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To bring BGP session minimum requires a configuration is really simple.  Just three lines oficon_BGP.png BGP statement will bring BGP session.
This is kinds of important to know, when you are troubleshooting.  If BGP doesnt come up, just simplify BGP configuration. It is sometimes best troubleshooting steps.

 

Last Updated (Wednesday, 06 January 2010 14:44)

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Controlling inbound traffic is the most important consideration when you are configuring BGP. icon_BGP.pngIf you have more than one ISP links, definetely you need to make sure your BGP announcement is propagate to Internet. If you have only one link to the ISP, again you don't really need BGP. Simple static route statement should be taking care of your needs.
Redundancy, failover and load-balancing traffic those are few major reasons that you have multiple links to ISP. Your BGP announcement is directly affecting your inbound traffic. Yes, it kinds of confuse if you are not dealing with BGP daily basis. How you annouce your routes bring traffic on one of your uplinks.

 

Last Updated (Wednesday, 06 January 2010 14:44)

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Outbound traffic control is actually easier than you thought. If you have single ISP link, icon_BGP.pngall outbound traffic will obviously exit out the link. As I mentioned earlier, if you have single ISP link then you don't really need BGP. Probably you may have more questions, if you have more than two ISP links. Redundanacy and load-sharing would be biggest concerns.

 

 

Last Updated (Wednesday, 06 January 2010 14:43)

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In the most of cases, end-user wants to have full BGP routing table from their upstream provider.icon_BGP.png Why not! If you have enough memory on your CPE such as Router, multi-layer switch or whatever devices are connected to ISP with BGP on. Certified memory is really expensive. It is not like PC memory. In here, we are just talking about BGP routing table in IPv4 address basis.

 

 

Last Updated (Wednesday, 06 January 2010 14:43)

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In order to setup BGP, minimum requirements are IP address and ASN. Of course your router icon_BGP.pngmust support BGP routing protocol. What is ASN? It is stands for Autonomous Systems Number that is a unique number associated with an AS. The ASN is used as an identifier to allow the AS to exchange dynamic routing information between ASes.
 

 

Last Updated (Wednesday, 06 January 2010 14:42)

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