What does “Allow AS in” do in BGP?












4















When configure BGP in a SDN product, i saw there is an option to enable "Allow as in", could anyone know what is it!










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    4















    When configure BGP in a SDN product, i saw there is an option to enable "Allow as in", could anyone know what is it!










    share|improve this question



























      4












      4








      4








      When configure BGP in a SDN product, i saw there is an option to enable "Allow as in", could anyone know what is it!










      share|improve this question
















      When configure BGP in a SDN product, i saw there is an option to enable "Allow as in", could anyone know what is it!







      bgp






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      edited Mar 28 at 9:00









      Mike Pennington

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      asked Mar 28 at 8:32









      skysky

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          This is to accept the routes which contains your own AS number. By default such routes are filtered.



          If you have a single site and different providers you do not want such routes, because, among other reasons, it could cause a routing loop, or cause your traffic to go through the Internet rather than through your internal network.



          But if you announce different networks on different sites then in order to receive routes for your other sites, you need to accept those routes, and so to configure allow AS in






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            1 Answer
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            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            5














            This is to accept the routes which contains your own AS number. By default such routes are filtered.



            If you have a single site and different providers you do not want such routes, because, among other reasons, it could cause a routing loop, or cause your traffic to go through the Internet rather than through your internal network.



            But if you announce different networks on different sites then in order to receive routes for your other sites, you need to accept those routes, and so to configure allow AS in






            share|improve this answer






























              5














              This is to accept the routes which contains your own AS number. By default such routes are filtered.



              If you have a single site and different providers you do not want such routes, because, among other reasons, it could cause a routing loop, or cause your traffic to go through the Internet rather than through your internal network.



              But if you announce different networks on different sites then in order to receive routes for your other sites, you need to accept those routes, and so to configure allow AS in






              share|improve this answer




























                5












                5








                5







                This is to accept the routes which contains your own AS number. By default such routes are filtered.



                If you have a single site and different providers you do not want such routes, because, among other reasons, it could cause a routing loop, or cause your traffic to go through the Internet rather than through your internal network.



                But if you announce different networks on different sites then in order to receive routes for your other sites, you need to accept those routes, and so to configure allow AS in






                share|improve this answer















                This is to accept the routes which contains your own AS number. By default such routes are filtered.



                If you have a single site and different providers you do not want such routes, because, among other reasons, it could cause a routing loop, or cause your traffic to go through the Internet rather than through your internal network.



                But if you announce different networks on different sites then in order to receive routes for your other sites, you need to accept those routes, and so to configure allow AS in







                share|improve this answer














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                share|improve this answer








                edited Mar 28 at 14:01

























                answered Mar 28 at 8:42









                JFLJFL

                11.9k11339




                11.9k11339






























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