i am trying to configure as-et with bgp aggregation but sounds somthing missing
in the attached topology
R0 AS 1
R1 AS 10
R2 as 20
i have advertised route from R1 then aggregate it
normally apear in all peers
als i did advertised a route in R2 THEN i aggregated this route in R1
this way R2 recive this aggregate as well
with as set i put it as 20 in the aggregate this way i blocked the summary from being seen by AS 20 only nice
the problem is
if i am tring to block the summary route advertised and aggregated in R1 useing as-et i get the whole summary route droped from R1 routing table and from others as well !! why?
in R1 i have the summary 126.96.36.199/16
now i blocked this summry from being sent to R2 but R0 now leaking the summry to R2
what i am trying to do is to add as 20 to the summary route this way even if R0 will leak it R2 will drop becuase it will see its AS in the as path of the summry route logical good
i did the following and the route get droped from the source R1 where i did the config and the summary and advertisment !!
i as-path access-list 1 permit ^20$
match as-path 1
Router bgp 10
aggregate-address 188.8.131.52 255.255.0.0 summary-only as-set advertise-map map1
then after this the route /16 disapear ???
note: i just need it like this is for study perpuses not a practical case