On Tuesday, May 29, 2012 5:29 PM, Randy Bush <mailto:[email protected]> wrote:
>> AS_PATH is used to specify the path that the payload takes. > > really? i thought it was a routing loop detection mechanism. > it's been a while since folk wrote research papers describing > schemes for routing by AS. > > i would phrase it as > > AS_PATH specifies the ASs through which the routing announcement has > passed. > >> Signed_AS_PATH is to verify the path that the update message takes. > > and then this works really nicely. > >> There is no reason they can not be different. > > and here i thought that detecting that they differ, as an attack, is > the core goal of as-path validation. I thought it was to prevent an AS from announcing an update that it was not authorised to. An entirely different thing. > > randy -- Jakob Heitz. _______________________________________________ sidr mailing list [email protected] https://www.ietf.org/mailman/listinfo/sidr
