1. the router print repeat in console, and said: Boot Image validation: Boot response retry2. Go into common mode, dir and ls print: ls/dir: Cannot open current directory - No Mapping3. i saw another discussion can solved this issue but i didn't know...

Dear experts,   I have a question about XRv 9000 software release. I can see there are release notes for 6.3.1 and even 6.4.1   https://www.cisco.com/c/en/us/td/docs/routers/virtual-routers/xrv9k-64x/general/release/notes/b-release-notes-xrv9000-641....