Load Sharing with BGP in Single and Multihomed Environments

Load Sharing with BGP in Single and Multihomed Environments: Sample Configurations (Cisco Systems)

Load sharing allows a router to distribute the outgoing and incoming traffic among multiple paths.

By default, Border Gateway Protocol (BGP) selects only a single best path and does not perform load balancing. This document shows how to perform load sharing in different scenarios with the use of BGP.

1. Load Sharing with the Loopback Address as a BGP Neighbor
   


2. Load Sharing When Dual-Homed to One Internet Service Provider (ISP) Through a Single Local Router
   


3. Load Sharing When Dual-Homed to One ISP Through Multiple Local Routers
   
   
   


4. Load Sharing When Multihomed to Two ISPs Through Multiple Local Routers
   

Downloads:
Load Sharing with BGP in Single and Multihomed Environments: Sample Configurations (pdf)


see also:
How Does Load Balancing Work? (Cisco Systems)