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BGP Autonomous System No....


Hi All,

One Autonomous system no (eg:1111). how many place we can use..?

eg:India, many place we can use..???

Thanks and Regard



Vasilii Mikhailovskii
Rising star
Rising star


You may use it anywhere (but you must meet routing policy requirements of ISPs you peer with).

But keep in mind, that (by default) BGP doesn't learn prefixes, those have local AS number in AS-path.

Joseph W. Doherty
Hall of Fame Master Hall of Fame Master
Hall of Fame Master
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No limit, as far as I know.  However, if you advertize the same subnet(s) to different eBGP peers, you should be able to reach the advertized IP space from those entry points.

If you peer with different AS eBGP peers, you'll probably also want to insure your AS doesn't become a transit for them.




Private autonomous system (AS) numbers which range from 64512 to 65535 are used to conserve globally unique AS numbers. Globally unique AS numbers (1 - 64511) are assigned by InterNIC

This means if ur AS falls under the private range then u can use it anywhere and many times.


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