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 2 days ago









      Mike Pennington

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      asked 2 days ago









      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
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            oldest

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            active

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            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














                share|improve this answer



                share|improve this answer








                edited 2 days ago

























                answered 2 days ago









                JFLJFL

                11.9k11339




                11.9k11339






























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