>i wanna boot the switch with EWA6 ios , but >even i used boot system comman d, switch still >boots from first image(SG.bin). Try this: config-register 0x2102 boot system flash bootflash:cat4000-i9s-mz.122-25.EWA6.bin -- Regards Christian Bering IP engineer, nianet a/s Phone: (+45) 7020 8730