From version 6.3.1, IOS XR supports "if community length" in route-policy. Regards, Jakob. -----Original Message----- Date: Fri, 17 Apr 2020 12:29:33 +0100 From: <adamv0025@netconsultings.com> On the point of as-path length limit, Yes I know of at least one tier-1 that does it and since I left some 8 years back I do it everywhere I go. In addition to the above (best common practice, id' say) -on junos you can do community length limiting -and on cisco you can do attribute filtering -hence my question to this forum some time back about whether folks do filter all the "experiments" for the sake of running a successful business (paraphrasing...) adam