Cisco – Significado dos valores de configuração do Registo

 

O proposito dos valores de configuração de registo sao para alterar o comportamento do router de varias maneiras, tais como:

  • Como faz o Boot inicial(RomMon,NetBoot);
  • Opção durante o Boot(ingora configurações, desativa as mensagens de boot);
  • Velocidade da Console(Alterar valor do Baud Rate para emulação de terminal);

Valor inicial padrão, inicia pela memoria Flash e executa as configurações da startup config : 0x2102

Em modo RomMon usar o comando :

RomMon> confreg 0x2102

Em modo priviligiado usar:

Router#>config-register 0x2102

Verificar valor do registo da configuração actual:

Router#>show version

Configuration Register SettingComportamento Router
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

Se o valor de registo que tiveres nao constar na tabela, determina que bits sao aplicados em ordem:

Bit NumberHexSignificado
00-030x0000-0x000FBoots Field Parameters:

  • 0x0000 – Stays at the system bootstrap prompt.
  • 0x0001 – Boots the first system image in onboard Flash memory (EPROM).
  • 0x0002-0x000F- Specifies a default netboot filename. Enables boot system commands that override the default netboot filename.
060x0040
  • Ignore NVRAM contents
070x0080
  • Disable boot messages
080x0100
  • Break disabled
100x0400
  • IP broadcast with all zeros
5,11,120x0020, 0x0800, 0x1000
  • Console line speed
130x2000
  • Boots default ROM software if network boot fails
140x4000
  • IP broadcasts do not have net numbers
150x8000
  • Enables diagnostic messages
  • Ignores NVRAM contents

Add a Comment