On 2010-02-10, Ivo Chutkin <[email protected]> wrote: > Hello misc, > > Would the following filter work? > > match to $my_upstream_1 source-as {some_as} set prepend-self 4 > > I would like to prepend my as to make as path longer for "some_as" > trough my_upstream_1 and make it to prefer path trough my_upstream_2. > It does not produce error with bgpd-n but there is no effect as well.
Are you certain it has no effect (and how?) - you can't rely on AS path prepending to change how traffic flows, if someone gives you a higher localpref they'll use that path irrespective of the path length.
