Load Balancing

Introduction

Load Balancing is methology with aim to spread traffic across multiple links. This can be done one per-packet or per-connection basis.

Methods

Firewall marking

This method use firewall packet marking to select one from multiple gateways.

• Per-Traffic Load Balancing
• Load Balancing over Multiple Gateways
• Manual:Load balancing multiple same subnet links
• Improved Load Balancing over Multiple Gateways
• Improved Load Balancing over Multiple Gateways Failover Script

ECMP

This method use multiple gateway with same cost.

• ECMP load balancing with masquerade
• ECMP Failover Script
• Manual:IP/Route#Multipath (ECMP) routes

PCC

• Manual:PCC

Nth

• NTH load balancing with masquerade
• NTH load balancing with masquerade (another approach)
• Nth
• Manual:NTH in RouterOS 3.x

Bonding

• Manual:Interface/Bonding
• Bonding Examples

OSPF

Two or more links are setup with dynamic routing protocol OSPF with equal cost. Then equal multipath routing is used.

• #ECMP
• Manual:Routing/OSPF
• Manual:Route Selection Algorithm in RouterOS#Load balancing and dynamic routing protocols

BGP

• Manual:BGP Load Balancing with two interfaces
• Manual:Simple BGP Multihoming#Load_sharing_setup

External links

• wikipedia:Load balancing (computing)