I was made aware of another bug in IOS-XR: CSCuv94859. Thanks Job and Ryan. It caused some routes with NO_EXPORT to sometimes be advertised to EBGP after an NSR switchover during a software upgrade. It was fixed in 2015. Regards, Jakob. -----Original Message----- From: Jakob Heitz (jheitz) Sent: Tuesday, August 4, 2020 10:24 AM To: nanog@nanog.org Subject: Re: Issue with Noction IRP default setting (Was: BGP route hijack by AS10990) CSCdj01351. Fixed in 1997. Regards, Jakob. -----Original Message----- Date: Sat, 1 Aug 2020 13:29:59 -0700 From: Ryan Hamel <ryan@rkhtech.org> ... Also, wasn't it you that said Cisco routers had a bug in ignoring NO_EXPORT? ...