BGP

From ImageStream Router Documentation

Overview

Border Gateway Protocol, or BGP, dynamically controls routing traffic between networks, or Autonomous Systems. Routers setup BGP peering sessions with each other and share information about what networks connect to them directly, as well as what routes they learn from other peers. This means that if two BGP peers lose their session, the network knows this and can send traffic on an alternate path to its destination. Much of the internet uses BGP to ensure traffic flows quickly and efficiently to its destination rather than relying on human intervention to manage routes.

Tools

BGP can be difficult to troubleshoot and configure. Here are some tools to help make your life easier:

• http://webapps.imagestream.com/tools/index.php/basic_quagga - Basic Quagga configuration generator.

Examples

• Example 1:One router with two peers - Simplest practical use of BGP. One router in an AS is connected to two upstream providers.

• Example 2:Two routers with two peers - More advanced configuration using two edge routers and two connections to the internet.

Documentation and Futher reading

There quite a bit of documentation on Quagga/Zebra available.

• /Troubleshooting - Tips to help track down common problems
• /FAQ - ImageStream BGP FAQ
• /Glossary - Glossary of BGP Terms
• http://www.quagga.net/docs.php - Official Quagga documentation
• http://forum.imagestream.com/viewforum.php?f=2&sid=53e736c76c537237862c86341c0ed285 - ImageStream BGP Support Forum