BGP Question from Ciscopress book

happy420goluckyhappy420golucky Member Posts: 78 ■■□□□□□□□□
Hello everybody, I am sitting here reading my Cisco press book and had a question that just could not be answered.

So if anyone has "CCNP-BSCI 642-901" please look at page 403 -Receiving routing information from the internet.

In this portion of BGP they talk about accepting only default routes from all providers. In my mind I am thinking one of my ISP's router has a route= Example 0.0.0. 0.0.0.0 fa0/1 or 22.6.21.1 to my network. Am I thinking this correctly? It really doesn't make sense to me why an ISP would do that. I would think that it would use its default route out to say an ATM node or whatever their higher level tier would be.

Just to clarify this, I do understand the purpose of providing a deafault route towards an ISP, just a bit confused on how and ISP configures their routes towards me.

Thanks for your response and input ahead of time
Every passing minute is a chance to turn it all around.

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