Introducción a Performance Routing - cisco.com · ©2008 Cisco Systems, Inc. All rights reserved....

© 2008 Cisco Systems, Inc. All rights reserved. Cisco PublicBRKRST-236114342_04_2008_c1 1

Introducción a Performance Routing

Mayo 14, 2009

Presentador: Ramón Romero

Systems Engineer

© 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 2BRKRST-236114342_04_2008_c1

Agenda

� Challenge and Solution

� PfR Overview

� Design Considerations

� Product Overview

� Conclusion

� Questions and Answers

� Links


What Is Cisco Performance Routing?

� Performance-based adaptive routing

� Application best path selection

� Network problem mitigation

Cisco Performance Routing (PfR)


Network Performance Challenge

� Network availability

Blackouts

Brownouts

Congestion

� WAN performance

Best path not alwaysbest performing path

� Load distribution

Over and underused links

� Cost management

Need to control or limit transport cost

“The Network Is Up, but Are Applications Working?”

ISPA

ISPB

ISPC

ISPD

ISPFISPG

Internet

$$$$$$$

MPLS

ATM

Frame Relay

ISPE


Application Reachability and Performance

� How to manage application reachability and performance in the network?

� Network availability

Redundant devices: HSRP

Redundant interfaces: NSF, SSO, EOT, EEM

Redundant paths: equal cost routing, MPLS

� Network performance

Shortest hop/hot potato routing (BGP, RIP, etc.)

Least cost routing (OSPF, EIGRP, etc.)

MPLS TE, MTR, queuing, etc.

� Necessary…but not sufficient

� Is application reachable ?

� Is application performing ?


But, Are the Applications Performing Adequately?

Headquarters

Branch Office

Small Office

Two PathsTwo Providers

E-Mail

WAN Availability

Enterprise WAN Challenge

MPLS

ATM

FR

Internet VPN


Internet Availability

But, Is the User Experience a Good One?

Multiple ISPs

Internet Presence Challenge

� Online banking

� E-mail hosting

� Online ticketing

� Instant messaging

� Online catalog

� News/weather

� Internet voice

� Application hosting

� DNS

� Online music

� Online video

ISPA

ISPB

ISPC

ISPD

ISPE

ISPF ISPG

InternetIM

ISP1

ISP2

www.foo.com

Web

E-Mail


Customer Problems

� Soft error detection

Issue

All network destinations are reachable, yet the network is slow

Why?

Could be caused by brownouts, congestion, network device anomaly, service provider

PfR solution

Detect packet loss: report and route-around problem area

Detect excessive delay: report and reroute to lower delay path

Detect black hole routing: report and route around

� Resource utilization

Issue

Under utilized circuits and equipment; management wants to leverage all network facilities

Why?

Minimize impact of failure

Full utilization of expensive network resources; equipment and circuits

PfR solution

Detect multiple links and intelligently distribute the traffic based upon load and/or cost $


Customer Problems

� Application awarenessIssue

My application requires a very responsive network

Why?

The application is very sensitive to delay (Live Multimedia, ERP, SQL, etc.)

PfR solution

Forward different applications/services based upon advanced criteria; delay, jitter, MOS, loss, etc.

� Profile network performanceIssue

A new application is available and we’re not sure the network can accommodate the application performance requirements

Why?

Don’t know the network traffic profile

PfR solution

Audit of the network performance including:

Applications, throughput, links available, and performance

Core Traffic Matrix view

Provide a longer term view of network capability (“future proofing”)


How to Verify Application Performance

� Is destination network reachable?Traditional IP Routing

Performance Routing

� Is application reachable?

� Is application performing?

� Are my network resource fully utilized?


Cisco Performance Routing (PfR)

� Cisco PfR enhances routing in order to select the best path based on user defined policy

� The PfR policy can: minimize cost, efficiently distribute traffic load, and/or select the optimum performing path for applications

� Cisco PfR enables intelligent traffic management that can dynamically route around soft errors in the Enterprise WAN or Internet

� Cisco PfR makes adaptive routing adjustments based on advanced criteria

Response time, packet loss, jitter, mean opinion score (MOS), availability, traffic load, and cost $ policies


Agenda


� PfR Overview



� Conclusion


� Links


How to Verify Application Performance?

� Is prefix reachable?

Examine routing information

� Is application reachable?

Application bidirectional traffic

� Is application performing?

Round-trip time

One-way delay

Loss

Jitter/MOS

Throughput


What Is It?

� Learn prefixes, e.g., 172.128.0.0/16

� Learn applications, e.g., 172.128.0.0/16 Port 88 DSCP EF

� Learn traffic with highest throughput or delay

� Automatically delete traffic if not relearned

� Repeat the process periodically

� Filter certain kind of traffic to be learned

� Aggregate learned applications on user specified keys


ISP1/WAN1

ISP2/WAN2

PfR Component Descriptions

� Master Controller (MC)

Cisco IOS® software feature

Apply policy, verification, reporting

Standalone or collocated with BR

No routing protocol required

No packet forwarding/inspection required

� Border Router (BR)

Cisco IOS software feature in forwarding router

Learn, measure, enforcement

Uses embedded Cisco IOS technologies

MC

BR

BR


Solution Topologies

Components

� BR: Border Router (forwarding path)

� MC: Master Controller (decision maker)

Branch Office

Headquarters/Data Centers

ISP1/WAN1

ISP2/WAN2

BR

MC/BR

MC/BR

MC

ISP1/WAN1

ISP2/WAN2

BR

BR

Small Office

ISP1

WAN


BR2

Command

Response

Information Flow

� MC controls all operation

Issues commands to BRs

Contains traffic class/link data

Reports events

Reports measurements

Makes policy decisions

� BR responds to MC commands

Sends responses to MC

Uses embedded Cisco IOS technology

Measures traffic class performance

Measures link performance

Enforces performance-based routing

BR1

MC


Learning: How Does It Work?

Write Prefixes To MC Database

MCLearn: Based on Highest Throughput for 10 Minutes, Filter UDP Traffic

1

DB

3

Here Is the List of Highest Throughput Prefixes in the Last 10 Minutes2

BR2

BR1


Specifying PfR Traffic Classes

Required: Destination PrefixOptional: Src Pfx, Protocol, Ports, DSCP, Application ID

10.1.1.0/24 nbar TRP20.1.1.0/24 nbar citrix

Dynamic Recognition

10.1.1.0/24 telnet20.1.0.0/16 ssh

Well-Known

10.1.1.0/24 dscp ef10.1.1.0/24 dst-port 50

ACL

Application

10.0.0.0/820.1.1.0/24

Destination Prefix

ExampleTraffic Class Type

12.4(20)T


Selecting “Best” Traffic Class Path

2015040%Serial4

3211960%Serial3

3011350%Serial2

3010089%Serial1

Jitter (ms)Priority 2

Delay (ms)Priority 1

UtilizationLink


Performance Routing (PfR)Enterprise WAN Design

Branch Office

WAN Access Links Are Biggest End-to-End Bottleneck

Traffic Optimize by: Reachability, Delay, Loss, Jitter,

MOS, Throughput, Load, and/or $Cost

Small Office

Headquarters

BottlenecksMCBR

BR

BR

MC/BR

MC/BRISP A ISP B ISP C

By Default Best Path Based on Lowest Metric, Cost, or Hops

MPLS orPrimary ISP

PfR Components

� BR: Border Router

� MC: Master Controller


Enterprise VPN DeploymentOptimize Voice Traffic

� Voice quality is based upon the Mean Opinion Score (MOS)

� MOS is calculated with jitter, delay, and loss measurements

� Cisco PfR will select the path for voice over IP (VoIP) with highest percentage MOS

Tunnel0

Headquarters

Remote Office

MC/BR

Tunnel1

MOS in Policy 80 Percent of Time

MOS in Policy 95 Percent of Time

BR/CE

BR/CE

BR

MC

Tunnel1

Tunnel0

Internet

ISP1

ISP2


Cisco PfR and Cisco WAAS IntegrationAdaptive WAN-Optimized Network

� Cisco Wide Area Application Services (WAAS) optimizes the TCP session

� Cisco PfR monitors and optimizes WAN path selection

� Cisco WAAS network transparency allows individualized session placement by Cisco PfR over best WAN path

Cisco WAE

Cisco WAE

Client

Branch Office

PfR Master Controller (MC)and Border Router (BR)

Data Center

ServersBR

Cisco WAE

Cisco PfR Domain

Cisco PfR Places SQL Traffic on Best Performing WAN Path

BR

MC

BR

IPSec over Internet

MPLS-VPN


Agenda


� PfR Overview



� Conclusion


� Links


Design Questions

1. Do I have redundant WAN connections?

Internet, IPSec/GRE, MPLS, ATM, Frame Relay

Configure as PfR external interfaces

2. Which routers terminate the WAN?

These are PfR border routers

3. What routing protocols over WAN?

BGP, static covered by PfR

EIGRP, OSPF requires static route cfg

4. Which router is PfR master controller?

> 5000 prefixes, dedicated 7200 NPE-G2

Up to 5000 prefixes, dedicated 7200 or 3800 MC

For a 100s prefixes, configure MC on BR


Design Questions

5. What policy is important?

Traffic class exit performance

Delay, loss, reachability, throughput

Jitter, MOS

Traffic class entrance performance: 12.4T

Delay, loss, reachability, throughput

External interface load distribution

Cost minimization

Backup

Path discovery

Security

Default priority is performance then load


Design Questions

6. Determine interesting traffic by:

Configure prefix

Configure TCP/UDP port

Configure full ACL (src IP, dst port, src port)

Learn Interesting prefixes

Learn Interesting traffic classes

Learn eBGP advertised prefixes

Learn applications (audio, video, SAP, Citrix, etc.)


Eth9/0 Cable

Eth12/0 DSL

MC/BR

Eth8/0

Given Cable and DSL with NAT Overload

SOHO/Broadband Deployment

1. Cable and DSL WAN interfaces

Eth8/0: PfR internal

Eth9/0: PfR external

Eth12/0: PfR external

2. ISR router terminates WAN

ISR (18xx, 28xx, 38xx,) is PfR BR

3. Static default routing

4. 10 to 100 prefixes

ISR is also MC

12.4

5. Performance is most important

Use PfR default policy

6. Learn throughput to get prefixes

BR: Border Router; MC: Master Controller


Internet Presence Deployment

1. DS3 interfaces

Ser12/0, Ser13/0, etc.

2. 7600, 6500, 7200, 3800 terminates WAN

3. BGP routing

BRs must be iBGP peers

Default routing

Partial routes

Full routes

4. 5000 prefixes

12.4

12.4T for entrance optimization

5. Customers differ on policy priority

6. Learn prefixes by throughput and delay

Same PfR Configuration for All

E-mail

MC

BR

BR

BR: Border Router; MC: Master Controller

Web

IM


Agenda


� PfR Overview



� Conclusion


� Links


PfR Typical Scenarios

� Large, medium, and small enterprises with mission-critical Internet presence

� Enterprises with redundant WAN networks

� Enterprises with remote offices

� Home office with dual internet connections

Headquarters

Telecommuter

Remote Office


OER/PfR Cisco IOS Support

� Released in 12.3(8)T (May 17, 2004)

� 12.4

Prefix optimization

� 12.4T

Traffic class optimization

Entrance selection

Voice optimization

Application Routing

� 12.2(33)SRB: 7600

� 12.2(33)SXH: Cisco Catalyst® 6000 Series

MC

BR


Advanced Enterprise Services

Advanced IP Services Enterprise Services

IP Base

Enterprise BaseSP ServicesAdvanced Security

IP Voice

PfR

PfR

PfRPfR

Cisco IOS Packaging: Routers


PfR Platform Support

Cisco 1800 ISR

Cisco 2800 ISR

Cisco 3800 ISR

Cisco 7200, 7301

Cisco Catalyst 6500

Cisco 7600


Agenda


� PfR Overview



� Conclusion


� Links


Benefits of Cisco Performance Routing

� Performance-aware network

Best path continuously reevaluated based upon network performance data: delay, loss, load, etc.

� Increased application availability

Route around at first sign of (soft error) trouble

� Minimize cost with advanced load balancing

Link usage

Circuit cost

Inbound and outbound Internet presence


Benefits of Cisco Performance Routing

� Troubleshooting

Provides network soft error fault detection

� Ease of provisioning and management

Provisioning of network policies instead of device policies

A network or system view of application performance

� Capacity planning: frequency of policy violations

Can the network maintain adequate performance?

Are links able to meet regular and peak traffic demands?


Agenda


� PfR Overview



� Conclusion


� Links


Questions and Answers


Agenda


� PfR Overview

� Deployment



� Conclusion

� Links


More Information

� PfR CCO

www.cisco.com/go/pfr/

� Cisco IOS Software Release 12.3 12.4 12.4T

www.cisco.com/go/release124t/

� Cisco IOS Software Release 12.2(33)SRB, 12.2(33)SXH

www.cisco.com/go/release/


Introducción a Performance Routing - cisco.com · ©2008 Cisco Systems, Inc. All rights reserved....

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Transcript of Introducción a Performance Routing - cisco.com · ©2008 Cisco Systems, Inc. All rights reserved....