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What does “Allow AS in” do in BGP?


Inbound BGP load-balancing from same ISP routerVPLS Multihoming on Junos - FEC confusion‏What happens when a BGP link is lost and then came back up?BGP - how does IGP know the right route?Network redundancy design question with BGPBGP community blackholeBGP Dual link with single ISP two different routerAutomating BGP neighborship formationBYO thoughts on BGP routingIn one organization having two ISP which configured on fortigate firewall ? How can we do the failover for internet?













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















    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






      share|improve this question















      share|improve this question













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      edited Mar 28 at 9:00









      Mike Pennington

      26.8k1166138




      26.8k1166138










      asked Mar 28 at 8:32









      skysky

      746




      746




















          1 Answer
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          6














          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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            1 Answer
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            active

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            active

            oldest

            votes






            active

            oldest

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            6














            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





























              6














              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



























                6












                6








                6







                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 Mar 28 at 14:01

























                answered Mar 28 at 8:42









                JFLJFL

                12.5k11442




                12.5k11442



























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