D-Link TSD 2009 workshop 1 Outbound Route Load Balancing.

D-Link TSD 2009 workshop

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Outbound Route Load Balancing


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Outbound Route Load Balancing

•Overview

•What is Outbound Route Load Balancing

•How to deploy the RLB Function

•RLB Behaviors

•RLB Algorithms

Hands-on

•Setting and debugging

Q&A

Outline


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What is Outbound Route Load Balancing ?

Outbound Route Load Balancing is the ability to distribute traffic over multiple routes based on a number of predefined distribution algorithms.

ISP1 ISP2

WAN1 WAN2

0.0.0.0/0 wan1 , Metric=10

0.0.0.0/0 wan2 , Metric=20

MAIN Routing Table

GoogleGoogleGoogleGoogle


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How to deploy Outbound RLB

Manual add identical routing entries.

Enable RLB.


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Manually add identical routing entries for RLB.

ISP2

WAN1:

IP:1.1.1.1/24

GW:1.1.1.2

WAN2:

IP:3.3.3.1/24

GW:3.3.3.2

ISP1


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Enable RLB.


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Outbound RLB behaviors

RLB engine auto lookup the identical routing entries.

RLB engine grouping the identical routing entries into RLB engine.

RLB engine using specify algorithm to design traffic go which way.

Outbound RLB Flowchart


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Auto lookup the identical routing entries in the routing table.

Identical routing entires

Identical routing entries


Outbound RLB Engine

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Grouping the identical destination routing entries into RLB engine.

Group 1

Group 2


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Using specified algorithm to design traffic go which way.

ISP1

ISP2

WAN1

WAN2

GoogleGoogleGoogleGoogle

RLB Group

RLB


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Outbound RLB Flowchart

Outgoing traffic

Lookup dst-network in main

routing table

Matching RLB routing entries

Yes

No

Yes

Dropped by “Default Access Rule”

NoRLB

Algorithm

WAN1

WAN2

Interface

src_IP src-_IF destination dest-_IF

192.168.1.9 lan1 http://google

Outbound Route Load Balancing Engine

WAN1 or WAN2


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Outbound Route Load Balancing Algorithms

Round Robin Algorithm

Destination Algorithm

Spillover Algorithm


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Round Robin AlgorithmSuccessive routes are chosen from the matching routes in a Randomly.

If the matching routes have unequal metric, then routes with lower metric are triggered more often.

Outgoing traffic

RLB Round Robin Algorithm

MAIN

Routing Table

M=10

M=10

WAN1

WAN2M=20


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The restriction Of Round Robin Algorithm

RLB Round Robin Algorithm

M=10

M=10

WAN1

WAN2M=20SSL ServerSSL Client


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Destination AlgorithmDestination is similar to Round Robin, but provides the “stickiness”

The unique destination IP addresses always get the same route from a lookup

Outgoing traffic

RLB Destination Algorithm

MAIN

Routing Table

M=10

M=10

WAN1

WAN2

Destination Stickiness Table 1. Face book wan22. Google wan1

Google

Face book

To Google

To Face Book

To Face BookTo

Google


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Destination AlgorithmHow to setup the Round Robin and Destination Algorithms


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Spillover AlgorithmThe first matching route's interface is repeatedly used until the Spillover Limits of that route's interface are exceeded for the Hold Timer.

Outgoing traffic

RLB Spillover Algorithm

MAIN

Routing Table

M=10

M=20

WAN1

WAN2

Spillover Parameters* Utilization Limit: 1Mbps* Hold Time: 10 Seconds


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Spillover Algorithm

How to setup the spillover algorithm


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Spillover Algorithm

How to setup the spillover algorithm


Hands On

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Example of Route Load Balancing

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ISP1 ISP2

WAN1:

IP:1.1.1.1/24

GW:1.1.1.2

PC1: 192.168.1.50

LAN: 192.168.1.1/24

PC2: 192.168.1.101

WAN2:

IP:3.3.3.1/24

GW:3.3.3.2

HTTP/FTP server5.5.5.5

Objective:

1. There are two Internet links, ISP1 and ISP2. All traffic is outgoing via ISP1 and ISP2 load balancing.

2. Try to configure the RLB instance objects to Round Robin/Destination/Spillover , to check what’s difference between each other.



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1 Set the object of IP4 address 2 Add two default route



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3 Add wan1, wan2 Interface Group

4 Add a IP-Rule entry



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5 Add a Round Robin or Destination Route Load Balancing Instance. Check the RLB status.



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6 Add a Spillover Load Balancing Instance



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7 Add a Spillover Settings


Thank you

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D-Link TSD 2009 workshop 1 Outbound Route Load Balancing.

Documents

Transcript of D-Link TSD 2009 workshop 1 Outbound Route Load Balancing.