is the list of AS's that a route traverses in pursuit of a destination... the number of the AS that originated the route is at the beginning of the list... each AS traversed prepends it's AS number to the update... this means that each AS adds it's number next on the list such that reading the list in reverse will follow the path back to the originator...
as-path ensures a loop free environment because if a router receives a route with it's own AS in the as-path attribute, it drops the route...
AS numbers are prepended only by EBGP neighbors. IBGP routers do not change the path attribute...
i did not make this shit up...
bgp is a next hop routing protocol, only the next hop is not a router, the next hop is an AS...
this makes the next hop for the EBGP the ip address of the neighbor that sent the update...
network cisco ccna gns3 certification arteq
a network runs through it
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