The best practice with regards to as_path length is to have an edge filter that dumps any prefix with a length longer than say 10. Depending on the situation, might even be able to go smaller.
At a certain point, keeping that route around does nothing for you, just shoot it and ride the 0/0 train. On Fri, Mar 25, 2022 at 4:09 AM Paschal Masha <paschal.ma...@ke.wananchi.com> wrote: > :) probably the longest prepend in the world. > > A thought though, is it breaking any standard or best practice procedures? > > Regards > Paschal Masha | Engineering > Skype ID: paschal.masha > > ----- Original Message ----- > From: "Erik Sundberg" <esundb...@nitelusa.com> > To: "nanog" <nanog@nanog.org> > Sent: Friday, March 25, 2022 6:43:38 AM > Subject: DMARC ViolationAS21299 - 46.42.196.0/24 ASN prepending 255 times > > If anyone from AS21299 is lurking on Nanog. Please reduce your AS prepends > for 46.42.196.0/24 from 255 prepends to a more reasonable number of > prepends let's say 20. Thanks! > > This is a Kazakhstan register IP Block and ASN > > > > Network Next Hop Metric LocPrf Weight Path > > *> 46.42.196.0/24 x.x.x.x 0 100 0 2914 174 3216 3216 35168 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21 299 > 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 21299 > 21299 i > > > > > > > > > CONFIDENTIALITY NOTICE: This e-mail transmission, and any documents, files > or previous e-mail messages attached to it may contain confidential > information that is legally privileged. If you are not the intended > recipient, or a person responsible for delivering it to the intended > recipient, you are hereby notified that any disclosure, copying, > distribution or use of any of the information contained in or attached to > this transmission is STRICTLY PROHIBITED. If you have received this > transmission in error please notify the sender immediately by replying to > this e-mail. You must destroy the original transmission and its attachments > without reading or saving in any manner. > Thank you. > > > >