Trust- CoS [Op*onal Ingress Marking and/or Policing] 1P3QyT Queuing Switch- to- Switch/Router Port QoS Trust DSCP 1P3QyT or 1P7QyT Queuing

26 Campus QoS Design Considerations At-A-Glance

27 Cisco Catalyst 2960/3560/3750 Campus QoS Design

28 Cisco Catalyst and Nexus Campus QoS Design Agenda End-to-End QoS Design Strategy Review Campus QoS Design Considerations & Recommendations Cisco Catalyst 2960/3560/3750 QoS Design Cisco Catalyst 4500 QoS Design Cisco Catalyst 6500 QoS Design Cisco Nexus 7000 QoS Design Summary and References Appendix: AutoQoS for Medianet Catalyst 3560/3750 AutoQoS Feature

29 Catalyst 2960/3560/3750 Campus QoS Design Catalyst 2960/3650/3750 Role in Campus Networks CondiXonal Trust Trust DSCP

30 Catalyst 2960/3560/3750 Campus QoS Design QoS Design Steps 1. Enable QoS 2. Configure Ingress QoS Model(s): Trust DSCP Model Conditional Trust Model Service Policy Models 3. Configure Ingress Queuing 4. Configure Egress Queuing

31 Catalyst 2960/3560/3750 Campus QoS Design Enabling QoS and Trust Model Examples Enabling QoS: mls qos Trust- DSCP Model Example: mls qos trust dscp CondiXonal- Trust Model Example: mls qos trust device cisco-phone [or] mls qos trust device cts [or] mls qos trust device ip-camera [or] mls qos trust device media-player Shaded commands are global Highlighted commands are interface specific

32 Catalyst 2960/3560/3750 Campus QoS Design Service Policy Model Example [class-maps omitted for brevity] policy-map MARKING-POLICY class VOIP set dscp ef class MULTIMEDIA-CONFERENCING set dscp af41 class SIGNALING set dscp cs3 class TRANSACTIONAL-DATA set dscp af21 class BULK-DATA set dscp af11 class SCAVENGER set dscp cs1 class DEFAULT set dscp default service-policy input MARKING-POLICY Shaded commands are global Highlighted commands are interface specific

33 Catalyst 2960/3560/3750 Campus QoS Design Ingress Queuing Model (1P1Q3T) Applica*on Network Control Internetwork Control VoIP Broadcast Video Mul*media Conferencing Real*me Interac*ve Mul*media Streaming Signaling Transac*onal Data Network Management Bulk Data Scavenger DSCP (CS7) CS6 EF CS5 AF4 CS4 AF3 CS3 AF2 CS2 AF1 CS1 EF CS5 CS4 CS7 CS6 CS3 AF4 AF3 AF2 CS2 AF1 CS1 1P1Q3T Q2 Priority Queue Queue 1 Non- Priority Default Queue Q1T3 Q1T2 Q1T1 Best Effort DF DF

34 Catalyst 2960/3560/3750 Campus QoS Design Ingress Queuing Model (1P1Q3T) Example! This section configures the ingress queues and thresholds mls qos srr-queue input priority-queue 2 bandwidth 30 mls qos srr-queue input bandwidth mls qos srr-queue input buffers mls qos srr-queue input threshold ! This section configures the ingress CoS-to-Queue mappings mls qos srr-queue input cos-map queue 1 threshold mls qos srr-queue input cos-map queue 1 threshold 2 3 mls qos srr-queue input cos-map queue 1 threshold mls qos srr-queue input cos-map queue 2 threshold 1 4 5! This section configures ingress DSCP-to-Queue Mappings mls qos srr-queue input dscp-map queue 1 threshold mls qos srr-queue input dscp-map queue 1 threshold mls qos srr-queue input dscp-map queue 1 threshold mls qos srr-queue input dscp-map queue 1 threshold 2 24 mls qos srr-queue input dscp-map queue 1 threshold mls qos srr-queue input dscp-map queue 2 threshold Shaded commands are global

35 Catalyst 2960/3560/3750 Campus QoS Design Egress Queuing Model (1P3Q3T) Applica*on Network Control Internetwork Control VoIP Broadcast Video Mul*media Conferencing Real*me Interac*ve Mul*media Streaming Signaling Transac*onal Data Network Management Bulk Data Scavenger Best Effort DSCP (CS7) CS6 EF CS5 AF4 CS4 AF3 CS3 AF2 CS2 AF1 CS1 DF AF1 CS1 DF CS7 CS6 CS3 AF4 AF3 AF2 CS2 EF CS5 CS4 1P3Q3T Queue 4 (5%) Default Queue Queue 3 (35%) Queue 2 (30%) Q1 Priority Queue Q4T2 Q4T1 Q2T3 Q2T2 Q2T1

36 Catalyst 2960/3560/3750 Campus QoS Design Egress Queuing Model (1P3Q3T) Example Part 1 of 2! This section configures egress buffers and thresholds mls qos queue-set output 1 buffers mls qos queue-set output 1 threshold mls qos queue-set output 1 threshold mls qos queue-set output 1 threshold mls qos queue-set output 1 threshold ! This section configures egress CoS-to-Queue mappings mls qos srr-queue output cos-map queue 1 threshold mls qos srr-queue output cos-map queue 2 threshold 1 2 mls qos srr-queue output cos-map queue 2 threshold 2 3 mls qos srr-queue output cos-map queue 2 threshold mls qos srr-queue output cos-map queue 3 threshold 3 0 mls qos srr-queue output cos-map queue 4 threshold 3 1 Shaded commands are global

37 Catalyst 2960/3560/3750 Campus QoS Design Egress Queuing Model (1P3Q3T) Example Part 2 of 2! This section configures egress DSCP-to-Queue mappings mls qos srr-queue output dscp-map queue 1 threshold mls qos srr-queue output dscp-map queue 2 threshold mls qos srr-queue output dscp-map queue 2 threshold mls qos srr-queue output dscp-map queue 2 threshold 2 24 mls qos srr-queue output dscp-map queue 2 threshold mls qos srr-queue output dscp-map queue 3 threshold 3 0 mls qos srr-queue output dscp-map queue 4 threshold 1 8 mls qos srr-queue output dscp-map queue 4 threshold ! This section configures interface egress queuing parameters queue-set 1 srr-queue bandwidth share priority-queue out Shaded commands are global Highlighted commands are interface specific

38 Catalyst 2960/3560/3750 Campus QoS Design EtherChannel QoS Design All QoS policies are configured on the physical port-member interfaces only Platform Catalyst 2960/3560/3750 QoS Policies Applied to the (Logical) Port-Channel Interface QoS Policies Applied to the (Physical) Port-Member Interfaces Ingress & Egress

39 Catalyst 2960/3560/3750 QoS Design At-A-Glance

40 Cisco Catalyst 4500 Supervisor 7-E Campus QoS Design

41 Cisco Catalyst and Nexus Campus QoS Design Agenda End-to-End QoS Design Strategy Review Campus QoS Design Considerations & Recommendations Cisco Catalyst 2960/3560/3750 QoS Design Cisco Catalyst 4500 QoS Design Cisco Catalyst 6500 QoS Design Cisco Nexus 7000 QoS Design Summary and References Appendix: AutoQoS for Medianet Catalyst 3560/3750 AutoQoS Feature

42 Catalyst 4500 Campus QoS Design Catalyst 4500 Role in Campus Networks CondiXonal Trust Trust DSCP

43 Catalyst 4500 Campus QoS Design QoS Design Steps 1. Configure Ingress QoS Model(s): Trust DSCP Model Conditional Trust Model Service Policy Models 2. Configure Egress Queuing

44 Catalyst 4500 Campus QoS Design Conditional Trust Model Example! This section defines the class-maps to match Voice and Signaling class-map match-all VOICE match cos 5 class-map match-all SIGNALING match cos 3! This section defines the CoS-to-DSCP remarking policy-map policy-map CISCO-IPPHONE class VOICE set dscp ef class SIGNALING set dscp cs3 class class-default! This set dscp section default applies conditional trust and the policy-map to the int(s) qos trust device cisco-phone service-policy input CISCO-IPPHONE Shaded commands are global Highlighted commands are interface specific

45 Catalyst 4500 Campus QoS Design Service Policy Model Example [class-maps omitted for brevity] policy-map MARKING-POLICY class VOIP set dscp ef class MULTIMEDIA-CONFERENCING set dscp af41 class SIGNALING set dscp cs3 class TRANSACTIONAL-DATA set dscp af21 class BULK-DATA set dscp af11 class SCAVENGER set dscp cs1 class DEFAULT service-policy set dscp default input MARKING-POLICY Shaded commands are global Highlighted commands are interface specific

46 Catalyst 4500 Campus QoS Design Egress Queuing (1P7Q1T+DBL) Model Applica*on DSCP 1P7Q1T (+DBL) Network Control (CS7) EF Internetwork Control VoIP Broadcast Video Mul*media Conferencing Real*me Interac*ve CS6 EF CS5 AF4 CS4 CS5 CS4 CS7 & CS6 CS3 & CS2 AF4 PQ Q7 (BWR 10%) Q6 (BWR 10%) Mul*media Streaming Signaling Transac*onal Data Network Management Bulk Data AF3 CS3 AF2 CS2 AF1 AF3 AF2 AF1 Q5 (BWR 10%) Q4 (BWR 10%) Q3 (BWR 4%) Scavenger CS1 CS1 Q2 (BWR 1%) Best Effort DF DF Q1 (25%) BWR = Bandwidth Remaining

47 Catalyst 4500 Campus QoS Design Egress Queuing (1P7Q1T+DBL) Example Part 1 of 2! This section configures the class-maps for the egress queuing policy class-map match-any PRIORITY-QUEUE match dscp ef cs4 cs4 class-map match-any CONTROL-MGMT-QUEUE match dscp cs7 cs6 cs3 cs2 class-map match-all MULTIMEDIA-CONFERENCING-QUEUE match dscp af41 af42 af43 class-map match-all MULTIMEDIA-STREAMING-QUEUE match dscp af31 af32 af33 class-map match-all TRANSACTIONAL-DATA-QUEUE match dscp af21 af22 af23 class-map match-all BULK-DATA-QUEUE match dscp af11 af12 af13 class-map match-all SCAVENGER-QUEUE match dscp cs1 Shaded commands are global

48 Catalyst 4500 Campus QoS Design Egress Queuing (1P7Q1T+DBL) Example Part 2 of 2! This section configures the egress queuing policy-map policy-map 1P7Q1T class PRIORITY-QUEUE priority class CONTROL-MGMT-QUEUE bandwidth remaining percent 10 class MULTIMEDIA-CONFERENCING-QUEUE bandwidth remaining percent 10 class MULTIMEDIA-STREAMING-QUEUE bandwidth remaining percent 10 class TRANSACTIONAL-DATA-QUEUE bandwidth remaining percent 10 dbl class BULK-DATA-QUEUE bandwidth remaining percent 4 dbl class SCAVENGER-QUEUE bandwidth remaining percent 1 class class-default bandwidth remaining percent 25 dbl service-policy output 1P7Q1T

49 Catalyst 4500 Campus QoS Design EtherChannel QoS Design Ingress QoS policies are configured on the logical Port-Channel interface Typically these are simply to enable DSCP trust (which requires no explicit configuration) Egress QoS policies are configured on the physical port-member interfaces Platform QoS Policies Applied to the (Logical) Port-Channel Interface QoS Policies Applied to the (Physical) Port-Member Interfaces Catalyst 4500 Ingress Egress

50 Catalyst 4500 Campus QoS Design At-A-Glance

51 Catalyst 6500 Supervisor 2T Campus QoS Design

52 Cisco Catalyst and Nexus Campus QoS Design Agenda End-to-End QoS Design Strategy Review Campus QoS Design Considerations & Recommendations Cisco Catalyst 2960/3560/3750 QoS Design Cisco Catalyst 4500 QoS Design Cisco Catalyst 6500 QoS Design Cisco Nexus 7000 QoS Design Summary and References Appendix: AutoQoS for Medianet Catalyst 3560/3750 AutoQoS Feature

53 Cisco Catalyst 6500 Campus QoS Design Catalyst 6500 Role in Campus Networks Trust DSCP

54 Cisco Catalyst 6500 Campus QoS Design QoS Design Steps Cisco Catalyst 6500 Supervisor 2T 1. Configure Ingress Queuing 2. Configure Egress Queuing

55 Cisco Catalyst 6500 Campus QoS Design Ingress Queuing (8Q4T) Model Applica*on DSCP 8Q4T Network Control Internetwork Control (CS7) CS6 EF CS5 CS4 Q8 (30%) VoIP Broadcast Video Mul*media Conferencing Real*me Interac*ve EF CS5 AF4 CS4 CS7 CS6 CS3 CS2 AF4 Q7 (10%) Q6 (10%) Mul*media Streaming Signaling AF3 CS3 AF3 Q5 (10%) Transac*onal Data AF2 AF2 Q4 (10%) Network Management Bulk Data CS2 AF1 AF1 Q3 (4%) Scavenger CS1 CS1 Q2 (1%) Best Effort DF DF Q1 (25%)

56 Cisco Catalyst 6500 Campus QoS Design Ingress Queuing (8Q4T) Example Part 1 of 2! This section configures the Ingress Queuing Class-Maps class-map type lan-queuing QUEUE-8 match dscp cs4 cs5 ef class-map type lan-queuing QUEUE-7 match dscp cs2 cs3 cs6 cs7 class-map type lan-queuing QUEUE-6 match dscp af41 af42 af43 class-map type lan-queuing QUEUE-5 match dscp af31 af32 af33 class-map type lan-queuing QUEUE-4 match dscp af21 af22 af23 class-map type lan-queuing QUEUE-3 match dscp af11 af12 af13 class-map type lan-queuing QUEUE-2 match dscp cs1 Shaded commands are global

57 Cisco Catalyst 6500 Campus QoS Design Ingress Queuing (8Q4T) Example Part 2 of 2! This section configures the Ingress Queuing Policy-Map policy-map type lan-queuing INGRESS-8Q4T class QUEUE-8 bandwidth percent 30 class QUEUE-7 bandwidth percent 10 class QUEUE-6 bandwidth percent 10 class QUEUE-5 bandwidth percent 10 class QUEUE-4 bandwidth percent 10 class QUEUE-3 bandwidth percent 4 class QUEUE-2 bandwidth percent 1 service-policy type lan-queuing input INGRESS-8Q4T Shaded commands are global Highlighted commands are interface specific

58 Cisco Catalyst 6500 Campus QoS Design Egress Queuing (1P7Q2T) Model Applica*on DSCP 1P7Q2T Network Control Internetwork Control (CS7) CS6 EF CS5 CS4 PQ VoIP Broadcast Video Mul*media Conferencing Real*me Interac*ve EF CS5 AF4 CS4 CS7 CS6 CS3 CS2 AF4 Q7 (BWR 10%) Q6 (BWR 10%) Mul*media Streaming Signaling Transac*onal Data AF3 CS3 AF2 AF3 AF2 Q5 (BWR 10%) Q4 (BWR 10%) Network Management Bulk Data CS2 AF1 AF1 Q3 (BWR 4%) Scavenger CS1 CS1 Q2 (BWR 1%) Best Effort DF DF Q1 (BWR 25%) BWR = Bandwidth Remaining

59 Cisco Catalyst 6500 Campus QoS Design Egress Queuing (1P7Q2T) Example! Ingress Queuing Class-Maps can be re-used for Egress Queuing! This section configures the Egress Queuing Policy-Map policy-map type lan-queuing EGRESS-1P7Q2T class QUEUE-8 priority class QUEUE-7 bandwidth remaining percent 10 class QUEUE-6 bandwidth remaining percent 10 class QUEUE-5 bandwidth remaining percent 10 class QUEUE-4 bandwidth remaining percent 10 class QUEUE-3 bandwidth remaining percent 4 class QUEUE-2 bandwidth remaining percent 1 service-policy type lan-queuing output EGRESS-1P7Q2T Shaded commands are global Highlighted commands 2012 are Cisco and/or interface its affiliates. All rights specific reserved.

60 Cisco Catalyst 6500 Campus QoS Design Egress Queuing (1P7Q4T DSCP- to- Queue) Example Part 3 of 3 Ingress QoS policies are configured on the logical Port-Channel interface No ingress policies typically needed for C6500-Sup2T EtherChannels (as all ports trust DSCP & CoS by default) Egress QoS policies are configured on the physical port-member interfaces Platform QoS Policies Applied to the (Logical) Port-Channel Interface QoS Policies Applied to the (Physical) Port-Member Interfaces Catalyst 6500 Ingress Egress

61 Cisco Catalyst 6500 Campus QoS Design At-A-Glance

62 Cisco Nexus 7000 Campus QoS Design

63 Cisco Catalyst and Nexus Campus QoS Design Agenda End-to-End QoS Design Strategy Review Campus QoS Design Considerations & Recommendations Cisco Catalyst 2960/3560/3750 QoS Design Cisco Catalyst 4500 QoS Design Cisco Catalyst 6500 QoS Design Cisco Nexus 7000 QoS Design Summary and References Appendix: AutoQoS for Medianet Catalyst 3560/3750 AutoQoS Feature

64 Cisco Nexus 7000 Campus QoS Design QoS Design Steps 1. Configure Ingress Queuing 2. Configure Egress Queuing

65 Cisco Nexus 7000 Campus QoS Design M1 10GE (8Q4T) Ingress Queuing Model Example Applica*on Class CoS 8Q4T OAM / VM Control CoS 7 CoS 5 Q1 BW:5% Network Control CoS 6 CoS 7 Q2 BW:5% Voice CoS 5 CoS 6 Q3 BW:5% Video CoS 4 CoS 4 Q4 BW:15% FCOE / Signaling CoS 3 CoS 3 Q5 BW:15% Transac*onal Data CoS 2 CoS 2 Q6 BW:15% Bulk Data CoS 1 CoS 1 Q7 BW:15% Best Effort CoS 0 CoS 0 Q- Default BW:25%

66 Cisco Nexus 7000 Campus QoS Design M1 10GE (8Q4T) Ingress Queuing Model Configuration Example Part 1 of 2 class-map type queuing match-any 8q2t-in-q1 match cos 5 class-map type queuing match-any 8q2t-in-q2 match cos 7 class-map type queuing match-any 8q2t-in-q3 match cos 6 class-map type queuing match-any 8q2t-in-q4 match cos 4 class-map type queuing match-any 8q2t-in-q5 match cos 3 class-map type queuing match-any 8q2t-in-q6 match cos 2 class-map type queuing match-any 8q2t-in-q7 match cos 1 class-map type queuing match-any 8q2t-in-q-default match cos 0 Shaded commands are global

67 Cisco Nexus 7000 Campus QoS Design M1 10GE (8Q4T) Ingress Queuing Model Configuration Example Part 2 of 2 policy-map type queuing 8Q4T-INGRESS class type queuing 8q2t-in-q1 bandwidth percent 5 class type queuing 8q2t-in-q2 bandwidth percent 5 class type queuing 8q2t-in-q3 bandwidth percent 5 class type queuing 8q2t-in-q4 bandwidth percent 15 class type queuing 8q2t-in-q5 bandwidth percent 15 class type queuing 8q2t-in-q6 bandwidth percent 15 class type queuing 8q2t-in-q7 bandwidth percent 15 class type queuing 8q2t-in-q-default bandwidth percent 25 service-policy type queuing input 8Q4T-INGRESS

68 Cisco Nexus 7000 Campus QoS Design M1 10GE (1P7Q4T) Egress Queuing Model Example Applica*on Class CoS 1P7Q4T OAM / VM Control CoS 7 CoS 5 PQ1 QL:5% Network Control CoS 6 CoS 7 Q2 QL:5% / BWR:5% Voice CoS 5 CoS 6 Q3 QL:5% / BWR:5% Video CoS 4 CoS 4 Q4 QL:15% BWR:15% WRED FCOE / Signaling CoS 3 CoS 3 Q5 QL:15% BWR:15% Transac*onal Data CoS 2 CoS 2 Q6 QL:15% BWR:15% WRED Bulk Data CoS 1 CoS 1 Q7 QL:15% BWR:15% WRED Best Effort CoS 0 CoS 0 Q- Default QL:15% BWR:30% WRED

69 Cisco Nexus 7000 Campus QoS Design M1 10GE (1P7Q4T) Egress Queuing Model Configuration Example Part 1 of 3 class-map type queuing match-any 1p7q4t-out-pq1 match cos 5 class-map type queuing match-any 1p7q4t-out-q2 match cos 7 class-map type queuing match-any 1p7q4t-out-q3 match cos 6 class-map type queuing match-any 1p7q4t-out-q4 match cos 4 class-map type queuing match-any 1p7q4t-out-q5 match cos 3 class-map type queuing match-any 1p7q4t-out-q6 match cos 2 class-map type queuing match-any 1p7q4t-out-q7 match cos 1 class-map type queuing match-any 1p7q4t-out-q-default match cos 0 Shaded commands are global

70 Cisco Nexus 7000 Campus QoS Design M1 10GE (1P7Q4T) Egress Queuing Model Configuration Example Part 2 of 3 policy-map type queuing 1P7Q4T-EGRESS class type queuing 1p7q4t-out-pq1 priority queue-limit percent 5 class type queuing 1p7q4t-out-q2 queue-limit percent 5 bandwidth remaining percent 5 class type queuing 1p7q4t-out-q3 queue-limit percent 5 bandwidth remaining percent 5 class type queuing 1p7q4t-out-q4 queue-limit percent 15 bandwidth remaining percent 15 random-detect cos-based random-detect cos 4 minimum-threshold percent 80 maximum-threshold percent 100 [policy-map continued on following slide] Shaded commands are global

71 Cisco Nexus 7000 Campus QoS Design M1 10GE (1P7Q4T) Egress Queuing Model Configuration Example Part 3 of 3 [policy-map continued] class type queuing 1p7q4t-out-q5 queue-limit percent 15 bandwidth remaining percent 15 class type queuing 1p7q4t-out-q6 queue-limit percent 15 bandwidth remaining percent 15 random-detect cos-based random-detect cos 2 minimum-threshold percent 80 maximum-threshold percent 100 class type queuing 1p7q4t-out-q7 queue-limit percent 15 bandwidth remaining percent 15 random-detect cos-based random-detect cos 1 minimum-threshold percent 80 maximum-threshold percent 100 class type queuing 1p7q4t-out-q-default queue-limit percent 25 bandwidth remaining percent 30 random-detect cos-based random-detect cos 1 minimum-threshold percent 80 maximum-threshold percent 100 service-policy type queuing output 1P7Q4T-EGRESS

72 Summary and References

73 Cisco Catalyst and Nexus Campus QoS Design Agenda End-to-End QoS Design Strategy Review Campus QoS Design Considerations & Recommendations Cisco Catalyst 2960/3560/3750 QoS Design Cisco Catalyst 4500 QoS Design Cisco Catalyst 6500 QoS Design Cisco Nexus 7000 QoS Design Summary and References Appendix: AutoQoS for Medianet Catalyst 3560/3750 AutoQoS Feature

74 Summary Key Takeaways The explosion of rich media applications requires network architects to reevaluate current QoS designs RFC 4594 provides an industry best-practice QoS strategy Campus QoS is needed primarily to control packet drops Some rich media applications require fewer than 1 drop per 10,000 packets QoS architects need to know how trust-states, Port-based QoS, VLAN-based QoS and EtherChannel QoS can impact designs Hardware queuing (both ingress and egress) vary by platform & linecard Cisco provides many At-A-Glance guides to get up and running quickly As well as comprehensive in-depth design chapters for additional design reference AutoQoS for Medianet Feature is available on Catalyst 2960/3560/3750 and Catalyst 4500

75 Campus QoS Design 4.0 At-A-Glance Quick Start Guides QoS Design Strategy At-A-Glance Campus QoS Design At-A-Glance Cisco Catalyst 3560/3750 QoS Design At-A-Glance Cisco Catalyst 4500 QoS Design At-A-Glance Cisco Catalyst 6500 QoS Design At-A-Glance

76 Campus QoS Design 4.0 At-A-Glance Comprehensive Design Chapters Enterprise Quality of Service Design WAN_and_MAN/QoS_SRND_40/QoSIntro_40.html Campus QoS Design WAN_and_MAN/QoS_SRND_40/QoSCampus_40.html

77 Appendix: AutoQoS for Medianet Catalyst 2960/3560/3750 Feature

78 Cisco Catalyst and Nexus Campus QoS Design Agenda End-to-End QoS Design Strategy Review Campus QoS Design Considerations & Recommendations Cisco Catalyst 2960/3560/3750 QoS Design Cisco Catalyst 4500 QoS Design Cisco Catalyst 6500 QoS Design Cisco Nexus 7000 QoS Design Summary and References Appendix: AutoQoS for Medianet Catalyst 3560/3750 AutoQoS Feature

79 Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 Models auto qos voip [ cisco- phone cisco- sogphone trust ] auto qos trust { cos dscp } auto qos classify Mul*media Conferencing Classifier Signaling Classifier Transac*onal Data Classifier Bulk Data Classifier Scavenger Classifier Best Effort (Class- Default) auto qos video [ cts ip- camera ] Mark AF41 Mark CS3 Mark AF21 Mark AF11 Mark CS1 Mark DF auto qos classify { police } MM- Conf Policer (<5 Mbps) Signaling Policer (<32 kbps) Trans- Data Policer (<10 Mbps) Bulk Data Policer (<10 Mbps) Scavenger Policer (<10 Mbps) Best Effort Policer (<10 Mbps) Yes No Yes No Yes No Yes No Yes No Yes No Drop Drop Remark to CS1 Remark to CS1 Drop Remark to CS1 1P1Q3T Ingress Queuing Policies 1P3Q3T Egress Queuing Policies

80 Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 auto qos trust { cos dscp } Layer 2 Switch Port Example: C3750(config-if)#auto qos trust interface GigabitEthernet1/0/1 description L2-ACCESS-PORT switchport access vlan 10 switchport voice vlan 110 mls qos trust cos! AutoQoS has configured the port to static CoS-trust auto qos trust spanning-tree portfast Layer 3 Routed Interface Example: C3750(config-if)#auto qos trust interface GigabitEthernet1/0/48 description L3-ROUTED-INTERFACE no switchport ip address mls qos trust dscp! AutoQoS has configured the port to static DSCP-trust auto qos trust

81 Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 auto qos video [ cts ip-camera ] C3750(config-if)#auto qos video cts interface GigabitEthernet1/0/1 description L2-ACCESS-PORT-TO-CTS switchport access vlan 10 switchport voice vlan 110 mls qos trust device cts! AutoQoS has configured a conditional-trust policy for cts devices mls qos trust cos! AutoQoS has configured CoS-trust to be dynamically extended auto qos video cts C3750(config-if)#auto qos video ip-camera interface GigabitEthernet1/0/1 description L2-ACCESS-PORT-TO-IPVS-CAMERA switchport access vlan 10 switchport voice vlan 110 mls qos trust device ip-camera! AutoQoS has configured a conditional-trust policy for ip-camera devices mls qos trust dscp! AutoQoS has configured DSCP-trust to be dynamically extended auto qos video ip-camera

82 Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 auto qos classify C3750(config-if)#auto qos classify! This section defines the policy-map for AutoQoS-Classify policy-map AUTOQOS-SRND4-CLASSIFY-POLICY class AUTOQOS_MULTIENHANCED_CONF_CLASS set dscp af41! Marks Multimedia Conferencing traffic to AF41 class AUTOQOS_BULK_DATA_CLASS set dscp af11! Marks Bulk Data traffic to AF11 class AUTOQOS_TRANSACTION_CLASS set dscp af21! Marks Transactional Data traffic to AF21 class AUTOQOS_SCAVANGER_CLASS set dscp cs1! Marks Scavenger traffic to CS1 class AUTOQOS_SIGNALING_CLASS set dscp cs3! Marks Signaling traffic to CS3 class AUTOQOS_DEFAULT_CLASS set dscp default! An explicit default class marks Best Effort traffic to DF Class- maps and IP ACLs omired for brevity

83 Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 auto qos classify police C3750(config-if)#auto qos classify police policy-map AUTOQOS-SRND4-CLASSIFY-POLICE-POLICY class AUTOQOS_MULTIENHANCED_CONF_CLASS set dscp af41 police exceed-action drop! Multimedia-conferencing is marked AF41 and policed to drop at 5 Mbps class AUTOQOS_BULK_DATA_CLASS set dscp af11 police exceed-action policed-dscp-transmit! Bulk-data is marked AF11 and policed to remark (to CS1) at 10 Mbps class AUTOQOS_TRANSACTION_CLASS set dscp af21 police exceed-action policed-dscp-transmit! Transactional data is marked AF21 and policed to remark (to CS1) at 10 Mbps class AUTOQOS_SCAVANGER_CLASS set dscp cs1 police exceed-action drop! Scavenger traffic is marked CS1 and policed to drop at 10 Mbps class AUTOQOS_SIGNALING_CLASS set dscp cs3 police exceed-action drop! Signaling is marked CS3 and policed to drop at 32 kbps class AUTOQOS_DEFAULT_CLASS set dscp default police exceed-action policed-dscp-transmit! An explicit default class marks all other IP traffic to DF! and polices all other IP traffic to remark (to CS1) at 10 Mbps Class- maps and IP ACLs omired for brevity

84 Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS VoIP (SRND4) Models auto qos voip trust auto qos voip cisco- phone VoIP Classifier Mark EF VoIP Policer (<128 kbps) Signaling Classifier Mark CS3 Signaling Policer (<32 kbps) Best Effort (Class- Default) Mark DF Best Effort Policer (<10 Mbps) auto qos voip cisco- sogphone VoIP Classifier Signaling Classifier Mul*media Conferencing Classifier Signaling Classifier Transac*onal Data Classifier Bulk Data Classifier Scavenger Classifier Best Effort (Class- Default) Mark EF Mark CS3 Mark AF41 Mark CS3 Mark AF21 Mark AF11 Mark CS1 Mark DF VoIP Policer (<128 kbps) Signaling Policer (<32 kbps) MM- Conf Policer (<5 Mbps) Signaling Policer (<32 kbps) Trans- Data Policer (<10 Mbps) Bulk Data Policer (<10 Mbps) Scavenger Policer (<10 Mbps) Best Effort Policer (<10 Mbps) Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Remark to CS1 Remark to CS1 Remark to CS1 Remark to CS1 Remark to CS1 Drop Drop Remark to CS1 Remark to CS1 Drop Remark to CS1 1P1Q3T Ingress Queuing Policies 1P3Q3T Egress Queuing Policies

85 Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 auto qos voip cisco-phone C3750(config-if)#auto qos voip cisco-phone Class- maps omired for brevity! This section defines the AutoQoS-VoIP-Cisco-Phone (SRND4) Policy-Map policy-map AUTOQOS-SRND4-CISCOPHONE-POLICY class AUTOQOS_VOIP_DATA_CLASS set dscp ef police exceed-action policed-dscp-transmit! Voice is marked to DSCP EF and policed (to remark) if exceeding 128 kbps class AUTOQOS_VOIP_SIGNAL_CLASS set dscp cs3 police exceed-action policed-dscp-transmit! Signaling is marked to DSCP CS3 and policed (to remark) if exceeding 32 kbps class AUTOQOS_DEFAULT_CLASS set dscp default police exceed-action policed-dscp-transmit! An explicit default class marks all other IP traffic to DF! and polices all other IP traffic to remark (to CS1) at 10 Mbps!

86 Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 auto qos voip cisco-softphone policy-map AUTOQOS-SRND4-SOFTPHONE-POLICY class AUTOQOS_VOIP_DATA_CLASS set dscp ef police exceed-action policed-dscp-transmit! Voice is marked to DSCP EF and policed (to remark) if exceeding 128 kbps class AUTOQOS_VOIP_SIGNAL_CLASS set dscp cs3 police exceed-action policed-dscp-transmit! Signaling is marked to DSCP CS3 and policed (to remark) if exceeding 32 kbps class AUTOQOS_MULTIENHANCED_CONF_CLASS set dscp af41 police exceed-action drop! MM-Conf is marked to DSCP AF41 and policed (to drop) if exceeding 5 Mbps class AUTOQOS_BULK_DATA_CLASS set dscp af11 police exceed-action policed-dscp-transmit! Bulk Data is marked to DSCP AF11 and policed (to remark) if exceeding 10 Mbps class AUTOQOS_TRANSACTION_CLASS set dscp af21 police exceed-action policed-dscp-transmit! Trans-Data is marked to DSCP AF21 and policed (to remark) if exceeding 10 Mbps class AUTOQOS_SCAVANGER_CLASS set dscp cs1 police exceed-action drop! Scavenger is marked to DSCP CS1 and policed (to drop) if exceeding 10 Mbps class AUTOQOS_SIGNALING_CLASS set dscp cs3 police exceed-action drop! Signaling is marked to DSCP CS3 and policed (to drop) if exceeding 32 kbps class AUTOQOS_DEFAULT_CLASS set dscp default! An explicit default class 2012 marks Cisco and/or all its other affiliates. All IP rights traffic reserved. to DF Class- maps and IP ACLs omired for brevity

87 Cisco Catalyst 2960/3560/3750 AutoQoS Ingress Queuing Model (1P1Q3T) Applica*on DSCP 1P1Q3T Network Control Internetwork Control VoIP Broadcast Video (CS7) CS6 EF CS5 EF CS5 CS4 CS7 CS6 Q2 Priority Queue Q1T3 Mul*media Conferencing AF4 CS3 Q1T2 Real*me Interac*ve Mul*media Streaming CS4 AF3 AF4 AF3 Q1T1 Signaling Transac*onal Data CS3 AF2 AF2 Queue 1 Non- Priority Default Queue Network Management CS2 CS2 Bulk Data AF1 AF1 Scavenger CS1 CS1 Best Effort DF DF

88 Cisco Catalyst 2960/3560/3750 AutoQoS Ingress Queuing Model (1P1Q3T) Example! This section configures the ingress queues and thresholds mls qos srr-queue input priority-queue 2 bandwidth 30 mls qos srr-queue input bandwidth mls qos srr-queue input buffers mls qos srr-queue input threshold ! This section configures the ingress CoS-to-Queue mappings mls qos srr-queue input cos-map queue 1 threshold mls qos srr-queue input cos-map queue 1 threshold 2 3 mls qos srr-queue input cos-map queue 1 threshold mls qos srr-queue input cos-map queue 2 threshold 1 4 5! This section configures ingress DSCP-to-Queue Mappings mls qos srr-queue input dscp-map queue 1 threshold mls qos srr-queue input dscp-map queue 1 threshold mls qos srr-queue input dscp-map queue 1 threshold mls qos srr-queue input dscp-map queue 1 threshold 2 24 mls qos srr-queue input dscp-map queue 1 threshold mls qos srr-queue input dscp-map queue 2 threshold Shaded commands are global

89 Cisco Catalyst 2960/3560/3750 AutoQoS Egress Queuing Model (1P3Q3T) Applica*on Network Control Internetwork Control VoIP Broadcast Video Mul*media Conferencing Real*me Interac*ve Mul*media Streaming Signaling Transac*onal Data Network Management Bulk Data Scavenger Best Effort DSCP (CS7) CS6 EF CS5 AF4 CS4 AF3 CS3 AF2 CS2 AF1 CS1 DF CS1 AF1 DF CS7 CS6 CS3 AF4 AF3 AF2 CS2 EF CS5 CS4 1P3Q3T Queue 4 (5%) Default Queue Queue 3 (35%) Queue 2 (30%) Q1 Priority Queue Q4T2 Q4T1 Q2T3 Q2T2 Q2T1

90 Cisco Catalyst 2960/3560/3750 AutoQoS Egress Queuing Model (1P3Q3T) Example Part 1 of 2! This section configures egress buffers and thresholds C3750-X(config)# mls qos queue-set output 1 buffers C3750-X(config)# mls qos queue-set output 1 threshold C3750-X(config)# mls qos queue-set output 1 threshold C3750-X(config)# mls qos queue-set output 1 threshold C3750-X(config)# mls qos queue-set output 1 threshold ! This section configures egress CoS-to-Queue mappings C3750-E(config)#mls qos srr-queue output cos-map queue 1 threshold C3750-E(config)#mls qos srr-queue output cos-map queue 2 threshold 1 2 C3750-E(config)#mls qos srr-queue output cos-map queue 2 threshold 2 3 C3750-E(config)#mls qos srr-queue output cos-map queue 2 threshold C3750-E(config)#mls qos srr-queue output cos-map queue 3 threshold 3 0 C3750-E(config)#mls qos srr-queue output cos-map queue 4 threshold 3 1 Shaded commands are global

91 Cisco Catalyst 2960/3560/3750 AutoQoS Egress Queuing Model (1P3Q3T) Example Part 2 of 2! This section configures egress DSCP-to-Queue mappings mls qos srr-queue output dscp-map queue 1 threshold mls qos srr-queue output dscp-map queue 2 threshold mls qos srr-queue output dscp-map queue 2 threshold mls qos srr-queue output dscp-map queue 2 threshold 2 24 mls qos srr-queue output dscp-map queue 2 threshold mls qos srr-queue output dscp-map queue 3 threshold 3 0 mls qos srr-queue output dscp-map queue 4 threshold 1 8 mls qos srr-queue output dscp-map queue 4 threshold ! This section configures interface egress queuing parameters queue-set 1 srr-queue bandwidth share priority-queue out Shaded commands are global Highlighted commands are interface specific

92 Cisco Catalyst 2960/3560/3750 AutoQoS At-A-Glance

93 Thank You.

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