QoS Features - ActForNet...[Quidway-behavior-chentao]? car car operation deny Specify filter deny parameters ip urpf urpf switch mirroring Mirroring operation of packets nest Add outside

QoS Features

1

Contents

Title 1 QOS Overview

Title 2 Mapping

Title 3 Classification, marking, and policing

Title 4 Queue shaping and scheduling

Title 5 Summary

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QoS Ingress Feature Set

Ingress translation

Ingress Classification

BA Mapping

VLANID

802.1P

Classifier IP DSCP

802.1P

EXP

Ingress Actions

Actions

• ACL-based (SMAC/ DMAC, IP SA/DA, Protocol, L4 Ports, L4 protocol field) • CoS • IP ToS / DSCP • …….

• CAR • Deny • Permit • Remark • Redirect • Statistics

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QoS Egress Feature Set

Congestion

Avoidance

Output Shaping & Scheduling

PHB Mapping (Remark)

WRED

Tail Drop Shaping • Port shaping

• Queue shaping

Scheduling • SP

• WRR

• DRR

• PQ+WRR

• PQ+DRR

802.1P

IP DSCP

EXP

Egress

Action

Actions

• CAR • Deny • Permit • Remark • Statistics

Egress

Classification

Classifier

• ACL-based (SMAC/ DMAC, IP SA/DA, Protocol, L4 Ports, L4 protocol field) • CoS • IP Precedence • DSCP •…

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Contents

Title 1 QOS Overview

Title 2 Mapping

Title 3 Classification, marking, and policing

Title 4 Queue shaping and scheduling

Title 5 Summary

5

BA Mapping

According to the external priority

mapping to the internal priority

External priority (the ingress

packets take)

802.1P of VLAN

DSCP of IP packet

EXP of MPLS packet

S97 Internal Priority has 8 levels

BE: Best Effort

AF(1-4): Assured Forwarding

EF: Expedited Forwarding

CS6, CS7: higher than EF

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Mapping CLI

ip-dscp-inbound dscp-value phb service-class [ color ]

8021p-inbound 8021p-value phb service-class [ green | yellow | red ]

mpls-exp-inbound exp-value phb service-class [ color ]

ip-dscp-outbound service-class color map dscp-value

8021p-outbound service-class { green | yellow | red } map 8021p-value

mpls-exp-outbound service-class color map exp-value

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PHB Mapping (Remark)

According to the internal priority and discard grades

mapping to the external priority for next devices

Has three levels discard grade that for CAR

Green

Yellow

Red

External priority:

802.1P of VLAN

DSCP of IP packet

EXP of MPLS packet

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Contents

Title 1 QOS Overview

Title 2 Mapping

Title 3 Classification, marking, and policing

Title 4 Queue shaping and scheduling

Title 5 Summary

9

Classifier

Application

QOS Configuration - MQC

MQC defines three-

step configuration

model

Define match criteria

traffic classifier

define class

Traffic Behavior

Attach policy with

each Behavior and

class to interface or

VLAN or Global

Traffic Policy

RULE

Traffic Policy

Traffic

Classifier Traffic

Behavior

ACL IF-MATCH

Interface Global VLAN

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Traffic Classifier QOS traffic classes identify traffic according to match criteria

[Quidway-classifier-chentao]if-match ?

acl Specify ACL to match

any Specify any data packet to match

cvlan-8021p Specify customer vlan 802.1p to match

cvlan-id Specify customer vlan id to match

destination-mac Specify destination mac address to match

double-tag Specify QinQ packets to match

dscp Specify dscp of ip packets to match

inbound-interface Specify inbound interface to match

ip-precedence Specify IP precedence to match

l2-protocol Specify layer-2 protocol to match

mpls-exp Specify experimental of mpls packets to match

outbound-interface Specify outbound interface to match

protocol Specify ipv4 or ipv6 packets to match

source-mac Specify source MAC address to match

tcp Specify TCP parameters to match

vlan-8021p Specify vlan 802.1p to match

vlan-id Specify vlan id to match

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Traffic Classifier

One classifier has two logic of “and” and “ or”, and default

is or

And traffic classifier test operator and

if-match 1 acl 2000

if-match 3 vlan-id 5

if-match 4 ip-precedence 3

Or traffic classifier test operator or

if-match 1 acl 2000

if-match 3 vlan-id 5

if-match 4 ip-precedence 3

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Traffic Behavior

The mainly action as below

[Quidway-behavior-chentao]?

car car operation deny Specify filter deny parameters ip urpf urpf switch mirroring Mirroring operation of packets nest Add outside vlan tag to packets permit Specify filter permit parameters redirect Redirect packets remark Remark QoS values of the packet statistic Statistic disable mac learn

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Traffic Policy

Traffic policy is associate traffic classifier and behavior

[Quidway-trafficpolicy-chentao]display this

#

traffic policy chentao

classifier chen behavior chen

classifier chentao behavior chentao

#

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Traffic Policy Application

Application on interface, VLAN, and Gloabl

On interface

[SRV-12-GigabitEthernet2/0/1]traffic-policy 1 inbound (outbound)

On trunk:

[SRV-12-Eth-Trunk1]traffic-policy test inbound (outbound)

On Vlan:

[SRV-12-vlan100]traffic-policy 1 inbound (outbound)

On Global:

traffic-policy 1 global inbound (outbound) [slot ?]

The application priority is

When same classifier: interface > vlan > Global

When different classifier：rule mixed L2 and L3 > L2 rule >

L3 rule

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Congestion Avoidance

Support TD and WRED, and the default configuration is TD

drop-profile drop-profile-name

color { green | non-tcp | red | yellow } low-limit low-limit-percentage

high-limit high-limit-percentage discard-percentage discard-

percentage

qos wred drop-profile-name

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TD Introduce

TD (Tail Drop): the traditional method for congestion, and will drop

all packets when queue is full

TD will take some problems that: TCP global synchronization High delay and high jitter Same discard, and don’t differ packets of different priority

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WRED Introduce

WRED discard packet accord to priority of DSCP, 802.1P,EXP, and classifier

Each discard policy contains three parameters: low limit, high limit and

discard- percentage

Support three discard level: Green, Yellow, Red

If after WRED, the queue is still full, device will use TD to handle

congestion

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RED with Multiple Thresholds

Discard Probability

Average Queue Length

0

1

“Red” Threshold

0 “Yellow” Threshold

“Green” Threshold

“Red” Packets

“Green” Packets

“Yellow” Packets

Full

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Traffic Policing - CAR

S9700 support 2 level CAR:

First CAR on rule, and next CAR on classifier

First CAR is trTCM and next CAR is srTCM

Scenario

For two traffic, for each traffic, 100M for first CAR for each

traffic, then 150M for next CAR for all two traffic

100M

150M

100M

RULE-1

RULE-2

First CAR (trTCM)

Aggregated CAR(srTCM)

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CAR for city_a share

Traffic Policing – Hierarchical CAR

Support CAR share, same classifier share same CAR

[Quidway-behavior-peng]car cir 1000 share

[Switch] qos car city_a cir 2000

• [Switch] traffic behavior city_a_ef

• [Switch-behavior-city_a_ef] car cir 700 pir 2000

• [Switch-behavior-city_a_ef] car city_a share

• [Switch-behavior-city_a_ef] statistic enable

• [Switch-behavior-city_a_ef] quit

• [Switch] traffic behavior city_a_af31

• [Switch-behavior-city_a_af31] car cir 400 pir 2000

• [Switch-behavior-city_a_af31] car city_a share

• [Switch-behavior-city_a_af31] statistic enable

• [Switch-behavior-city_a_af31] quit

CAR for this a_ef class

CAR for this a_af31 class

CAR for city_a share

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Traffic Policing - CAR

Support two types of Meter

srTCM

srTCM is mainly focus on burst of packet size

trTCM

trTCM is mainly focus on burst of packet speed

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Single-Rate Three-Color Marker

Usage: •Mark conforming traffic with a low drop precedence •Mark exceeding traffic with a high drop precedence •Drop violating traffic

Definitions: •CIR – Committed Information Rate •CBS – Committed Burst Size (max) •EBS – Excess Burst Size (max) •Tc – Current size of CBS bucket •Te – Current size of EBS bucket

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Two-Rate Three-Color Marker

Usage: • Mark packets within CIR as conforming • Mark packets between CIR and PIR as exceeding • Drop packets above the PIR

Definitions: • CIR – Committed Rate • PIR – Peak rate • CBS – Committed burst size (max) • PBS – Peak burst size (max) • Tc – Current size of CBS bucket • Tp – Current size of PBS bucket

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Traffic Policing - Meter Configuration

srTCM

qos car car-name cir cir-value [ cbs cbs-value [ pbs pbs-value ] |

pir pir-value [ cbs cbs-value pbs pbs-value ] ] – setup car

template

qos car inbound car-name – apply CAR

trTCM

car cir cir-value [ pir pir-value ] [ cbs cbs-value pbs pbs-value ] [

mode { colorblind | color-aware } ] [ green { discard | pass [

service-class class color color ] } ] [ yellow { discard | pass [

service-class class color color ] } ] [ red { discard | pass [

serviceclass class color color ] } ]

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Traffic Policing - Color design in Meter

Packet color can de defined in the Meter mechanism, such as

When burst packet size

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Traffic Policing - Remark

Can remark below key points:

DSCP // remark dscp { dscp-name | dscp-value }

802.1P // remark 8021p [ 8021p-value | inner-8021p ]

Local precedence // remark local-precedence { local-

precedence-name | local-precedence-value }[ color ]

VLAN ID

remark cvlan-id cvlan-id

remark vlan-id vlan-id

DMAC

remark destination-mac mac-address

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QoS statistics

Ingress / Egress per-traffic statistics

display traffic policy statistics { global [ slot slot-id ] | interface

interface type interface-number | vlan vlan-id } { inbound |

outbound } [ verbose { classifier base | rule-base } [ class

classifier-name ] ]

display qos queue statistics interface interface-type interface-

number

Can clean the statistics result based on per port/per queue

reset traffic policy statistics { global [ slot slot-id ] | interface

interface-type interface-number | vlan vlan-id } { inbound |

outbound }

reset qos queue statistics interface interface-type interface-

number

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Traffic Policing - Redirect

Can redirect to:

CPU

LSP

next hop

multi-hop

GRE tunnel

VPN-instance

Interface (interface, Eth-Trunk, Multi-Trunk)

Redirect to multi-hop, Eth-Trunk, Multi-Trunk is suitable for

traffic balance

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Example for Configuring Interface-based Traffic Policing

vlan batch 100 200 300 # qos car qoscar1 cir 8000 pir 10000 cbs 1000000 pbs 1250000 qos car qoscar2 cir 5000 pir 8000 cbs 625000 pbs 1000000 # interface Vlanif300 ip address 192.168.1.1 255.255.255.0 # interface GigabitEthernet1/0/1 port link-type trunk port trunk allow-pass vlan 100 qos car inbound qoscar1 # interface GigabitEthernet1/0/2 port link-type trunk port trunk allow-pass vlan 200 qos car inbound qoscar2 # interface GigabitEthernet2/0/1 port link-type trunk port trunk allow-pass vlan 100 200 300 # return

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Example for Configuring Traffic Policing Based on a Traffic Classifier

# vlan batch 100 110 120 # traffic classifier c2 operator or if-match vlan-id 110 traffic classifier c3 operator or if-match vlan-id 100 traffic classifier c1 operator or if-match vlan-id 120 #

traffic behavior b2 car cir 4000 pir 10000 cbs 500000 pbs 1250000 mode color-blind green pass yellow pass red discard remark dscp af33 statistic enable traffic behavior b3 car cir 4000 pir 10000 cbs 500000 pbs 1250000 mode color-blind green pass yellow pass red discard remark dscp af13 statistic enable traffic behavior b1 car cir 2000 pir 10000 cbs 250000 pbs 1250000 mode color-blind green pass yellow pass red discard remark dscp ef statistic enable

# traffic policy p1 classifier c1 behavior b1 classifier c2 behavior b2 classifier c3 behavior b3 # interface GigabitEthernet1/0/1 port link-type trunk port trunk allow-pass vlan 100 110 120 traffic-policy p1 inbound # interface GigabitEthernet2/0/1 port link-type trunk port trunk allow-pass vlan 100 110 120 # return

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Contents

Title 1 QOS Overview

Title 2 Mapping

Title 3 Classification, marking, and policing

Title 4 Queue shaping and scheduling

Title 5 Summary

32

Traffic Policing - shaping

Support shaping based on

Port

Queue

S9700 support 2 level shaping, first is shaping based on

queue, and then shaping on the port

Q1(100M)

Port (150M)

Q2(100M)

First shaping

Next shaping

Scenario

For traffic, first shaping based on queue of 100M, then 150M shaping

for next shaping based on port

qos queue queue-index shaping cir cir-value pir pir-value [ cbs cbs-value pbs pbs-value ]

qos lr cir cir-value [ cbs cbs-value ][ outbound ]

http://localhost:7890/pages/31185543/02/31185543/02/resources/s/qos_queue_shaping.htmlhttp://localhost:7890/pages/31185543/02/31185543/02/resources/s/qos_queue_shaping.htmlhttp://localhost:7890/pages/31185543/02/31185543/02/resources/s/qos_queue_shaping.htmlhttp://localhost:7890/pages/31185543/02/31185543/02/resources/s/qos_lr.htmlhttp://localhost:7890/pages/31185543/02/31185543/02/resources/s/qos_lr.htmlhttp://localhost:7890/pages/31185543/02/31185543/02/resources/s/qos_lr.html

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Queue Scheduling

Each port of S9700 has 8 queues

Support five types of queue scheduling

PQ

DRR

WRR

PQ+DRR

PQ+WRR

Different queues can be set to different scheduling mode

(PQ/WRR/DRR)

It will first schedule PQ queue ,and then schedule DRR or WRR

PQs scheduling is according the priority, from High->Low

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Queue scheduling configuration

WRR configuration

qos { pq | wrr | drr },-- define the queues as PQ, WRR or DRR

qos queue queue-index wrr weight weight -- define the weight

of WRR, and default weight is 1, and the weight can 1 to 64

DRR configuration

qos { pq { start-queue-index [ to end-queue-index ] } & |

{ wrr | drr } { start-queue-index [ to end-queue-index ] } &

}* -- define queues as PQ+WRR or PQ+DRR

qos queue queue-index drr weight weight -- define the weight

of DRR, and default weight is 1

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Contents

Title 1 QOS Overview

Title 2 Mapping

Title 3 Classification, marking, and policing

Title 4 Queue shaping and scheduling

Title 5 Summary

36

Summary： TOP 3 things to Know

Support 2 level CAR

Support Hierarchical Shaping (Queue & Port)

Support various types of queue scheduling, such as

PQ+WRR, PQ + DRR

Copyright©2012 Huawei Technologies Co., Ltd. All Rights Reserved. The information in this document may contain predictive statements including, without limitation, statements regarding the future financial and

operating results, future product portfolio, new technology, etc. There are a number of factors that could cause actual results and developments to

differ materially from those expressed or implied in the predictive statements. Therefore, such information is provided for reference purpose only and

constitutes neither an offer nor an acceptance. Huawei may change the information at any time without notice.

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