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BGP attributes are used to condition the uplinnk and downlink traffic on an established BGP session .
To establish neighborship between 2 routers we need network layer reachability between 2 BGP speaking routers and we have to add each other router ID/address and AS number under BGP confi mode on each router .
Note : AS path attribute is not help here because it used in best path selection once BGP came up between to neighbor.
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