编辑 - 解决方案是在新格式化的闪存卡上使用不同的 IOS 版本。由于 IOS 不匹配，这会强制配置退出路由器。从这里开始，您将可以自由地进行任何配置，因为路由器将被擦除。
我正在尝试恢复我的 2911 路由器。我擦除了它的配置，它又回来要求输入启用密码。它应该有 cisco/cisco 密码，并且应该让您可以选择更改它们。好像这被跳过了。我认为这没什么大不了的，但它似乎已经有效地阻止了我的路由器。移除闪存会导致启动循环，如下所示：
System Bootstrap, Version 15.0(1r)M14, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2011 by cisco Systems, Inc.
Total memory size = 512 MB - On-board = 512 MB, DIMM0 = 0 MB
Field Upgradeable ROMMON Integri_________________
ROM: Digitally Signed Release Software
CISCO2911/K9 platform with 524288 Kbytes of main memory
Main memory is configured to 72/-1(On-board/DIMM0) bit mode with ECC enabled
Upgrade ROMMON initialized
PASSWORD RECOVERY FUNCTIONALITY IS DISABLED
Compact Flash0: Not present
System Bootstrap, Version 15.0(1r)M14, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2011 by cisco Systems, Inc.
Total memory size = 512 MB - On-board = 512 MB, DIMM0 = 0 MB
Field Upgradeable ROMMON Integri_________________
ROM: Digitally Signed Release Software
CISCO2911/K9 platform with 524288 Kbytes of main memory
Main memory is configured to 72/-1(On-board/DIMM0) bit mode with ECC enabled
Upgrade ROMMON initialized
PASSWORD RECOVERY FUNCTIONALITY IS DISABLED
Compact Flash1: Not present
System Bootstrap, Version 15.0(1r)M14, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2011 by cisco Systems, Inc.
Total memory size = 512 MB - On-board = 512 MB, DIMM0 = 0 MB
Field Upgradeable ROMMON Integri_________________
ROM: Digitally Signed Release Software
CISCO2911/K9 platform with 524288 Kbytes of main memory
Main memory is configured to 72/-1(On-board/DIMM0) bit mode with ECC enabled
Upgrade ROMMON initialized
PASSWORD RECOVERY FUNCTIONALITY IS DISABLED
Compact Flash0: Not present
也试图在启动时打破似乎没有做任何事情。我正在使用腻子，中断顺序应该是 Ctrl/Break。查看 putty 的日志显示它实际上是在发送中断序列。
如果我允许路由器启动，它将尝试 tftp 到 255.255.255.255 地址，这清楚地表明它没有配置。我的问题是是否有办法重置路由器，或者是否有一个配置文件可以放到闪存上，允许我启动到实际配置。
与往常一样，非常感谢任何帮助。
非常恭敬，
亚当沃克