Cisco Catalyst and Nexus Campus QoS...

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Cisco Catalyst and Nexus Campus QoS Design BRKCRS-2501

1


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


QoS Design Strategy Review

  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

Trends In Internet Usage

http://www.cisco.com/en/US/solutions/collateral/ns341/ns525/ns537/ns705/ns827/white_paper_c11-481360_ns827_Networking_Solutions_White_Paper.html


QoS Design Strategy Trends in Voice, Video and Data Media Applications

Data

Connec*vity

Web Email

Messaging

Convergence

Leveraging Investment

Data Apps

•  App Sharing •  Web/Internet •  Messaging •  Email

Voice

•  IP Telephony

Video

•  IP Video Conf

Media Explosion

Co-‐Existence

Data Apps

•  App Sharing •  Web/Internet •  Messaging •  Email

Voice

•  IP Telephony •  HD Audio •  SoGphone •  Other VoIP

Video

•  IP Video Conf •  Surveillance •  Video Telephony •  HD Video Conf •  VoD Streaming

Unmanaged

•  Internet Streaming •  Internet VoIP •  YouTube •  MySpace •  Other

Collabora*ve Media

Experience Assurance

Ad-‐Hoc App

TelePresence

WebEx


QoS Design Strategy Review RFC 4594-Based Strategic QoS Recommendations

Application Class

Per-Hop Behavior

Admission Control

Queuing & Dropping

Application 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 E-mail, FTP, Backup Apps, Content Distribution

Best Effort DF Default Queue + RED Default Class

Scavenger CS1 Min BW Queue (Deferential) YouTube, iTunes, BitTorent, Xbox Live


QoS Design Strategy Review Business Requirements Will Evolve and Expand over Time

Time

Cri*cal Data

Real*me

4-‐Class Model

Best Effort

Signaling / Control Call Signaling

Cri*cal Data

Interac*ve Video

Voice

8-‐Class Model

Scavenger

Best Effort

Streaming Video

Network Control

Network Management

Real*me Interac*ve

Transac*onal Data

Mul*media Conferencing

Voice

12-‐Class Model

Bulk Data

Scavenger

Best Effort

Mul*media Streaming

Network Control

Broadcast Video

Call Signaling


http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/qosmrn.pdf

QoS Design Strategy At-A-Glance


Campus QoS Design Considerations & Recommendations


Campus QoS Design Considerations

  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.

The Case for Campus QoS


1080

line

s of

Hor

izon

tal

Res

olut

ion

1920 lines of Vertical Resolution (Widescreen Aspect Ratio is 16:9) 1080 x 1920 lines =

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!

Campus QoS Design Considerations Implications of Video Compression on Packet Loss Tolerance


20 msec

Voice Packets

Bytes

200

600

1000

Audio Samples

1400

Time

200

600

1000

1400

33 msec

Video Packets Video Frame

Video Frame

Video Frame

Campus QoS Design Overview VoIP vs. HD Video—At the Packet Level


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er m

s

Gbps Line Rate

Campus QoS Design Considerations How Long Can Queue-Buffers Accommodate Line-Rate Bursts? Gbps Linecard Example (WS-X6148A-GE-TX)

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

*Assuming (4) equal-‐sized queues

ms


Bytes P

er m

s

10 Gbps Line Rate

Campus QoS Design Considerations How Long Can Queue-Buffers Accommodate Line-Rate Bursts? 10 Gbps Linecard Example (WS=X6716-10GE)

Gbps Line Rate: 10 Gbps = 1.25 GB/s or 1.25 MB/ms Total Per-‐Port Buffer: 90 MB Total Per-‐Queue Buffer*: 11.25 MB Total Per-‐Queue Buffering Capacity: 9.0 ms

*Assuming (8) equal-‐sized queues

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  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

Strategic QoS Design Principles



  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

Campus QoS Tools and Options


Campus QoS Design Considerations Trust States and Operations

CoS = 5

DSCP = 46

CoS = 5

DSCP = 46

Trust CoS [mls] qos trust cos

CoS = 5

DSCP = 46 Trust DSCP [mls] qos trust dscp

Untrusted no [mls] qos trust

Internal DSCP = 0 Re-‐write

CoS = 0

DSCP = 0


CoS = 5

DSCP = 40


CoS = 5

DSCP = 46

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 0 8 16 24 32 40 48 56


Campus QoS Design Considerations Conditional Trust Operation Cisco TelePresence Example

3 TelePresence Primary Codec: Voice + Video è CoS 4 & DSCP CS4

Call-‐Signaling è CoS 3 & DSCP CS3

CoS-‐to-‐DSCP Map: CoS 5 è DSCP EF (46) CoS 4 è DSCP CS4 (32) CoS 3 è DSCP CS3 (24)

4

Trust Boundary

Trust is Dynamically Extended to Cisco 7975G IP Phone

Successful “Condi*on” Met (i.e. CDP nego*a*on successful)

1

Cisco 7975G: Voice è CoS 5 & DSCP EF Call-‐Signaling è CoS 3 & DSCP CS3

2


Campus QoS Design Considerations Trust Boundaries

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 B

ound

ary

Trust B

ound

ary


Campus QoS Design Considerations Per-Port QoS vs. Per-VLAN QoS

Policy map is applied to the physical switch port

VLAN 10 VLAN 20

Physical Ports

VLAN Interfaces

Policy map is applied to the logical VLAN interface

Per-‐Port QoS Per-‐VLAN QoS

VLAN 10 VLAN 20

Physical Ports

VLAN Interfaces


DVLAN 10

DVLAN policy map is applied to the Data VLAN (only)

on a given trunked switch port

VVLAN 110

Trunked Physical Ports

VLAN Interfaces

VVLAN policy map is applied to the Voice VLAN (only)

on a given trunked switch port

Campus QoS Design Considerations Per-Port/Per-VLAN QoS


Campus QoS Design Recommendations Ingress QoS Models

Trust CoS

Trust Device / Conditional Trust

No Trust (Untrusted)

Ingr

ess

Que

uing

Pol

icie

s (if re

quire

d an

d supp

orted)

(Op*onal) Policing Policies

VoIP Policer (<128 kbps)

Signaling Policer (<32 kbps)

MM-‐Conf Policer (<5 Mbps)


Trans-‐Data Policer (<10 Mbps)

Bulk Data Policer (<10 Mbps)

Best Effort Policer (<10 Mbps)

Scavenger Policer (<10 Mbps)

Drop

Drop

Remark to CS1

Remark to CS1

Remark to CS1

Drop

Drop

Drop

Yes No

Yes No

Yes No

Yes No

Yes No

Yes No

Yes No

Yes No

Marking Policies

VoIP Classifier

Signaling Classifier

Multimedia Conferencing 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

DVLAN

VVLAN

Trust DSCP


  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

  Enable congestion-avoidance on non-priority queues (WRED, WTD, DBL)

Campus QoS Design Recommendations Queuing and Dropping Recommendations

Real*me ≤ 33%

Guaranteed BW

Scavenger/Bulk ≤ 5%

Best Effort ≥ 25%


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



Campus QoS Design Recommendations Campus Port QoS Roles

Core Distribu*on Access

Untrusted Endpoints

Trusted Endpoints

Condi*onally-‐ Trusted Endpoints

Switch-‐to-‐Switch/Router Port QoS •  Trust DSCP •  1P3QyT or 1P7QyT Queuing

WAN/VPN Block

Untrusted Endpoint Port QoS: •  No Trust •  [Op*onal Ingress Marking and/or Policing] •  1P3QyT Queuing

Trusted Endpoint Port QoS: •  Trust-‐DSCP •  [Op*onal Ingress Marking and/or Policing] •  1P3QyT Queuing

Condi*onally-‐Trusted Endpoint Port QoS •  Condi*onal-‐Trust with Trust-‐CoS •  [Op*onal Ingress Marking and/or Policing] •  1P3QyT Queuing


http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/qoscampusaag.pdf

Campus QoS Design Considerations At-A-Glance


Cisco Catalyst 2960/3560/3750 Campus QoS Design


Catalyst 2960/3560/3750 Campus QoS Design Catalyst 2960/3650/3750 Role in Campus Networks

CondiXonal Trust Trust DSCP


Catalyst 2960/3560/3750 Campus QoS Design

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

QoS Design Steps


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

Catalyst 2960/3560/3750 Campus QoS Design Enabling QoS and Trust Model Examples

mls qos

Enabling QoS:

mls qos trust dscp Trust-‐DSCP Model Example:

CondiXonal-‐Trust Model Example:

Shaded commands are global

Highlighted commands are interface specific


[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

Catalyst 2960/3560/3750 Campus QoS Design Service Policy Model Example



service-policy input MARKING-POLICY


Catalyst 2960/3560/3750 Campus QoS Design Ingress Queuing Model (1P1Q3T)

1P1Q3T

Q2 Priority Queue

CS6

CS7

EF

CS4

Queue 1 Non-‐Priority Default Queue

Network Management

Signaling

Real*me Interac*ve

Transac*onal Data


Bulk Data

AF2

CS3

CS4

AF4

CS2

AF1

Scavenger CS1

Best Effort DF

Mul*media Streaming AF3

Broadcast Video

VoIP

Applica*on

CS5

EF

Internetwork Control CS6

DSCP

Network Control (CS7) CS5

Q1T3

Q1T2

Q1T1

CS3

CS2

CS6

CS7

DF

AF1

CS1

AF4

AF3

AF2


! This section configures the ingress queues and thresholds mls qos srr-queue input priority-queue 2 bandwidth 30 mls qos srr-queue input bandwidth 70 30 mls qos srr-queue input buffers 90 10 mls qos srr-queue input threshold 1 80 90 ! This section configures the ingress CoS-to-Queue mappings mls qos srr-queue input cos-map queue 1 threshold 1 0 1 2 mls qos srr-queue input cos-map queue 1 threshold 2 3 mls qos srr-queue input cos-map queue 1 threshold 3 6 7 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 1 0 8 10 12 14 mls qos srr-queue input dscp-map queue 1 threshold 1 16 18 20 22 mls qos srr-queue input dscp-map queue 1 threshold 1 26 28 30 34 36 38 mls qos srr-queue input dscp-map queue 1 threshold 2 24 mls qos srr-queue input dscp-map queue 1 threshold 3 48 56 mls qos srr-queue input dscp-map queue 2 threshold 3 32 40 46

Catalyst 2960/3560/3750 Campus QoS Design Ingress Queuing Model (1P1Q3T) Example



Catalyst 2960/3560/3750 Campus QoS Design Egress Queuing Model (1P3Q3T)

Network Management

Signaling

Real*me Interac*ve

Transac*onal Data


Bulk Data

AF2

CS3

CS4

AF4

CS2

AF1

Scavenger CS1

Best Effort DF


Broadcast Video

VoIP

Applica*on

CS5

EF


DSCP

Network Control (CS7)

Q1 Priority Queue

Queue 4 (5%)

Queue 2 (30%)

Default Queue Queue 3 (35%)

Q2T3

Q2T2

Q4T2 Q4T1

Q2T1

CS6

CS7

EF

CS4

CS3

CS2

DF

CS1

AF1

AF4

AF3

AF2

1P3Q3T

CS5


! This section configures egress buffers and thresholds mls qos queue-set output 1 buffers 15 30 35 20 mls qos queue-set output 1 threshold 1 100 100 100 100 mls qos queue-set output 1 threshold 2 80 90 100 400 mls qos queue-set output 1 threshold 3 100 100 100 400 mls qos queue-set output 1 threshold 4 60 100 100 400 ! This section configures egress CoS-to-Queue mappings mls qos srr-queue output cos-map queue 1 threshold 3 4 5 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 3 6 7 mls qos srr-queue output cos-map queue 3 threshold 3 0 mls qos srr-queue output cos-map queue 4 threshold 3 1

Catalyst 2960/3560/3750 Campus QoS Design Egress Queuing Model (1P3Q3T) Example–Part 1 of 2



! This section configures egress DSCP-to-Queue mappings mls qos srr-queue output dscp-map queue 1 threshold 3 32 40 46 mls qos srr-queue output dscp-map queue 2 threshold 1 16 18 20 22 mls qos srr-queue output dscp-map queue 2 threshold 1 26 28 30 34 36 38 mls qos srr-queue output dscp-map queue 2 threshold 2 24 mls qos srr-queue output dscp-map queue 2 threshold 3 48 56 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 2 10 12 14

! This section configures interface egress queuing parameters queue-set 1 srr-queue bandwidth share 1 30 35 5 priority-queue out



Catalyst 2960/3560/3750 Campus QoS Design Egress Queuing Model (1P3Q3T) Example–Part 2 of 2


  All QoS policies are configured on the physical port-member interfaces only

Catalyst 2960/3560/3750 Campus QoS Design EtherChannel QoS Design

Platform QoS Policies Applied to the (Logical) Port-Channel

Interface


Interfaces

Catalyst 2960/3560/3750 •  Ingress & Egress


http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/qoscampuscat3xxxaag.pdf

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


Cisco Catalyst 4500—Supervisor 7-E Campus QoS Design


Catalyst 4500 Campus QoS Design Catalyst 4500 Role in Campus Networks

CondiXonal Trust Trust DSCP


Catalyst 4500 Campus QoS Design

1. Configure Ingress QoS Model(s):   Trust DSCP Model   Conditional Trust Model   Service Policy Models

2. Configure Egress Queuing

QoS Design Steps


! This section applies conditional trust and the policy-map to the int(s) qos trust device cisco-phone service-policy input CISCO-IPPHONE

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 set dscp default


[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

Catalyst 4500 Campus QoS Design Service Policy Model Example



service-policy input MARKING-POLICY


Catalyst 4500 Campus QoS Design Egress Queuing (1P7Q1T+DBL) Model

Network Management

Signaling

Real*me Interac*ve

Transac*onal Data


Bulk Data

AF2

CS3

CS4

AF4

CS2

AF1

Scavenger CS1

Best Effort DF


Broadcast Video

VoIP

Applica*on

CS5

EF


DSCP


1P7Q1T (+DBL)

PQ

EF

CS5

CS4

Q7 (BWR 10%)

CS7 & CS6

CS3 & CS2

Q6 (BWR 10%)

Q5 (BWR 10%)

Q4 (BWR 10%)

Q3 (BWR 4%)

Q2 (BWR 1%)

Q1 (25%) DF

AF1

CS1

AF2

AF3

AF4

BWR = Bandwidth Remaining


! 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

Catalyst 4500 Campus QoS Design Egress Queuing (1P7Q1T+DBL) Example—Part 1 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

Catalyst 4500 Campus QoS Design Egress Queuing (1P7Q1T+DBL) Example—Part 2 of 2


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


Interface


Interfaces



http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/qoscampuscat4500aag.html

Catalyst 4500 Campus QoS Design At-A-Glance


Catalyst 6500—Supervisor 2T Campus QoS Design


Cisco Catalyst 6500 Campus QoS Design Catalyst 6500 Role in Campus Networks

Trust DSCP


Cisco Catalyst 6500 Campus QoS Design


QoS Design Steps—Cisco Catalyst 6500 Supervisor 2T


Cisco Catalyst 6500 Campus QoS Design Ingress Queuing (8Q4T) Model

Network Management

Signaling

Real*me Interac*ve

Transac*onal Data


Bulk Data

AF2

CS3

CS4

AF4

CS2

AF1

Scavenger CS1

Best Effort DF


Broadcast Video

VoIP

Applica*on

CS5

EF


DSCP


8Q4T

Q8 (30%) EF CS5

Q7 (10%)

Q6 (10%)

Q5 (10%)

Q4 (10%)

Q3 (4%)

Q2 (1%)

Q1 (25%) DF

AF1

CS1

AF2

AF3

AF4

CS7 CS6 CS3 CS2

CS4


! 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

Cisco Catalyst 6500 Campus QoS Design Ingress Queuing (8Q4T) Example—Part 1 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

Cisco Catalyst 6500 Campus QoS Design Ingress Queuing (8Q4T) Example—Part 2 of 2



service-policy type lan-queuing input INGRESS-8Q4T


Cisco Catalyst 6500 Campus QoS Design Egress Queuing (1P7Q2T) Model

Network Management

Signaling

Real*me Interac*ve

Transac*onal Data


Bulk Data

AF2

CS3

CS4

AF4

CS2

AF1

Scavenger CS1

Best Effort DF


Broadcast Video

VoIP

Applica*on

CS5

EF


DSCP


1P7Q2T

PQ EF CS5

Q7 (BWR 10%)

Q6 (BWR 10%)

Q5 (BWR 10%)

Q4 (BWR 10%)

Q3 (BWR 4%)

Q2 (BWR 1%)

Q1 (BWR 25%) DF

AF1

CS1

AF2

AF3

AF4

CS7 CS6 CS3 CS2

CS4

BWR = Bandwidth Remaining


! 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

Cisco Catalyst 6500 Campus QoS Design Egress Queuing (1P7Q2T) Example



service-policy type lan-queuing output EGRESS-1P7Q2T


  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

Cisco Catalyst 6500 Campus QoS Design Egress Queuing (1P7Q4T DSCP-‐to-‐Queue) Example—Part 3 of 3


Interface


Interfaces



http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/qoscampuscat6500aag.pdf

Cisco Catalyst 6500 Campus QoS Design At-A-Glance


Cisco Nexus 7000 Campus QoS Design


Cisco Nexus 7000 Campus QoS Design


QoS Design Steps


Cisco Nexus 7000 Campus QoS Design M1 10GE (8Q4T) Ingress Queuing Model Example

FCOE / Signaling

Transac*onal Data

Video

Bulk Data

Best Effort

Voice

Applica*on Class

Network Control

OAM / VM Control

CoS 3

CoS 2

CoS 4

CoS 1

CoS 0

CoS 5

CoS

CoS 6

CoS 7

Q5 BW:15%

Q6 BW:15%

Q4 BW:15%

Q7 BW:15%

Q-‐Default BW:25%

Q3 BW:5%

8Q4T

Q2 BW:5%

Q1 BW:5%

CoS 5

CoS 7

CoS 6

CoS 4

CoS 3

CoS 1

CoS 2

CoS 0


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



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


Cisco Nexus 7000 Campus QoS Design M1 10GE (1P7Q4T) Egress Queuing Model Example

FCOE / Signaling

Transac*onal Data

Video

Bulk Data

Best Effort

Voice

Applica*on Class

Network Control

OAM / VM Control

CoS 3

CoS 2

CoS 4

CoS 1

CoS 0

CoS 5

CoS

CoS 6

CoS 7

Q5 QL:15% BWR:15%

Q6 QL:15% BWR:15% WRED



Q-‐Default QL:15% BWR:30% WRED

Q3 QL:5% / BWR:5%

1P7Q4T

Q2 QL:5% / BWR:5%

PQ1 QL:5%

CoS 5

CoS 7

CoS 6

CoS 4

CoS 3

CoS 1

CoS 2

CoS 0


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



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]



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


Summary and References


Summary

  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

Key Takeaways


Campus QoS Design 4.0—At-A-Glance Quick Start Guides   QoS Design Strategy At-A-Glance

http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/qosmrn.pdf

  Campus QoS Design At-A-Glance http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/qoscampusaag.html

  Cisco Catalyst 3560/3750 QoS Design At-A-Glance http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/qoscampuscat3xxxaag.html

  Cisco Catalyst 4500 QoS Design At-A-Glance http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/qoscampuscat4500aag.html

  Cisco Catalyst 6500 QoS Design At-A-Glance http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/qoscampuscat6500aag.html


  Enterprise Quality of Service Design 4.0 http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSIntro_40.html

  Campus QoS Design 4.0 http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSCampus_40.html

Campus QoS Design 4.0—At-A-Glance Comprehensive Design Chapters


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


auto qos video [ cts | ip-‐camera ]

1P3Q

3T Egress Q

ueuing Policies

auto qos classify { police } MM-‐Conf Policer (<5 Mbps)






Remark to CS1

Remark to CS1

Remark to CS1

Drop

Drop

Drop

Yes No

Yes No

Yes No

Yes No

Yes No

Yes No

1P1Q

3T In

gress Q

ueuing Policies

auto qos voip [ cisco-‐phone | cisco-‐soGphone | trust ]

auto qos trust { cos | dscp }

http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSCampus_40.html#wp1144082

auto qos classify Mul*media Conferencing Classifier





Best Effort (Class-‐Default)

Mark AF41

Mark CS3

Mark AF21

Mark AF11

Mark CS1

Mark DF

Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 Models


Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 – auto qos trust { cos | dscp }

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 2 Switch Port Example: C3750(config-if)#auto qos trust

Layer 3 Routed Interface Example: C3750(config-if)#auto qos trust interface GigabitEthernet1/0/48 description L3-ROUTED-INTERFACE no switchport ip address 10.0.1.103 255.255.255.0 … mls qos trust dscp ! AutoQoS has configured the port to static DSCP-trust auto qos trust



Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 – auto qos video [ cts | ip-camera ]

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 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



Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 – 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

C3750(config-if)#auto qos classify Class-‐maps and IP ACLs omired for brevity



Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 – auto qos classify police

policy-map AUTOQOS-SRND4-CLASSIFY-POLICE-POLICY class AUTOQOS_MULTIENHANCED_CONF_CLASS set dscp af41 police 5000000 8000 exceed-action drop ! Multimedia-conferencing is marked AF41 and policed to drop at 5 Mbps class AUTOQOS_BULK_DATA_CLASS set dscp af11 police 10000000 8000 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 10000000 8000 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 10000000 8000 exceed-action drop ! Scavenger traffic is marked CS1 and policed to drop at 10 Mbps class AUTOQOS_SIGNALING_CLASS set dscp cs3 police 32000 8000 exceed-action drop ! Signaling is marked CS3 and policed to drop at 32 kbps class AUTOQOS_DEFAULT_CLASS set dscp default police 10000000 8000 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

C3750(config-if)#auto qos classify police Class-‐maps and IP ACLs omired for brevity


auto qos voip trust

1P3Q

3T Egress Q

ueuing Policies

1P1Q

3T In

gress Q

ueuing Policies

auto qos voip cisco-‐phone VoIP Classifier


Mark EF

Mark CS3



Remark to CS1

Remark to CS1

Yes No

Yes No

Best Effort (Class-‐Default) Mark DF Best Effort Policer (<10 Mbps) Remark to CS1

Yes No

auto qos voip cisco-‐soGphone VoIP Classifier


Mul*media Conferencing Classifier





Best Effort (Class-‐Default)

Mark EF

Mark CS3

Mark AF41

Mark CS3

Mark AF21

Mark AF11

Mark CS1

Mark DF



MM-‐Conf Policer (<5 Mbps)






Remark to CS1

Remark to CS1

Remark to CS1

Remark to CS1

Remark to CS1

Drop

Drop

Drop

Yes No

Yes No

Yes No

Yes No

Yes No

Yes No

Yes No

Yes No

Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS VoIP (SRND4) Models


Cisco Catalyst 2960/3560/3750 AutoQoS AutoQoS SRND4 – auto qos voip cisco-phone

! 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 128000 8000 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 32000 8000 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 10000000 8000 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 !

C3750(config-if)#auto qos voip cisco-phone


Class-‐maps omired for brevity


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 128000 8000 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 32000 8000 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 5000000 8000 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 10000000 8000 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 10000000 8000 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 10000000 8000 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 32000 8000 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 marks all other IP traffic to DF

Class-‐maps and IP ACLs omired for brevity


Cisco Catalyst 2960/3560/3750 AutoQoS Ingress Queuing Model (1P1Q3T)

1P1Q3T

Q2 Priority Queue

CS6 CS7

EF

CS4

Queue 1 Non-‐Priority Default Queue

Network Management

Signaling

Real*me Interac*ve

Transac*onal Data


Bulk Data

AF2

CS3

CS4

AF4

CS2

AF1

Scavenger CS1

Best Effort DF


Broadcast Video

VoIP

Applica*on

CS5

EF


DSCP

Network Control (CS7) CS5

Q1T3

Q1T2

Q1T1

CS3

CS2

CS6 CS7

DF

AF1

CS1

AF4

AF3

AF2


! This section configures the ingress queues and thresholds mls qos srr-queue input priority-queue 2 bandwidth 30 mls qos srr-queue input bandwidth 70 30 mls qos srr-queue input buffers 90 10 mls qos srr-queue input threshold 1 80 90 ! This section configures the ingress CoS-to-Queue mappings mls qos srr-queue input cos-map queue 1 threshold 1 0 1 2 mls qos srr-queue input cos-map queue 1 threshold 2 3 mls qos srr-queue input cos-map queue 1 threshold 3 6 7 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 1 0 8 10 12 14 mls qos srr-queue input dscp-map queue 1 threshold 1 16 18 20 22 mls qos srr-queue input dscp-map queue 1 threshold 1 26 28 30 34 36 38 mls qos srr-queue input dscp-map queue 1 threshold 2 24 mls qos srr-queue input dscp-map queue 1 threshold 3 48 56 mls qos srr-queue input dscp-map queue 2 threshold 3 32 40 46

Cisco Catalyst 2960/3560/3750 AutoQoS Ingress Queuing Model (1P1Q3T) Example



Cisco Catalyst 2960/3560/3750 AutoQoS Egress Queuing Model (1P3Q3T)

Network Management

Signaling

Real*me Interac*ve

Transac*onal Data


Bulk Data

AF2

CS3

CS4

AF4

CS2

AF1

Scavenger CS1

Best Effort DF


Broadcast Video

VoIP

Applica*on

CS5

EF


DSCP


Q1 Priority Queue

Queue 4 (5%)

Queue 2 (30%)

Default Queue Queue 3 (35%)

Q2T3

Q2T2

Q4T2 Q4T1

Q2T1

CS6

CS7

EF

CS4

CS3

CS2

DF

AF1

CS1

AF4

AF3

AF2

1P3Q3T

CS5


! This section configures egress buffers and thresholds C3750-X(config)# mls qos queue-set output 1 buffers 15 30 35 20 C3750-X(config)# mls qos queue-set output 1 threshold 1 100 100 100 100 C3750-X(config)# mls qos queue-set output 1 threshold 2 80 90 100 400 C3750-X(config)# mls qos queue-set output 1 threshold 3 100 100 100 400 C3750-X(config)# mls qos queue-set output 1 threshold 4 60 100 100 400 ! This section configures egress CoS-to-Queue mappings C3750-E(config)#mls qos srr-queue output cos-map queue 1 threshold 3 4 5 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 3 6 7 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

Cisco Catalyst 2960/3560/3750 AutoQoS Egress Queuing Model (1P3Q3T) Example–Part 1 of 2



! This section configures egress DSCP-to-Queue mappings mls qos srr-queue output dscp-map queue 1 threshold 3 32 40 46 mls qos srr-queue output dscp-map queue 2 threshold 1 16 18 20 22 mls qos srr-queue output dscp-map queue 2 threshold 1 26 28 30 34 36 38 mls qos srr-queue output dscp-map queue 2 threshold 2 24 mls qos srr-queue output dscp-map queue 2 threshold 3 48 56 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 2 10 12 14

! This section configures interface egress queuing parameters queue-set 1 srr-queue bandwidth share 1 30 35 5 priority-queue out

Cisco Catalyst 2960/3560/3750 AutoQoS Egress Queuing Model (1P3Q3T) Example–Part 2 of 2

Shaded commands are global Highlighted commands are interface specific


http://www.cisco.com/en/US/docs/solutions/Enterprise/Video/autoqosmediacampus.pdf

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


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