Configuration Register on All Cisco Routers

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Configuration Register on All Cisco Routers

Configuration Register Setting
Router Behavior

0x102
Ignores break
9600 console baud

0x1202
1200 baud rate

0x2101
Boots into bootstrap
Ignores break
Boots into ROM if initial boot fails
9600 console baud rate

0x2102
Ignores break
Boots into ROM if initial boot fails
9600 console baud rate default value for most platforms

0x2120
Boots into ROMmon
19200 console speed

0x2122
Ignores break
Boots into ROM if initial boot fails
19200 console baud rate

0x2124
NetBoot
Ignores break
Boots into ROM if initial boot fails
19200 console speed

0x2142
Ignores break
Boots into ROM if initial boot fails
9600 console baud rate
Ignores the contents of Non-Volatile RAM (NVRAM) (ignores configuration)

0x2902
Ignores break
Boots into ROM if initial boot fails
4800 console baud rate

0x2922
Ignores break
Boots into ROM if initial boot fails
38400 console baud rate

0x3122
Ignores break
Boots into ROM if initial boot fails
57600 console baud rate

0x3902
Ignores break
Boots into ROM if initial boot fails
2400 console baud rate

0x3922
Ignores break
Boots into ROM if initial boot fails
115200 console baud rate