Hi All, I have found on Cisco website the Suggested version of Cisco IOS XR is 5.3.4 but the latest version is 6.1.3. Basically, my router will perform as edge router that need BGP, VRF, and Policer. Could you please advise which one is the stable version of Cisco IOS XR? Thanks for your sharing in advance. Regards, Try Chhay