Release 15.1SY Supervisor Engine 2T Software Configuration Guide
PFC QoS Policy Based Queueing
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Table of Contents

Policy-Based Queueing

Prerequisites for Policy-Based Queueing

Restrictions for Policy-Based Queueing

Information About Policy-Based Queueing

Port-Based Queue Types

Ingress and Egress Buffers and Queues

Ingress Queue Types

Egress Queue Types

Module to Queue Type Mappings

Queueing Policies

How to Configure Policy-Based Queueing

Configuring a Queueing Policy Class Map

Verifying a Queueing Policy Class Map

Configuring Queueing Policy Maps

Verifying a Queueing Policy Map

Attaching a Queueing Policy Map to an Interface

Configuration Examples for Policy-Based Queueing

Queueing Policy Sample Configuration

Queueing Policy Commands Supported by Each Queue Type

1q2t, 1q8t Ingress Queue Supported Commands

2q8t Ingress Queue Supported Commands

8q4t Ingress Queue Supported Commands

8q8t Ingress Queue Supported Commands

1p1q4t Ingress Queue Supported Commands

1p1q8t Ingress Queue Supported Commands

1p7q2t Ingress Queue Supported Commands

1p3q8t Egress Queue Supported Commands

1p7q8t Egress Queue Supported Commands

1p7q4t, 2p6q4t Ingress or Egress Queue Supported Commands

WS-X6904-40G-2T 1p7q4t, 2p6q4t Egress Queue Supported Commands

Queueing Policy Commands Sample Configurations for Each Queue Type

1q2t Ingress Queue Sample Configuration

1q8t Ingress Queue Sample Configuration

2q8t Ingress Queue Sample Configuration

8q4t, 8q8t Ingress Queue Sample Configuration (CoS-Based Queueing)

8q4t Ingress Queue Sample Configuration (DSCP-Based Queueing)

1p1q4t Ingress Queue Sample Configuration

1p1q8t Ingress Queue Sample Configuration

1p3q8t Egress Queue Sample Configuration

1p7q8t Egress Queue Sample Configuration

1p7q4t Ingress or Egress Queue Sample Configuration (CoS-Based Queueing)

1p7q4t Ingress or Egress Queue Sample Configuration (DSCP-Based Queueing)

Policy-Based Queueing


Note • Queueing is optional. Use the commands described in this section to configure queueing on ports that serve congested links.

  • For complete syntax and usage information for the commands used in this chapter, see these publications:

http://www.cisco.com/en/US/products/ps11846/prod_command_reference_list.html

  • Cisco IOS Release 15.1SY supports only Ethernet interfaces. Cisco IOS Release 15.1SY does not support any WAN features or commands.


 


Tip For additional information about Cisco Catalyst 6500 Series Switches (including configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_support_series_home.html

Participate in the Technical Documentation Ideas forum


 

Prerequisites for Policy-Based Queueing

None.

Restrictions for Policy-Based Queueing

  • Ports on the WS-X6904-40G-2T switching modules can be configured with two priority queues (2p6q4t). Priority queue 1 has higher priority than priority queue 2.
  • The WS-X6904-40G-2T egress queues support QoS shaping.

Shaping buffers traffic that exceeds the total egress port bandwidth. You can configure shaping on the egress queues and for egress traffic on the port.

You configure shaping as a percentage of the total egress port bandwidth.

Shaping can be configured only on the egress queues of WS-X6904-40G-2T ports. You cannot configure shaping on a port-channel interface.

Ports with shaping configured can be members of an EtherChannel, but shaping can cause the egress traffic rate to vary significantly and cause significant differences between the member ports.

You configure shaping with the shape average percent command. The show running-configuration command displays the shape average percent command, but the show policy-map type lan-queuing command displays the shaping configuration with the cir percentage command under the heading “Average Rate Traffic Shaping” heading.

See the “Configuring Policy-Based Queueing on WS-X6904-40G-2T Ports” section.

  • DSCP-based queueing is supported on 8q4t, 1p7q2t, 2p6q4t, and 1p7q4t ports. The Supervisor Engine 2T-10GE ports are 8q4t/1p7q4t with the platform qos 10g-only global configuration command configured, which disables the Gigabit Ethernet ports on the supervisor engine.
  • The presence of a match dscp command or a match precedence command in a class map that is used in a queueing policy attached to a port enables DSCP-based queueing on the port in the direction that the queueing policy is attached.
  • CoS-based queueing is always used for non-IP traffic, IP multicast traffic, and IP unknown unicast flood traffic.
  • Class maps that are used in queueing policies can contain any combination and number of match dscp , match precedence , or match cos commands.
  • You can attach one input and one output queueing policy to an interface, in addition to policies that configure marking or policing. To support per-queue shaping on WS-X6904-40G-2T egress nonprioritynonpriority queues, the output queueing policy on WS-X6904-40G-2T port egress queues supports child policies.
  • To support migration from Cisco IOS Release 12.2SX configurations, Cisco IOS Release 15.1SY supports global configuration mode and interface configuration mode queueing commands.

When you attach an ingress or egress queueing policy to a port, all interface configuration mode queueing commands on the port are deleted.

An attached ingress or egress queueing policy supercedes the effect of any configured global configuration mode queueing commands.

If you attach a queueing policy in only one direction, the queueing configuration of the other direction is either the defaults or is defined by any configured global configuration mode queueing commands.

You cannot configure any interface configuration mode queueing commands on a port that has a queueing policy attached.

  • Policy-based queueing is supported on all modules that Cisco IOS Release 15.1SY supports with the Supervisor Engine 2T-10GE.
  • Queueing policies are specific to particular port types because a queueing policy cannot contain any commands that are not supported by the port to which it will be attached (see the “Configuration Examples for Policy-Based Queueing” section). Commands not supported on a port are not ignored. You cannot successfully apply a policy with unsupported commands to a port.
  • For clarity, configure queueing policy names that correspond to the port type it supports; for example 1q2t_1q8t_ingress .
  • Queueing policies can contain multiple class maps; each class map configures a queue.
  • A policy-map class defined by a class command that uses a class map and that contains the policy-map class priority command configures the priority queue. (The priority queue is the highest-numbered queue.) The class-map filters the QoS values (CoS or DSCP) it is configured with to the priority queue.
  • Enabling SRR on a port disables the priority queue.
  • A policy-map class defined by a class command that uses a class map and that does not contain the policy-map class priority command configures the highest-numbered nonpriority queue. (If the port has a priority queue, the highest-numbered nonpriority queue is numbered one less than the priority queue. If the port does not have a priority queue, the highest-numbered queue is a nonpriority queue.) Subsequent such commands define the configuration of the remaining nonpriority queues in reverse numerical order. You cannot skip a queue, but configuration of all queues is not required. The class-map filters the QoS values it is configured with to the nonpriority queue being configured.
  • A class command that uses the class-default keywords configures queue 1. The class-default keywords filter all remaining QoS values to queue 1.
  • For each nonpriority queue, policy-map class queue-buffers or random-detect commands assign QoS values (CoS or DSCP) to thresholds within a queue. Thresholds are configured in numerical order. You cannot skip a threshold, but configuration of all threshold is not required. QoS values that are to be applied to the thresholds must be from the group of values that the class-map filters to the queue.

The first queue-buffers or random-detect command assigns QoS values to the first threshold, and configures the percentage value applied to it.

Subsequent queue-buffers or random-detect commands that are configured with the same percentage value assign additional QoS values to the first threshold.

The next queue-buffers or random-detect command that is configured with a different percentage value assigns QoS values to the numerically next threshold, and configures the percentage value applied to it.

Subsequent queue-buffers or random-detect commands that are configured with the same percentage value assign additional QoS values to the numerically next threshold.

Each queue-buffers or random-detect command with a different percentage defines the next unconfigured threshold and any subsequent commands that repeat a percentage value assign additional QoS values to a configured threshold.

All unconfigured thresholds are at 100%.

All unassigned QoS labels are assigned to the highest-numbered threshold.

Information About Policy-Based Queueing

Ingress and Egress Buffers and Queues


Note The WS-X6904-40G-2T egress queues support QoS shaping.


The Ethernet port ASICs have buffers that are divided into a fixed number of queues. When congestion avoidance is enabled, PFC QoS uses the traffic’s Layer 2 CoS value or, on some port types, the Layer 3 DSCP values, to assign traffic to the queues. The buffers and queues store frames temporarily as they transit the switch. PFC QoS allocates the port ASIC memory as buffers for each queue on each port.

The Ethernet ports support the following types of queues:

  • Nonpriority queues
  • Priority queues

The Ethernet ports support the following types of scheduling algorithms between queues:

  • Shaped round robin (SRR)—SRR allows a queue to use only the allocated bandwidth.
  • Deficit weighted round robin (DWRR)—DWRR keeps track of any lower-priority queue under-transmission caused by traffic in a higher-priority queue and compensates in the next round.
  • Weighted Round Robin (WRR)—WRR does not explicitly reserve bandwidth for the queues. Instead, the amount of bandwidth assigned to each queue is user configurable. The percentage or weight allocated to a queue defines the amount of bandwidth allocated to the queue.
  • Priority queueing—Strict priority queueing allows delay-sensitive data such as voice to be dequeued and sent before packets in other queues are dequeued, giving delay-sensitive data preferential treatment over other traffic. The switch services traffic in the strict-priority transmit queue before servicing the nonpriority queues. After transmitting a packet from a nonpriority queue, the switch checks for traffic in the strict-priority queue. If the switch detects traffic in the strict-priority queue, it suspends its service of the nonpriority queue and completes service of all traffic in the strict-priority queue before returning to the nonpriority queue.

The Ethernet ports provide congestion avoidance with these types of thresholds within a queue:

  • Weighted Random Early Detection (WRED)—On ports with WRED drop thresholds, frames with a given QoS label are admitted to the queue based on a random probability designed to avoid buffer congestion. The probability of a frame with a given QoS label being admitted to the queue or discarded depends on the weight and threshold assigned to that QoS label.

For example, if CoS 2 is assigned to queue 1, threshold 2, and the threshold 2 levels are 40 percent (low) and 80 percent (high), then frames with CoS 2 will not be dropped until queue 1 is at least 40 percent full. As the queue depth approaches 80 percent, frames with CoS 2 have an increasingly higher probability of being discarded rather than being admitted to the queue. Once the queue is over 80 percent full, all CoS 2 frames are dropped until the queue is less than 80 percent full. The frames the switch discards when the queue level is between the low and high thresholds are picked out at random, rather than on a per-flow basis or in a FIFO manner. This method works well with protocols such as TCP that can adjust to periodic packet drops by backing off and adjusting their transmission window size.

  • Tail-drop thresholds—On ports with tail-drop thresholds, frames with a given QoS label are admitted to the queue until the drop threshold associated with that QoS label is exceeded; subsequent frames of that QoS label are discarded until the threshold is no longer exceeded. For example, if CoS 1 is assigned to queue 1, threshold 2, and the threshold 2 watermark is 60 percent, then frames with CoS 1 will not be dropped until queue 1 is 60 percent full. All subsequent CoS 1 frames will be dropped until the queue is less than 60 percent full. With some port types, you can configure the nonpriority receive queue to use both a tail-drop and a WRED-drop threshold by mapping a CoS value to the queue or to the queue and a threshold. The switch uses the tail-drop threshold for traffic carrying CoS values mapped only to the queue. The switch uses WRED-drop thresholds for traffic carrying CoS values mapped to the queue and a threshold. All LAN ports of the same type use the same drop-threshold configuration.

Note • You can enable DSCP-based queues and thresholds on 8q4t, 1p7q2t, and 1p7q4t ports (see the “Module to Queue Type Mappings” section), either in a queueing policy or with legacy interface commands (see the “Legacy Configuration Procedures for DSCP-Based Queue Mapping” section).

  • DSCP-based queueing is supported on 8q4t, 1p7q2t, and 1p7q4t ports. The Supervisor Engine 2T-10GE ports are 8q4t/1p7q4t with the platform qos 10g-only global configuration command configured. To configure DSCP-based queue mapping on Supervisor Engine 2T ports, you must enter shutdown interface configuration mode commands for the Supervisor Engine 2T Gigabit Ethernet ports, and then enter the platform qos 10g-only global configuration command, which disables the Gigabit Ethernet ports on the Supervisor Engine 2T.


 

The switch provides congestion avoidance with the combination of multiple queues and the scheduling algorithms associated with each queue.

Ingress Queue Types

To see the queue structure of a LAN port, enter the show queueing interface type slot/port | include type command. The command displays one of the following architectures:

  • 1q2t indicates one nonpriority queue with one configurable tail-drop threshold and one nonconfigurable tail-drop threshold.
  • 2q4t indicates two nonpriority queues, each with four configurable tail-drop thresholds.
  • 2q8t indicates two nonpriority queues, each with eight configurable tail-drop thresholds.
  • 8q4t indicates eight nonpriority queues, each with four thresholds, each configurable as either WRED-drop or tail-drop, with support for DSCP-based queueing.
  • 8q8t indicates eight nonpriority queues, each with eight thresholds, each configurable as either WRED-drop or tail-drop.
  • 1p1q4t indicates:

One strict-priority queue

One nonpriority queue with four configurable tail-drop thresholds.

  • 1p7q2t indicates the following:

One strict-priority queue

Seven nonpriority queues, each with two thresholds, each threshold configurable as either WRED-drop or tail-drop

Supports DSCP-based queueing

  • 2p6q4t indicates the following:

Two strict-priority queues

Six nonpriority queues, each with four thresholds, each threshold configurable as either WRED-drop or tail-drop

Supports DSCP-based queueing

  • 1p7q4t indicates the following:

One strict-priority queue

Seven nonpriority queues, each with four thresholds, each threshold configurable as either WRED-drop or tail-drop

Supports DSCP-based queueing

Egress Queue Types

To see the queue structure of an egress LAN port, enter the show queueing interface type slot/port | include type command. The command displays one of the following architectures:

  • 1p3q8t indicates the following:

One strict-priority queue

Three nonpriority queues, each with eight thresholds, each threshold configurable as either WRED-drop or tail-drop

  • 2p6q4t indicates the following:

Two strict-priority queues

Six nonpriority queues, each with four thresholds, each threshold configurable as either WRED-drop or tail-drop

Supports DSCP-based queueing

  • 1p7q4t indicates the following:

One strict-priority queue

Seven nonpriority queues, each with four thresholds, each threshold configurable as either WRED-drop or tail-drop

Supports DSCP-based queueing

  • 1p7q8t indicates the following:

One strict-priority queue

Seven nonpriority queues, each with eight thresholds, each threshold configurable as either WRED-drop or tail-drop

Module to Queue Type Mappings

 

Table 35-1 Supervisor Engine Module QoS Queue Structures

Supervisor Engines
Ingress
Queue and
Drop
Thresholds
Ingress
Queue
Scheduler
Egress
Queue and
Drop
Thresholds
Egress
Queue
Scheduler
Total
Buffer
Size
Ingress
Buffer
Size
Egress
Buffer
Size

VS-S2T-10G-XL, VS-S2T-10G

With Gigabit Ethernet ports enabled

2q4t

WRR

1p3q4t

DWRR or SRR

128 MB

112 MB

Does not support DSCP-based queueing.

With Gigabit Ethernet ports disabled

8q4t

WRR

1p7q4t

DWRR or SRR

  • Supports DSCP-based queueing.

 

Table 35-2 40-Gigabit Ethernet Modules

Modules
Ingress
Queue and
Drop
Thresholds
Ingress
Queue
Scheduler
Egress
Queue and
Drop
Thresholds
Egress
Queue
Scheduler
Total
Buffer
Size
Ingress
Buffer
Size
Egress
Buffer
Size

WS-X6904-40G-2TXL, WS-X6904-40G-2T
(supports DSCP-based queueing; supports egress queue shaping )

1p7q4t or 2p6q4t

DWRR

1p7q4t or 2p6q4t

DWRR

See the Catalyst 6900 Series data sheet.

Note On WS-X6904-40G-2T ports, the bandwidth command must be configured if you configure any nondefault values for any other queueing commands on the port. (CSCtz05347)

 

Table 35-3 10-Gigabit Ethernet Modules

Modules
Ingress
Queue and
Drop
Thresholds
Ingress
Queue
Scheduler
Egress
Queue and
Drop
Thresholds
Egress
Queue
Scheduler
Total
Buffer Size
Ingress
Buffer Size
Egress
Buffer Size

WS-X6908-10GE
(supports DSCP-based queueing)

8q4t

DWRR

1p7q4t

DWRR
SRR

200 MB

108 MB

90 MB

WS-X6816-10T-2T, WS-X6716-10T, WS-X6816-10G-2T, WS-X6716-10GE (supports DSCP-based queueing)

Performance mode

8q4t

DWRR

1p7q4t

DWRR
SRR

198 MB

108 MB per port

90 MB per port

Oversubscription mode

1p7q2t

DWRR

1p7q4t

DWRR
SRR

91 MB

90 MB per port

1 MB per port group

WS-X6704-10GE

8q8t

WRR

1p7q8t

DWRR

16 MB

2 MB

14 MB

 

Table 35-4 Gigabit and 10/100/1000 Ethernet Modules

Modules
Ingress Queue and Drop Thresholds
Ingress Queue Scheduler
Egress Queue and Drop Thresholds
Egress Queue Scheduler
Total Buffer Size
Ingress Buffer Size
Egress Buffer Size

WS-X6848-TX-2T , WS-X6748-GE-TX , WS-X6848-SFP-2T, WS-X6748-SFP, WS-X6824-SFP-2T, WS-X6724-SFP

 

2q8t

WRR

1p3q8t

DWRR

1.3 MB

166 KB

1.2 MB

Queueing Policies

Queueing policies use class-maps with match commands (see Table 35-5 ) and policy maps with scheduling and congestion management commands (see Table 35-6 ).

 

Table 35-5 Queueing Policy Class Map match Commands and Match Criteria

match Commands
Match Criteria

match cos cos_list

CoS values.

match dscp dscp_list

DSCP values.

match precedence precedence_list

Precedence values.

Note

  • The presence of a match dscp command or a match precedence command in a class map that is used in a queueing policy attached to a port configures DSCP-based queueing in the direction of the policy (ingress or egress) on that port.
  • CoS-based queueing is always used for non-IP traffic, IP multicast traffic, and IP unknown unicast flood traffic.
  • Class maps that are used in queueing policies can contain both match dscp commands and match cos commands.

 

Table 35-6 Queueing Policy-Map Class Commands

Queueing Commands
Description

bandwidth [remaining] percent percentage

Allocates bandwidth between nonpriority queues. The remaining keyword is required on ports that have a priority queue.

shape average percent percentage

On WS-X6904-40G-2T ports, configures shaping on egress priority queues.

Enables SRR on other ports, which allocates limited bandwidth between nonpriority egress queues (see “SRR” in the “Module to Queue Type Mappings” section).

priority

Applies a policy-map class to a priority queue.

priority level {1|2} [percent percentage ]

(Required to configure multiple priority queues or shaping.) On WS-X6904-40G-2T ports, applies a policy-map class to one of the priority queues. Priority queue 1 has higher priority than priority queue 2.

The optional percent percentage keyword and argument configure shaping on egress priority queues.

queue-buffers ratio weight

Sets the queue size.

queue-limit multiple-type-based

Enables application of CoS, precedence, and DSCP values to a tail-drop threshold.

queue-limit cos cos_value percent percent_of_qsize

Applies one CoS value to a tail-drop threshold and configures the threshold percentage.

queue-limit dscp dscp_value percent percent_of_qsize

Applies one DSCP value to a tail-drop threshold and configures the threshold percentage.

queue-limit precedence precedence_value percent percent_of_qsize

Applies one precedence value to a tail-drop threshold and configures the threshold percentage.

queue-limit cos values cos_list percent percent_of_qsize

Applies multiple CoS values to a tail-drop threshold and configures the threshold percentage.

queue-limit dscp values dscp_list percent percent_of_qsize

Applies multiple DSCP values to a tail-drop threshold and configures the threshold percentage.

queue-limit precedence values precedence_list percent percent_of_qsize

Applies multiple precedence values to a tail-drop threshold and configures the threshold percentage.

random-detect cos-based [aggregate]

Enables application of CoS values to a WRED-drop threshold. The aggregate keyword enables use of the values keyword.

random-detect dscp-based [aggregate]

Enables application of DSCP values to a WRED-drop threshold. The aggregate keyword enables use of the values keyword.

random-detect precedence-based [aggregate]

Enables application of precedence values to a WRED-drop threshold. The aggregate keyword enables use of the values keyword.

random-detect multiple-type-based [aggregate]

Enables application of CoS, precedence, and DSCP values to a WRED-drop threshold. The aggregate keyword enables use of the values keyword.

random-detect cos cos_value percent min_percent max_percent

Applies one CoS value to a WRED-drop threshold and configures the threshold percentages.

random-detect dscp dscp_value percent min_percent max_percent

Applies one DSCP value to a WRED-drop threshold and configures the threshold percentages.

random-detect precedence precedence_value percent min_percent max_percent

Applies one DSCP value to a WRED-drop threshold and configures the threshold percentages.

random-detect cos values cos_list percent min_percent max_percent

Applies multiple CoS values to a WRED-drop threshold and configures the threshold percentages; requires the aggregate keyword.

random-detect dscp values dscp_list percent min_percent max_percent

Applies multiple DSCP values to a WRED-drop threshold and configures the threshold percentages; requires the aggregate keyword.

random-detect precedence values precedence_list percent min_percent max_percent

Applies multiple precedence values to a WRED-drop threshold and configures the threshold percentages.

How to Configure Policy-Based Queueing


Note See the “Configuration Examples for Policy-Based Queueing” section for detailed information about which queueing commands are supported by each queue type.


Configuring a Queueing Policy Class Map

To configure a queueing policy class map, perform this task:

 

Command
Purpose

Step 1

Router(config)# class-map type lan-queuing match-any class_name

Creates a class map. Create a class map for the thresholds on each type of queue that you are configuring. Give the class map a name that allows you to easily associate it with the queue type and threshold for which you configure it.

Step 2

Router (config-cmap)# match cos cos_value1 [ cos_value2 ... [ cos_valueN ]]

(Optional) Configures the queueing policy class map to filter based on CoS values. You can enter multiple commands.

Step 3

Router (config-cmap)# match dscp dscp_value1 [ dscp_value2 ... [ dscp_valueN ]]

(Optional) Configures the queueing policy class map to filter based on DSCP values and enables DSCP-based queueing on the port in the direction that the queueing policy is attached. You can enter multiple commands.

Step 4

Router (config-cmap)# match precedence precedence_value1 [ precedence_value2 ... [ precedence_valueN ]]

(Optional) Configures the queueing policy class map to filter based on precedence values and enables DSCP-based queueing on the port in the direction that the queueing policy is attached. You can enter multiple commands.

Step 5

Router (config-cmap)# end

Exits configuration mode.

This example shows how to create a class map named cos5 and how to configure filtering to match traffic with CoS 5:

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# class-map cos5
Router(config-cmap)# match cos 5
Router(config-cmap)# end

Verifying a Queueing Policy Class Map

To verify the queueing policy class map, perform this task:

 

Command
Purpose

Router# show class-map class_name

Verifies the configuration.

Configuring Queueing Policy Maps


Note • You can attach one input queueing policy map and one output queueing policy map to an interface.

  • Queueing policy maps contain one policy-map class for each queue.
  • Each policy-map class configures a queue.


 

Configuring Policy-Based Queueing on WS-X6904-40G-2T Ports


Note Use the procedures in these sections to configure the WS-X6904-40G-2T nonpriority ingress queues and single priority queues (ingress or egress) without shaping:

Configure thresholds as described in the “Configuring Thresholds” section.


 

Configuring WS-X6904-40G-2T Nonpriority Egress Queue Shaping (Except class-default)

The first class class_map_name command that you enter configures the highest numbered nonpriority queue. Subsequent class class_map_name commands configure the remaining nonpriority queues in reverse numerical order (highest-numbered to queue #2). To configure shaping on a nonpriority egress queue, perform this task:

 

Command
Purpose

Step 1

Router(config)# policy-map type lan-queuing child_policy_name

Creates a child policy map for the nonpriority queues.

Step 2

Router(config-pmap)# class class_map_name

Creates a policy map class for a nonpriority egress queue numbered greater than one.

Step 3

Router(config-pmap-c)# bandwidth remaining percent percentage

Allocates DWRR bandwidth.

Step 4

Router(config-pmap-c)# shape average percent percentage

Configures shaping.

Step 5

Router(config-pmap-c)# queue-buffers ratio weight

(Optional) Sets queue buffer size.

Step 6

Router(config-pmap-c)# end

(Optional) Exits policy map class configuration mode.

Configuring WS-X6904-40G-2T Multiple Priority Queues or Egress Priority-Queue Shaping

To enable the WS-X6904-40G-2T 2p6q4t port architecture (two priority queues) or to configure egress priority-queue shaping, perform this task:

 

Command
Purpose

Step 1

Router(config-pmap)# class class_map_name

Creates a policy map class.

Step 2

Router(config-pmap-c)# priority level { 1 | 2 } [ percent percentage ]

Applies the class map to one of the priority queues. Priority queue 1 has higher priority than priority queue 2.

Optionally, for egress queues, configures shaping .

Step 3

Router(config-pmap-c)# queue-buffers ratio weight

(Optional) Sets queue buffer size.

Step 4

Router(config-pmap-c)# end

(Optional) Exits policy map class configuration mode.

Configuring WS-X6904-40G-2T Class-Default Egress Shaping

The class class-default command configures queue #1. To configure class-default egress shaping, perform this task:

 

Command
Purpose

Step 1

Router(config)# policy-map type lan-queuing parent_policy_name

Creates the parent policy map for the port.

Step 2

Router(config-pmap)# class class-default

Configures the class-default policy map class.

Step 3

Router(config-pmap-c)# bandwidth remaining percent percentage

Allocates DWRR bandwidth.

Step 4

Router(config-pmap-c)# shape average percent percentage

Configures shaping.

Step 5

Router(config-pmap-c)# queue-buffers ratio weight

(Optional) Sets queue buffer size.

Step 6

Router(config-pmap-c)# service-policy child_service_policy

Required to support shaping on WS-X6904-40G-2T nonpriority egress queues numbered greater than one. (Not supported with class-default.)

Step 7

Router(config-pmap-c)# end

(Optional) Exits policy map class configuration mode.

Creating a Queueing Policy

To create a queueing policy, perform this task:

 

Command
Purpose

Step 1

Router(config)# policy-map type lan-queuing policy_name

Creates a policy map.

Step 2

Router(config-pmap)# end

(Optional) Exits policy map class configuration mode.

Configuring a Priority Queue

1p1q4t,1p1q8t,1p7q2t,1p3q8t, 1p7q8t, and 1p7q4t ports have priority queues. To configure the priority queue, perform this task:

 

Command
Purpose

Step 1

Router(config-pmap)# class class_map_name

Creates a policy map class.

Step 2

Router(config-pmap-c)# priority

Applies the class map to the priority queue.

Note The priority queue is not supported if SRR is enabled.

Step 3

Router(config-pmap-c)# queue-buffers ratio weight

(Optional) Sets queue buffer size.

Step 4

Router(config-pmap-c)# end

(Optional) Exits policy map class configuration mode.

Configuring Nonpriority Queues

The first class class_map_name command that you enter that is not followed by the priority keyword configures the highest numbered nonpriority queue. Subsequent class class_map_name commands configure the remaining nonpriority queues in reverse numerical order (highest-numbered to queue #2). The class class-default command configures queue #1. To configure a nonpriority queue, perform this task:

 

Command
Purpose

Step 1

Router(config-pmap)# class { class_map_name | class-default }

Creates a policy map class.

Note

  • Enter a class map name to configure nonpriority queues numbered greater than one.
  • Enter the class-default keyword to configure queue #1.

Step 2

Router(config-pmap-c)# bandwidth [ remaining ] percent percentage

Allocates WRR or DWRR bandwidth.

Note

  • On WS-X6904-40G-2T ports, the bandwidth command must be configured if you configure any nondefault values for any other queueing commands on the port. ( CSCtz05347 )
  • Not required on ports that have one queue.
  • The remaining keyword is required on ports that have a priority queue.

Step 3

Router(config-pmap-c)# shape average percent percentage

(Egress queues only) Enables SRR (not supported on WS-X6904-40G-2T ports), which allocates limited bandwidth between nonpriority egress queues.

Step 4

Router(config-pmap-c)# queue-buffers ratio weight

(Optional) Sets queue buffer size.

Note Not required on ports that have one queue.

Step 5

Router(config-pmap-c)# end

(Optional) Exits policy map class configuration mode.

Configuring Thresholds

Threshold Configuration Guidelines and Restrictions

  • To configure tail drop thresholds, enter queue-limit commands.
  • For ports that support configuration as either tail-drop or WRED drop:

Enter queue-limit commands to configure a threshold as tail drop.

Enter random-detect commands to configure a threshold as WRED drop.

  • The first queue-limit cos , queue-limit dscp , random-detect cos , or random-detect dscp command that you enter configures threshold #1.
  • Subsequent commands with different threshold percentage values configure the remaining thresholds in numerical order (from threshold #2 to the highest-numbered threshold).
  • Subsequent commands with an already configured threshold percentage value apply addition QoS values to the threshold indicated by the percentage value.
  • Ports configured for DSCP-based queueing use CoS-based queueing for non-IP traffic, IP multicast traffic, and IP unknown unicast flood traffic. In queueing policies that configure DSCP-based queueing, configure CoS-based queueing to provide specific QoS for non-IP traffic, IP multicast traffic, and IP unknown unicast flood traffic.

Configuring a Threshold as Tail-Drop with CoS-Based Queueing

To configure a threshold as tail-drop with CoS-based queueing, perform this task:

 

Command
Purpose

Step 1

Router(config-pmap-c)# queue-limit cos { one_value | values value_list} percent percentage

Applies CoS to a tail-drop threshold and configures the threshold percentage.

Step 2

Router(config-pmap-c)# end

(Optional) Exits policy map class configuration mode.

Configuring a Threshold as WRED-Drop with CoS-Based Queueing

To configure a threshold as WRED-drop with CoS-based queueing, perform this task:

 

Command
Purpose

Step 1

Router(config-pmap-c)# random-detect cos-based [ aggregate ]

Enables application of CoS values to a WRED-drop threshold. Enter the aggregate keyword to configure multiple CoS values on the threshold with the values keyword.

Step 2

Router(config-pmap-c)# random-detect cos { one_value | values value_list} percent min_% max_%

Applies CoS to a WRED-drop threshold and configures the threshold percentage.

Step 3

Router(config-pmap-c)# end

(Optional) Exits policy map class configuration mode.

Configuring a Threshold as Tail-Drop with DSCP-Based Queueing

To configure a threshold as tail-drop with DSCP-based queueing, perform this task:

 

Command
Purpose

Step 1

Router(config-pmap-c)# queue-limit multiple-type-based

(Optional) Enables application of CoS, DSCP, or precedence values to a tail-drop threshold.

Step 2

Router(config-pmap-c)# queue-limit { cos | dscp | precedence } { one_value | values value_list} percent percentage

Applies QoS values to a tail-drop threshold and configures the threshold percentage.

Step 3

Router(config-pmap-c)# end

(Optional) Exits policy map class configuration mode.

Configuring a Threshold as WRED-Drop with DSCP-Based Queueing

To configure a threshold as WRED-drop with DSCP-based queueing, perform this task:

 

Command
Purpose

Step 1

Router(config-pmap-c)# random-detect { dscp-based | precedence-based | multiple-type-based } [ aggregate ]

Enables application of QoS values to a WRED-drop threshold.

Note

  • Enter the dscp-based keyword to enable application of DSCP values to a WRED-drop threshold.
  • Enter the precedence-based keyword to enable application of precedence values to a WRED-drop threshold.
  • Enter the multiple-type-based keyword to enable application of both CoS, DSCP, or precedence values to a WRED-drop threshold.
  • Enter the aggregate keyword to configure multiple QoS values on the threshold with the values keyword.

Step 2

Router(config-pmap-c)# random-detect { cos | dscp | precedence } { one_value | values value_list} percent min_% max_%

Applies QoS values to a WRED-drop threshold and configures the threshold percentage.

Step 3

Router(config-pmap-c)# end

(Optional) Exits policy map class configuration mode.

Verifying a Queueing Policy Map

Use the show policy-map policy_name to verify the configuration.

Attaching a Queueing Policy Map to an Interface

To attach a queueing policy to an interface, perform this task:

 

Command
Purpose

Step 1

Router(config)# interface type slot/port

Selects the interface to configure.

Step 2

Router(config-if)# service-policy type lan-queuing [ input | output ] policy_map_name

Attaches a queueing policy to the interface.

Step 3

Router(config-if)# end

Exits configuration mode.

Use the show policy-map interface command to verify the configuration.

Configuration Examples for Policy-Based Queueing

Queueing Policy Sample Configuration

Without comments:

policy-map type lan-queuing p1
class cos5
priority
class cos123
bandwidth remaining percent 25
queue-limit cos 2 percent 20
queue-limit cos 3 percent 30
class class-default
queue-limit cos 6 percent 60

With comments:

policy-map type lan-queuing p1 ! For 1p3q8t
class cos5 ! Configured to filter CoS 5
!The filtering configured in the class map selects the values that go to the queue
!
priority ! Applies the class map to the priority queue (#4)
!
!
!First non-priority class applies to highest-numbered non-priority queue (#3)
class cos123 ! Configured to filter CoS 1, 2, and 3
!The filtering configured in the class map selects the values that go to the queue
!
!
!'remaining' keyword required on ports that have a priority queue
bandwidth remaining percent 25
!
!
!First queue-limit command assigns CoS 2 to threshold #1 and configures it at 20%
queue-limit cos 2 percent 20
!Any other queue-limit command with the same percentage
!applies additional configuration to this threshold
!
!Next queue-limit command with different percentage value configures the next threshold
!Assigns CoS 3 to threshold #2 and configures it at 30%
queue-limit cos 3 percent 30
!Any other queue-limit command with the same percentage
!applies additional configuration to this threshold
!
!Thresholds 3-8 are unconfigured
!All unconfigured thresholds are at 100%
!No explicit configuration provided for CoS 1: defaults to last threshold
!
!End of queue 3 configuration
!
!Queue 2 is unconfigured
!
class class-default ! applies to queue #1
!'class-default' gets all remaining CoS values:
!0, 4, 6, and 7
!
!
!Threshold 1 is explicitly configured:
queue-limit cos 6 percent 50
!
!Remaining thresholds (2-8) are not configured by the queueing policy
!and cannot be configured by anything else
!No explicit configuration provided for CoS 0, 4, and 7:
!CoS values not explicitly configured default to the last threshold

1q2t, 1q8t Ingress Queue Supported Commands


Note • Supports CoS-based queueing with tail-drop thresholds.

  • Unsupported commands are included in this section as comments.


 

policy-map type lan-queuing policy_map_name ! For 1q2t, 1q8t
 
  • Nonpriority queue 1 policy commands:
class class-default ! Receives all CoS values.
! bandwidth percent percentage ! WRR or DWRR bandwidth allocation.
! queue-buffers ratio weight ! Queue buffer size.
 
  • Nonpriority queue threshold configuration (repeat to configure sequential thresholds):
! queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values
! to a tail-drop threshold.
 
queue-limit cos {one_value | values value_list} percent percentage
 
! queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
 
! random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
! random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
! random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
! random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values
! to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
! random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
 
! random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
 
! random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.

2q8t Ingress Queue Supported Commands


Note • Supports CoS-based queueing with tail-drop thresholds.

  • Unsupported commands are included in this section as comments.


 

policy-map type lan-queuing policy_map_name ! For 2q8t, 8q8t
 
  • Class commands for nonpriority queues numbered higher than 1—Configures queues in reverse numerical order; repeat to configure the next queue:
class class_map_name ! Receives CoS values filtered by class_map_name.
 
  • Class command for queue #1:
class class-default ! Receives all remaining CoS values.
 
  • Nonpriority queue configuration commands:
bandwidth percent percentage ! WRR or DWRR bandwidth allocation.
 
queue-buffers ratio weight ! Queue buffer size.
 
  • Nonpriority queue threshold configuration—Repeat to configure sequential thresholds in each queue:
! queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values to a tail-drop threshold.
 
queue-limit cos {one_value | values value_list} percent percentage
! Applies CoS to a tail-drop threshold and configures the threshold percentage
 
! queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
 
! random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
! random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
! random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
 
! random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values
! to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
! random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
 
! random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
 
! random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.

8q4t Ingress Queue Supported Commands


Note • Supports CoS-based, DSCP-based, and precedence-based queueing with tail-drop and WRED-drop thresholds.

  • Unsupported commands are included in this section as comments.


 

policy-map type lan-queuing policy_map_name ! For 8q4t
 
  • Class commands for nonpriority queues numbered higher than 1—Configures queues in reverse numerical order; repeat to configure the next queue:
class class_map_name
! Receives QoS values (CoS, DSCP, precedence) values filtered by class_map_name.
 
  • Class command for queue #1:
class class-default ! Receives all remaining QoS values (CoS, DSCP, precedence).
 
  • Nonpriority queue configuration commands:
bandwidth percent percentage ! WRR or DWRR bandwidth allocation.
 
queue-buffers ratio weight ! Queue buffer size.
 
  • Nonpriority queue threshold configuration—Repeat to configure sequential thresholds in each queue:
queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values to a tail-drop threshold.
 
queue-limit cos {one_value | values value_list} percent percentage
! Applies CoS to a tail-drop threshold and configures the threshold percentage
 
queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
 
random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
 
random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
 
random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
 
random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.

8q8t Ingress Queue Supported Commands


Note • Supports CoS-based queueing with tail-drop or WRED-drop thresholds.

  • Unsupported commands are included in this section as comments.


 

policy-map type lan-queuing policy_map_name ! For 1p1q8t
 
  • Priority queue:
class class_map_name ! Receives CoS values filtered by class_map_name.
priority ! Applies the class map to the priority queue
 
  • Nonpriority queue policy commands:
class class-default ! Receives all remaining CoS values.
! bandwidth remaining percent percentage ! WRR or DWRR bandwidth allocation.
! queue-buffers ratio weight ! Queue buffer size.
 
  • Nonpriority queue threshold configuration—Repeat to configure sequential thresholds:
! queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values to a tail-drop threshold.
!
queue-limit cos {one_value | values value_list} percent percentage
! Applies CoS to a tail-drop threshold and configures the threshold percentage
!
! queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
!
random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values
! to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
!
! random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
!
! random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.

1p1q4t Ingress Queue Supported Commands


Note • Supports CoS-based queueing with tail-drop thresholds.

  • Unsupported commands are included in this section as comments.


 

policy-map type lan-queuing policy_map_name ! For 1p1q4t
 
  • Priority queue:
class class_map_name ! Receives CoS values filtered by class_map_name.
priority ! Applies the class map to the priority queue
 
  • Nonpriority queue policy commands:
class class-default ! Receives all remaining CoS values.
! bandwidth remaining percent percentage ! WRR or DWRR bandwidth allocation.
! queue-buffers ratio weight ! Queue buffer size.
 
  • Nonpriority queue threshold configuration—Repeat to configure sequential thresholds:
! queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values
! to a tail-drop threshold.
!
queue-limit cos {one_value | values value_list} percent percentage
! Applies CoS to a tail-drop threshold and configures the threshold percentage
!
! queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
!
! random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values
! to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
!
! random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
!
! random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.

1p1q8t Ingress Queue Supported Commands


Note • Supports CoS-based queueing with tail-drop or WRED-drop thresholds.

  • Unsupported commands are included in this section as comments.


 

policy-map type lan-queuing policy_map_name ! For 1p1q8t
 
  • Priority queue:
class class_map_name ! Receives CoS values filtered by class_map_name.
priority ! Applies the class map to the priority queue
 
  • Nonpriority queue policy commands:
class class-default ! Receives all remaining CoS values.
! bandwidth remaining percent percentage ! WRR or DWRR bandwidth allocation.
! queue-buffers ratio weight ! Queue buffer size.
 
  • Nonpriority queue threshold configuration—Repeat to configure sequential thresholds:
! queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values to a tail-drop threshold.
!
queue-limit cos {one_value | values value_list} percent percentage
! Applies CoS to a tail-drop threshold and configures the threshold percentage
!
! queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
!
random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values
! to a WRED-drop threshold.
!
random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
!
! random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
!
! random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.

1p7q2t Ingress Queue Supported Commands


Note • Supports CoS-based, DSCP-based, and precedence-based queueing with tail-drop and WRED-drop thresholds.

  • Unsupported commands are included in this section as comments.


 

policy-map type lan-queuing policy_map_name ! For 1p7q2t
 
  • Priority queue:
class class_map_name
! Receives QoS values (CoS, DSCP, precedence) values filtered by class_map_name.
priority ! Applies the class map to the priority queue
 
  • Class commands for nonpriority queues numbered higher than 1—Configures queues in reverse numerical order; repeat to configure the next queue:
class class_map_name
! Receives QoS values (CoS, DSCP, precedence) values filtered by class_map_name.
 
  • Class command for queue #1:
class class-default ! Receives all remaining QoS values (CoS, DSCP, precedence).
 
  • Nonpriority queue configuration commands:
bandwidth percent percentage ! WRR or DWRR bandwidth allocation.
!
queue-buffers ratio weight ! Queue buffer size.
 
  • Nonpriority queue threshold configuration—Repeat to configure sequential thresholds in each queue:
queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values to a tail-drop threshold.
!
queue-limit cos {one_value | values value_list} percent percentage
! Applies CoS to a tail-drop threshold and configures the threshold percentage
!
queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
!
random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
!
random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
!
random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.

1p3q8t Egress Queue Supported Commands


Note • Supports CoS-based queueing with tail-drop and WRED-drop thresholds.

  • Unsupported commands are included in this section as comments.


 

policy-map type lan-queuing policy_map_name ! For 1p3q8t
 
  • Priority queue:
class class_map_name ! Receives CoS values filtered by class_map_name.
priority ! Applies the class map to the priority queue
 
  • Class commands for nonpriority queues numbered higher than 1—Configures queues in reverse numerical order; repeat to configure the next queue:
class class_map_name ! Receives CoS values filtered by class_map_name.
 
  • Class command for queue #1:
class class-default ! Receives all remaining CoS values.
 
  • Nonpriority queue configuration commands:
bandwidth percent percentage ! WRR or DWRR bandwidth allocation.
!
! shape average percent percentage ! SRR bandwidth allocation.
!
queue-buffers ratio weight ! Queue buffer size.
 
  • Nonpriority queue threshold configuration—Repeat to configure sequential thresholds:
! queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values to a tail-drop threshold.
!
queue-limit cos {one_value | values value_list} percent percentage
! Applies CoS to a tail-drop threshold and configures the threshold percentage
!
! queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
!
random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values
! to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
!
! random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
!
! random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.

1p7q8t Egress Queue Supported Commands


Note • Supports CoS-based queueing with tail-drop and WRED-drop thresholds.

  • Unsupported commands are included in this section as comments.


 

policy-map type lan-queuing policy_map_name ! For 1p7q8t
 
  • Priority queue:
class class_map_name ! Receives CoS values filtered by class_map_name.
priority ! Applies the class map to the priority queue
 
  • Class commands for nonpriority queues numbered higher than 1—Configures queues in reverse numerical order; repeat to configure the next queue:
class class_map_name ! Receives CoS values filtered by class_map_name.
 
  • Class command for queue #1:
class class-default ! Receives all remaining CoS values.
 
  • Nonpriority queue configuration commands:
bandwidth percent percentage ! WRR or DWRR bandwidth allocation.
!
! shape average percent percentage ! SRR bandwidth allocation.
!
queue-buffers ratio weight ! Queue buffer size.
 
  • Nonpriority queue threshold configuration—Repeat to configure sequential thresholds:
! queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values to a tail-drop threshold.
!
queue-limit cos {one_value | values value_list} percent percentage
! Applies CoS to a tail-drop threshold and configures the threshold percentage
!
! queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
!
random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
! random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values
! to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
!
! random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
!
! random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.

1p7q4t, 2p6q4t Ingress or Egress Queue Supported Commands


Note • Supports CoS-based, DSCP-based, and precedence-based queueing with tail-drop and WRED-drop thresholds. Supports SRR (except WS-X6904-40G-2T) or DWRR dequeueing.


 

  • Priority queue except WS-X6904-40G-2T with multiple priority queues:
class class_map_name
! Receives QoS values (CoS, DSCP, precedence) values filtered by class_map_name.
priority ! Applies the class map to the priority queue
! Not supported if SRR mode is enabled.
!
queue-buffers ratio weight ! Queue buffer size.
!
 
  • WS-X6904-40G-2T priority queues:
class class_map_name
! Receives QoS values (CoS, DSCP, precedence) values filtered by class_map_name.
priority [level { 1 | 2}]
! Applies the class map to one of the priority queues
!
queue-buffers ratio weight ! Queue buffer size.
!
 
  • Class commands for nonpriority queues numbered higher than 1—Configures queues in reverse numerical order; repeat to configure the next queue:
class class_map_name
! Receives QoS values (CoS, DSCP, precedence) values filtered by class_map_name.
 
  • Class command for queue #1:
class class-default ! Receives all remaining QoS values (CoS, DSCP, precedence).
 
  • Nonpriority queue configuration commands:
shape average percent percentage
! Enables SRR on nonpriority egress queues.
 
bandwidth remaining percent percentage
! DWRR bandwidth allocation.

Note On WS-X6904-40G-2T ports, the bandwidth command must be configured if you configure any nondefault values for any other queueing commands on the port. (CSCtz05347)


!
queue-buffers ratio weight ! Queue buffer size.
!
  • Nonpriority queue threshold configuration—Repeat to configure sequential thresholds in each queue:
queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values to a tail-drop threshold.
!
queue-limit cos {one_value | values value_list} percent percentage
! Applies CoS to a tail-drop threshold and configures the threshold percentage
!
queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
!
random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
!
random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
!
random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.

WS-X6904-40G-2T 1p7q4t, 2p6q4t Egress Queue Supported Commands


Note • Supports CoS-based, DSCP-based, and precedence-based queueing with tail-drop and WRED-drop thresholds. Supports DWRR dequeueing.

  • Unsupported commands are included in this section as comments.
  • You configure shaping with a child policy map for the nonpriority queues that you apply to a class-default parent policy map.
  • Without shaping, you configure all policy-map class commands in one policy map.


 

  • (For shaping) Child policy map command for nonpriority queues numbered higher than 1:
policy-map type lan-queuing child_policy_name
 
  • Policy map class commands for nonpriority queues numbered higher than 1—Configures nonpriority queues in reverse numerical order; repeat to configure the next queue:
class class_map_name
! Receives QoS values (CoS, DSCP, precedence) values filtered by class_map_name.
 
  • Configuration commands for nonpriority queues numbered higher than 1:
shape average percent percentage
 
bandwidth remaining percent percentage
! DWRR bandwidth allocation.

Note On WS-X6904-40G-2T ports, the bandwidth command must be configured if you configure any nondefault values for any other queueing commands on the port. (CSCtz05347)


!
queue-buffers ratio weight ! Queue buffer size.
!
  • Nonpriority queue threshold configuration—Repeat to configure sequential thresholds in each queue:
queue-limit multiple-type-based
! Enables application of CoS, precedence, and DSCP values to a tail-drop threshold.
!
queue-limit cos {one_value | values value_list} percent percentage
! Applies CoS to a tail-drop threshold and configures the threshold percentage
!
queue-limit dscp {one_value | values value_list} percent percentage
! Applies one DSCP value to a tail-drop threshold
! and configures the threshold percentage
!
random-detect cos-based [aggregate]
! Enables application of CoS values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect dscp-based [aggregate]
! Enables application of DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect precedence-based [aggregate]
! Enables application of precedence values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect multiple-type-based [aggregate]
! Enables application of CoS, precedence, and DSCP values to a WRED-drop threshold.
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos {one_value | values value_list} percent min_% max_%
! Applies CoS to a WRED-drop threshold and configures the threshold percentages.
!
random-detect dscp {one_value | values value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
!
random-detect {precedence one_value | values precedence value_list} percent min_% max_%
! Applies DSCP to a WRED-drop threshold and configures the threshold percentages.
 
  • Single priority queue without shaping:
class class_map_name
! Receives QoS values (CoS, DSCP, precedence) values filtered by class_map_name.
priority ! Applies the class map to the priority queue
!
queue-buffers ratio weight ! Queue buffer size.
!
 
  • Multiple priority queues without shaping:
class class_map_name
! Receives QoS values (CoS, DSCP, precedence) values filtered by class_map_name.
priority level { 1 | 2}
! Applies the class map to one of the priority queues
!
queue-buffers ratio weight ! Queue buffer size.
!
 
  • Egress priority queues (single or multiple) with shaping:
class class_map_name
! Receives QoS values (CoS, DSCP, precedence) values filtered by class_map_name.
priority level { 1 | 2} percent percentage
! Applies the class map to one of the priority queues
! Configures shaping on the queue
!
queue-buffers ratio weight ! Queue buffer size.
!
 
  • (For shaping) Parent policy map command for queue #1 (class-default):
policy-map type lan-queuing parent_policy_name
 
  • Class command for queue #1 (class-default):
class class-default ! Receives all remaining QoS values (CoS, DSCP, precedence).
 
shape average percent percentage
 
bandwidth remaining percent percentage
! DWRR bandwidth allocation.

Note On WS-X6904-40G-2T ports, the bandwidth command must be configured if you configure any nondefault values for any other queueing commands on the port. (CSCtz05347)


!
queue-buffers ratio weight ! Queue buffer size.
!
service-policy child_service_policy
! If shaping is configured on the other nonpriority queues
 

To configure class-default thresholds, see the “Nonpriority queue threshold configuration” informatio n.

1q2t Ingress Queue Sample Configuration


Note Supports CoS-based queueing with tail-drop thresholds.


policy-map type lan-queuing p_map_1q2t
class class-default ! Receives all CoS values.
!
! Configures threshold #1:
queue-limit cos values 0 1 3 4 percent 80
! Applies CoS values to threshold 1 and configures the threshold percentage
!
! Other thresholds unconfigured; default to 100%
! Remaining CoS values are not explicitly configured:
! default to threshold 8 at 100%

1q8t Ingress Queue Sample Configuration


Note Supports CoS-based queueing with tail-drop thresholds.


policy-map type lan-queuing p_map_1q8t
class class-default ! Receives all CoS values.
!
! Configures threshold #1:
queue-limit cos 0 percent 50
! Applies CoS 0 to threshold 1 and configures the threshold percentage
!
! Configures threshold #2:
queue-limit cos values 1 2 3 4 percent 60
! Applies CoS 1, 2, 3, 4 to threshold 2 and configures the threshold percentage
!
! Configures threshold #3:
queue-limit cos values 6 7 percent 80
! Applies CoS 6 and 7 to threshold 3 and configures the threshold percentage
!
! Other thresholds unconfigured; default to 100%
! CoS 5 is not explicitly configured: defaults to threshold 8 at 100%

2q8t Ingress Queue Sample Configuration


Note Supports CoS-based queueing with tail-drop thresholds.


class-map type lan-queuing match-any c_map_cos_5
match cos 5
!
policy-map type lan-queuing p_map_2q8t ! For 2q8t
!
! Configures queue #2:
class c_map_cos_5
! Receives QoS values (CoS, DSCP, precedence) values filtered by c_map_cos_5.
!
bandwidth percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 20 ! Queue buffer size.
!
queue-limit cos 5 percent 100
! Applies CoS 5 to threshold 1 and configures the threshold percentage
!
! Configures queue #1:
class class-default ! Receives all remaining CoS values.
!
bandwidth percent 90 ! WRR bandwidth allocation.
!
queue-buffers ratio 20 ! Queue buffer size.
!
! Configures threshold #1:
queue-limit cos values 0 1 percent 70
! Applies CoS 0 1 to threshold 1 and configures the threshold percentage
!
! Configures threshold #2:
queue-limit cos values 2 3 percent 80
! Applies CoS 2 3 to threshold 2 and configures the threshold percentage
!
! Configures threshold #3:
queue-limit cos 4 percent 90
! Applies CoS 4 to threshold 3 and configures the threshold percentage
!
! CoS 6 and 7 default to threshold 4 at 100%

8q4t, 8q8t Ingress Queue Sample Configuration (CoS-Based Queueing)


Note • Supports CoS-based, DSCP-based, and precedence-based queueing with tail-drop and WRED-drop thresholds. This sample configures CoS-based queueing.


 

class-map type lan-queuing match-any c_map_cos_5
match cos 5
!
policy-map type lan-queuing p_map_8q4t_cos_8q8t ! For 8q4t CoS-based queueing and 8q8t
 
! Configures queue #8:
class c_map_cos_5 ! Receives CoS values values filtered by c_map_cos_5.
!
bandwidth percent 90 ! WRR bandwidth allocation.
queue-buffers ratio 20 ! Queue buffer size.
!
! CoS 5 defaults to threshold 4 at 100%
!
! Configures queue #1:
class class-default
! Receives all remaining CoS values.
!
bandwidth percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 80 ! Queue buffer size.
!
! Configures threshold #1:
random-detect cos-based aggregate
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos values 0 1 percent 40 70
!
! Configures threshold #2:
random-detect cos-based aggregate
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos values 2 3 percent 40 80
!
! Configures threshold #3:
random-detect cos-based
!
random-detect cos value 4 percent 50 90
!
! Configures threshold #4:
random-detect cos-based aggregate
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos values 6 7 percent 50 100

8q4t Ingress Queue Sample Configuration (DSCP-Based Queueing)


Note • Supports CoS-based, DSCP-based, and precedence-based queueing with tail-drop and WRED-drop thresholds. This sample configures DSCP-based queueing.


 

class-map type lan-queuing match-any c_map_cos_5_dscp_40_46
match cos 5
!
match dscp 40 46
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
class-map type lan-queuing match-any c_map_dscp_48-63
match dscp 48 49 50 51 52 53 54 55
match dscp 56 57 58 59 60 61 62 63
 
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
class-map type lan-queuing match-any c_map_dscp_32_34-38
match dscp 32 34 35 36 37 38
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
class-map type lan-queuing match-any c_map_dscp_24_26_28_30
match dscp 24 26 28 30
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
class-map type lan-queuing match-any c_map_dscp_18_20_22
match dscp 18 20 22
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
class-map type lan-queuing match-any c_map_dscp_10_12_14
match dscp 10 12 14
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
policy-map type lan-queuing p_map_8q4t_dscp ! For 8q4t DSCP-based queueing
 
! Configures queue #8:
class c_map_cos_5_dscp_40_46
! Receives QoS values (CoS, DSCP, precedence) values filtered by c_map_cos_5.
!
bandwidth percent 90 ! WRR bandwidth allocation.
queue-buffers ratio 20 ! Queue buffer size.
!
! CoS 5 and DSCP 40, 46 default to threshold 4 at 100%
!
! Configures queue #7:
class c_map_dscp_48-63
! Receives QoS values (CoS, DSCP, precedence) values filtered by c_map_dscp_48-63.
!
bandwidth remaining percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 10 ! Queue buffer size.
!
! DSCP 48-63 default to threshold 4 at 100%
!
! Configures queue #6:
class c_map_dscp_32_34-38
! Receives QoS values (CoS, DSCP, precedence) values filtered by c_map_dscp_32_34-38.
!
bandwidth remaining percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 10 ! Queue buffer size.
!
! DSCP 32, 34-38 default to threshold 4 at 100%
!
! Configures queue #5:
class c_map_dscp_24_26_28_30
! Receives QoS values (CoS, DSCP, precedence) values filtered by c_map_dscp_24_26_28_30.
!
bandwidth remaining percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 10 ! Queue buffer size.
!
! DSCP 24, 26, 28, 30 default to threshold 4 at 100%
!
! Configures queue #4:
class c_map_dscp_18_20_22
! Receives QoS values (CoS, DSCP, precedence) values filtered by c_map_dscp_18_20_22.
!
bandwidth remaining percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 10 ! Queue buffer size.
!
! Configures threshold #1:
random-detect dscp-based
random-detect dscp 20 percent 70 100
random-detect dscp 22 percent 70 100
random-detect dscp 18 percent 70 100
!
! Configures queue #3:
class c_map_dscp_10_12_14
! Receives QoS values (CoS, DSCP, precedence) values filtered by c_map_dscp_10_12_14.
!
bandwidth remaining percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 10 ! Queue buffer size.
!
! Configures threshold #1:
random-detect dscp-based
random-detect dscp 14 percent 70 100
random-detect dscp 12 percent 70 100
random-detect dscp 10 percent 70 100
!
! Configures queue #1:
class class-default
! Receives all remaining QoS values (CoS, DSCP, precedence).
!
bandwidth percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 80 ! Queue buffer size.
!
! Configures threshold #1:
random-detect cos-based aggregate
random-detect cos values 0 1 percent 40 70
!
! Configures threshold #2:
random-detect cos-based aggregate
random-detect cos values 2 3 percent 40 80
!
! Configures threshold #3:
random-detect cos-based
random-detect cos value 4 percent 50 90
!
! Configures threshold #4:
random-detect cos-based aggregate
random-detect cos values 6 7 percent 50 100
! DSCP values default to this threshold
! 0-9, 11, 13, 15-17, 19, 21, 23, 25, 27, 29, 31, 33, 39, 41-45, 47

1p1q4t Ingress Queue Sample Configuration


Note Supports CoS-based queueing with tail-drop thresholds.


class-map type lan-queuing match-any c_map_cos_5
match cos 5
!
policy-map type lan-queuing p_map_1p1q4t ! For 1p1q4t
!
! Configures the priority queue:
class c_map_cos_5 ! Receives CoS values filtered by c_map_cos_5.
priority ! Applies the class map to the priority queue
!
! Configures queue #1:
class class-default ! Receives all remaining CoS values.
!
! Configures threshold #1
queue-limit cos values 0 1 percent 70
! Applies CoS 0 1 to threshold 1 and configures the threshold percentage
!
! Configures threshold #2
queue-limit cos values 2 3 percent 80
! Applies CoS 2 3 to threshold 2 and configures the threshold percentage
!
! Configures threshold #3
queue-limit cos 4 percent 90
! Applies CoS 4 to threshold 3 and configures the threshold percentage
!
! CoS 6 and 7 default to threshold 4 at 100%
 

1p1q8t Ingress Queue Sample Configuration


Note Supports CoS-based queueing with tail-drop or WRED-drop thresholds.


class-map type lan-queuing match-any c_map_cos_5
match cos 5
!
policy-map type lan-queuing p_map_1p1q8t ! For 1p1q8t
!
! Configures the priority queue:
class c_map_cos_5 ! Receives CoS values filtered by c_map_cos_5.
priority ! Applies the class map to the priority queue
!
class class-default ! Receives all remaining CoS values.
!
random-detect cos-based
! Enables application of CoS values to a WRED-drop threshold.
!
! Configures threshold #1
random-detect cos 0 percent 40 70
! Applies CoS to WRED-drop threshold 1 and configures the threshold percentages.
!
! Configures threshold #2
random-detect cos 1 percent 40 70
! Applies CoS to WRED-drop threshold 2 and configures the threshold percentages.
!
! Configures threshold #3
random-detect cos 2 percent 50 80
! Applies CoS to WRED-drop threshold 3 and configures the threshold percentages.
!
! Configures threshold #4
random-detect cos 3 percent 50 80
! Applies CoS to WRED-drop threshold 4 and configures the threshold percentages.
!
! Configures threshold #5
random-detect cos 4 percent 60 90
! Applies CoS to WRED-drop threshold 5 and configures the threshold percentages.
!
! Configures threshold #6
random-detect cos 6 percent 60 90
! Applies CoS to WRED-drop threshold 6 and configures the threshold percentages.
!
! Configures threshold #7
random-detect cos 7 percent 70 100
! Applies CoS to WRED-drop threshold 7 and configures the threshold percentages.

1p3q8t Egress Queue Sample Configuration


Note Supports CoS-based queueing with tail-drop and WRED-drop thresholds.


class-map type lan-queuing match-any c_map_cos_2_3_4
match cos 2 3 4
!
class-map type lan-queuing match-any c_map_cos_5
match cos 5
!
class-map type lan-queuing match-any c_map_cos_6_7
match cos 6 7
!
policy-map type lan-queuing p_map_1p3q8t
!
! Configures the priority queue:
class c_map_cos_5 ! Receives CoS values filtered by c_map_cos_5.
priority ! Applies the class map to the priority queue
!
! Configures queue #3 for 1p3q8t:
class c_map_cos_6_7
! Receives CoS values values filtered by c_map_cos_6_7.
!
bandwidth remaining percent 40 ! WRR bandwidth allocation.
queue-buffers ratio 15 ! Queue buffer size.
!
! Configures threshold #1:
random-detect cos-based aggregate
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos values 6 7 percent 70 100
!
! Configures queue #2 for 1p3q8t:
class c_map_cos_2_3_4
! Receives CoS values values filtered by c_map_cos_2_3_4.
!
bandwidth remaining percent 30 ! WRR bandwidth allocation.
queue-buffers ratio 20 ! Queue buffer size.
!
! Configures threshold #1:
random-detect cos-based
!
random-detect cos 2 percent 40 70
! Applies CoS to WRED-drop threshold 1 and configures the threshold percentages.
!
! Configures threshold #2:
random-detect cos-based aggregate
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos values 3 4 percent 70 100
! Applies CoS to WRED-drop threshold 2 and configures the threshold percentages.
!
! Configures queue #1:
class class-default
! Receives all remaining CoS values.
!
bandwidth remaining percent 25 ! WRR bandwidth allocation.
queue-buffers ratio 20 ! Queue buffer size.
!
! Configures threshold #1:
random-detect cos-based
!
random-detect cos 0 percent 40 70
! Applies CoS to WRED-drop threshold 1 and configures the threshold percentages.
!
! Configures threshold #2:
random-detect cos-based
!
random-detect cos 1 percent 70 100
! Applies CoS to WRED-drop threshold 2 and configures the threshold percentages.

1p7q8t Egress Queue Sample Configuration


Note Supports CoS-based queueing with tail-drop and WRED-drop thresholds.


class-map type lan-queuing match-any c_map_cos_2_3_4
match cos 2 3 4
!
class-map type lan-queuing match-any c_map_cos_5
match cos 5
!
class-map type lan-queuing match-any c_map_cos_6_7
match cos 6 7
!
policy-map type lan-queuing p_map_1p7q8t
!
! Configures the priority queue:
class c_map_cos_5 ! Receives CoS values filtered by c_map_cos_5.
priority ! Applies the class map to the priority queue
!
! Configures queue #7:
class c_map_cos_6_7
! Receives CoS values values filtered by c_map_cos_6_7.
!
bandwidth remaining percent 40 ! WRR bandwidth allocation.
queue-buffers ratio 15 ! Queue buffer size.
!
! Configures threshold #1:
random-detect cos-based aggregate
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos values 6 7 percent 70 100
!
! Configures queue #6 for 1p7q8t:
class c_map_cos_2_3_4
! Receives CoS values values filtered by c_map_cos_2_3_4.
!
bandwidth remaining percent 30 ! WRR bandwidth allocation.
queue-buffers ratio 20 ! Queue buffer size.
!
! Configures threshold #1:
random-detect cos-based
!
random-detect cos 2 percent 40 70
! Applies CoS to WRED-drop threshold 1 and configures the threshold percentages.
!
! Configures threshold #2:
random-detect cos-based aggregate
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos values 3 4 percent 70 100
! Applies CoS to WRED-drop threshold 2 and configures the threshold percentages.
!
! Configures queue #1:
class class-default
! Receives all remaining CoS values.
!
bandwidth remaining percent 25 ! WRR bandwidth allocation.
queue-buffers ratio 50 ! Queue buffer size.
!
! Configures threshold #1:
random-detect cos-based
!
random-detect cos 0 percent 40 70
! Applies CoS to WRED-drop threshold 1 and configures the threshold percentages.
!
! Configures threshold #2:
random-detect cos-based
!
random-detect cos 1 percent 70 100
! Applies CoS to WRED-drop threshold 2 and configures the threshold percentages.

1p7q4t Ingress or Egress Queue Sample Configuration (CoS-Based Queueing)


Note Supports CoS-based, DSCP-based, and precedence-based queueing with tail-drop and WRED-drop thresholds. Supports SRR (except WS-X6904-40G-2T) or DWRR dequeueing. This sample configures CoS-based queueing.


class-map type lan-queuing match-any c_map_cos_5
match cos 5
!
policy-map type lan-queuing p_map_1p7q4t_cos
 
! Configures the priority queue:
class c_map_cos_5 ! Receives CoS values filtered by c_map_cos_5.
priority ! Applies the class map to the priority queue
!
! Configures queue #1:
class class-default
! Receives all remaining CoS values.
!
bandwidth remaining percent 85 ! WRR bandwidth allocation.

Note On WS-X6904-40G-2T ports, the bandwidth command must be configured if you configure any nondefault values for any other queueing commands on the port. (CSCtz05347)


queue-buffers ratio 10 ! Queue buffer size.
!
! Configures threshold #1:
random-detect cos-based aggregate
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos values 0 1 percent 40 70
!
! Configures threshold #2:
random-detect cos-based aggregate
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos values 2 3 percent 40 80
!
! Configures threshold #3:
random-detect cos-based
!
random-detect cos value 4 percent 50 90
!
! Configures threshold #4:
random-detect cos-based aggregate
! The 'aggregate' keyword allows use of the 'values' keyword
!
random-detect cos values 6 7 percent 50 100

1p7q4t Ingress or Egress Queue Sample Configuration (DSCP-Based Queueing)


Note Supports CoS-based, DSCP-based, and precedence-based queueing with tail-drop and WRED-drop thresholds. Supports SRR (except WS-X6904-40G-2T) or DWRR dequeueing. This sample configures DSCP-based queueing.


class-map type lan-queuing match-any c_map_cos_5_dscp_40_46
match cos 5
!
match dscp 40 46
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
class-map type lan-queuing match-any c_map_dscp_48-63
match dscp 48 49 50 51 52 53 54 55
match dscp 56 57 58 59 60 61 62 63
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
class-map type lan-queuing match-any c_map_dscp_32_34-38
match dscp 32 34 35 36 37 38
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
class-map type lan-queuing match-any c_map_dscp_24_26_28_30
match dscp 24 26 28 30
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
class-map type lan-queuing match-any c_map_dscp_18_20_22
match dscp 18 20 22
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
class-map type lan-queuing match-any c_map_dscp_10_12_14
match dscp 10 12 14
! NOTE: Enables DSCP-based queueing on the port in the direction of the queueing policy.
!
policy-map type lan-queuing p_map_1p7q4t_dscp
 
! Configures the priority queue:
class c_map_cos_5_dscp_40_46 ! Receives CoS values filtered by c_map_cos_5_dscp_40_46.
priority ! Applies the class map to the priority queue
!
! Configures queue #7:
class c_map_dscp_48-63
! Receives QoS values (CoS, DSCP, precedence) values filtered by c_map_dscp_48-63.
!
bandwidth remaining percent 10 ! WRR bandwidth allocation.

Note On WS-X6904-40G-2T ports, the bandwidth command must be configured if you configure any nondefault values for any other queueing commands on the port. (CSCtz05347)


queue-buffers ratio 10 ! Queue buffer size.
!
! DSCP 48-63 default to threshold 4 at 100%
!
! Configures queue #6:
class c_map_dscp_32_34-38
! Receives QoS values (CoS, DSCP, precedence) values filtered by c_map_dscp_32_34-38.
!
bandwidth remaining percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 10 ! Queue buffer size.
!
! DSCP 32, 34-38 default to threshold 4 at 100%
!
! Configures queue #5:
class c_map_dscp_24_26_28_30
! Receives QoS values (CoS, DSCP, precedence) values
! filtered by c_map_dscp_24_26_28_30.
!
bandwidth remaining percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 10 ! Queue buffer size.
!
! Configures threshold #1
queue-limit dscp values 24 30 percent 100
!
! Configures threshold #2
queue-limit dscp 28 percent 100
!
! Configures threshold #3
queue-limit dscp 26 percent 100
!
! Configures queue #4:
class c_map_dscp_18_20_22
! Receives QoS values (CoS, DSCP, precedence) values filtered by c_map_dscp_18_20_22.
!
bandwidth remaining percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 10 ! Queue buffer size.
!
! Configures threshold #1:
random-detect dscp-based
random-detect dscp 20 percent 70 100
!
! Configures threshold #2:
random-detect dscp-based
random-detect dscp 22 percent 70 100
!
! Configures threshold #3:
random-detect dscp-based
random-detect dscp 18 percent 70 100
!
! Configures queue #3:
class c_map_dscp_10_12_14
! Receives QoS values (CoS, DSCP, precedence) values filtered by ! c_map_dscp_10_12_14.
!
bandwidth remaining percent 10 ! WRR bandwidth allocation.
queue-buffers ratio 10 ! Queue buffer size.
!
! Configures threshold #1:
random-detect dscp-based
random-detect dscp 14 percent 70 100
random-detect dscp 12 percent 70 100
random-detect dscp 10 percent 70 100
!
! Configures queue #1:
class class-default
! Receives all remaining QoS values (CoS, DSCP, precedence).
!
bandwidth remaining percent 25 ! WRR bandwidth allocation.
queue-buffers ratio 10 ! Queue buffer size.
!
! Configures threshold #1:
random-detect cos-based aggregate
random-detect cos values 0 1 percent 40 70
!
! Configures threshold #2:
random-detect cos-based aggregate
random-detect cos values 2 3 percent 40 80
!
! Configures threshold #3:
random-detect cos-based
random-detect cos value 4 percent 50 90
!
! Configures threshold #4:
! Remaining DSCP values default to this threshold
! 0-9, 11, 13, 15-17, 19, 21, 23, 25, 27, 29, 31, 33, 39, 41-45, 47
!
random-detect cos-based aggregate
random-detect cos values 6 7 percent 50 100


Tip For additional information about Cisco Catalyst 6500 Series Switches (including configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_support_series_home.html

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