まずルーターを再起動させる。 ブートメッセージが出てる間にaltとBを押す System Bootstrap, Version 12.3(8r)YH8, RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport Copyright (c) 2006 by cisco Systems, Inc. C1800 platform with 131072 Kbytes of main memory with parity disabled Upgrade ROMMON initialized alt+B ←テラタームならアルトとBを押す monitor: command "boot" aborted due to user interrupt rommon 1 > confreg 0x2142 You mu