BGP – Transit AS

In the previous blog, we discussed, how to configure weight attribute. Now when I started to prepare the design for the next attribute, I felt that, let’s first clear about transit AS.

By default, eBGP peers share all routes/prefixes with each other. In the above example, considering AS-7090, ISP1 and ISP2 will share all routes with AS-7090. In this situation ISP1 and ISP2 can route the traffic via AS-7090, becoming AS-7090 as a Transit AS.BGP Attributes 2 - Local Preference.001

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