Jim, We converted our entire 12K backbone to IOS XR, it was painful but Its been relatively stable since. Haven't seen any issues like this. What SPA are you using? Neil. -----Original Message----- From: Jim Wininger [mailto:jwininger@indianafiber.net] Sent: 13 July 2009 21:20 To: nanog@nanog.org Subject: Cisco 12000 series routers and IOS XR. Is anyone on the list running the Cisco 12000 Series routers with XR? We have a couple of these in our network and are having a few issues with them. Specifically the line cards will reboot for some unknown reason (12000-SIP-501). We recently replaced one of the cards and the new hardware (<6mo old) is doing the same thing. Anyone have issues with these routers? -- Jim Wininger No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.392 / Virus Database: 270.13.20/2249 - Release Date: 07/19/09 17:59:00