Hi all, referring to this doc
under bgp deterministic med... it said that the order in which paths are recieved also affect the selection process, i didnt understand how ?, suppose a bgp router receives a path to destination with local pref of 100. then after some time it recieves path to same destination from a different neighbour with local pref of 200, so wont it change the best path to new one ?
Can you kindly guide me in this !
I can see your confusion if you depend on only that document to clear things up for you. This is why I am providing you with the following supplement. See below.
In a nutshell, what they are saying is that the order in which the paths for the same prefix are received by a router can effect the best-path selection for MED-BASED path selection.
In other words, they are referring to the situation in which none of the higher precedence BGP attributes is configured. Or the default values exist. Therefore, the best path selection will boil down to executing a MED comparison and the path with the lowest MED will be selected as the best path. And it is in that SPECIFIC circumstance that the order in which prefxies are received can alter the best path selection.
Lastly, the reason why the order in which the routes are received effects the MED comparison is explained in the document below.