after bgp session are UP.I configured the CoPP to drop 10.3.3.3 bgp traffic (R3). R3 bgp traffic that matched the ACL 100 is dropped and the state is in IDLE -------------------------------------------- access-list 100 permit tcp host 10.3.3.3 any eq bgp access-list 100 permit tcp host 10.3.3.3 eq bgp any ! class-map match-all class-bgp match access-group 100 ! policy-map policy-bgp class class-bgp drop ! control-plane service-policy input policy-bgp ! The 10.3.3.3 neighbor goes to IDLE