Hi All, Sorry to bother you all but I have a question that has many different answers and I would prefer an experts view rather than just mine. Overview, AS xyz (to protect the innocent) # xyz has many routes associated with it and these are places within the 'router bgp xyz' statement (1) # xyz also has PI address space for other companies (2) # xyz also provides transit for other companies with their own AS numbers (3) xyz run RR to the CPE that run EBGP for the none xyz PI -with AS number - (3) routes xyz only have 1 upstream - multiple router and connections to the other AS what I would like to know - and your opinions behind this - is it better to have an AS access path list (on our upstream conection) and then filter what you announce to xyz upstream or would you just pass the whole EBGP table to xyz upstream. xyz do filter what they acept from their customers - so reduced chance of getting a routing 'swamp' I would like to understand with the idea of route flapping, dampening etc. Richard Smith IP Network Services Manager Colt Telecom ********************************************************************** COLT Telecommunications Registered in England No. 2452736 Registered Office: Bishopsgate Court, 4 Norton Folgate, London E1 6DQ Tel. 020 7390 3900 This message is subject to and does not create or vary any contractual relationship between COLT Telecommunications, its subsidiaries or affiliates ("COLT") and you. Internet communications are not secure and therefore COLT does not accept legal responsibility for the contents of this message. Any view or opinions expressed are those of the author. The message is intended for the addressee only and its contents and any attached files are strictly confidential. If you have received it in error, please telephone the number above. Thank you. **********************************************************************