Cisco Router Register Configuration

Configuration purpose: The Register configuration is used to change the router startup process.

The start bit is made up of 4-bit 16-digit registers

Format: 0xABCD

Assignment range from 0x0 to 0xFFFF

0X2102: Industrial Default value

0x2142: Starting from flash, but not using the configuration file in NVRAM (for Suwa foment? LT;BR/>0x2101: Booting from boot RAM, applied to update system files

0x2141: Booting from boot RA m without using the configuration file in NVRAM

Where the third digit of the C bit is 1, the break key is turned off, whereas the break key is turned on.

0x141: Closes the break key, does not use the configuration file in Nvram, and from the system default ROM

System to boot.

0X0040: Indicates that the routing gas is allowed to read the configuration file in NVRAM.

Monitoring command Features

O: Displays the actual configured currently functioning registers in a bit form,

o Displays the virtual configuration register, currently in effect, WI

Th a description of the bits

O/R: Resets the actual configured registers to the following values:

9600 (port rate)

Whether the break is valid

Whether to ignore configuration in NVRAM

Whether to start from ROM

such as: O/R 0x2102

Table B-1 Register Configuration definition Table

位顺序 十六进制 意义　
00 to 03 0x0000 to 0x000F 启动字段　
06 0x0040 使得系统软件忽略NVRAM中的内容
07 0x0080 OEM位开启　
08 0x0100 Break键关闭
10 0x0400 IP广播到所有域
11 to 12 0x0800 to 0x1000 Console口速率
13 0x2000 如果网络启动失败，默认从ROM中启动
14 0x4000 IP broadcasts do not have net numbers　
15 0x8000 启动诊断信息同时忽略NVRAM内容(1) Industrial default register bit 0x2102. This only consists of the following parts

bit = 0x2000, bit 8 = 0x0100, and bits 00 to 03 (reference TableB-2) = 0

x0002.

Table B-2 Start for gaze (configuration register bits 00 to 03)

The meaning of starting bit

0x0: Stay in Bootstrap state after starting

0x1: Booting from ROM

0x2 to 0xF: Specifies the default boot file boot system.

Table B-3 console port rate setting table速率 12位 11位
9600 0 0　
4800 0 1　
1200 1 0　
2400 1 1