What is configuration register is 0xf?

Config-Register is basically a hexadecimal or decimal value that represents. the 16-bit configuration register value that will be used the next time the switch is. restarted. The value range is from 0x0 to 0xFFFF (0 to 65535 in decimal).

What is a configuration register?

Configuration Register is a special 16 bits value that can be configured in Cisco routers. It is mainly used in three cases; To determine how the router boots. To determine boot options.

What is the purpose of the configuration register?

The Purpose of the Configuration Register. The configuration register can be used to change router behavior in several ways, such as: how the router boots (into ROMmon, NetBoot) options while booting (ignore configuration, disable boot messages)

What is configuration register is 0x102?

The configuration register is a 16-bit virtual register that specifies boot sequence and break parameters and sets the console baud rate. 0x0001 specifies to boot from ROM. • 0x0002 to 0x000F specify to examine the configuration file in NVRAM for boot system commands.

What is Confreg 0x2142?

Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash. This step bypasses the startup configuration where the passwords are stored. The router reboots, but ignores the saved configuration. Type no after each setup question, or press Ctrl-C in order to skip the initial setup procedure.

What is true configuration register?

The Configuration Register. When a router starts up it needs to know which software to load and which configuration file to use. The way it determines these two things is by looking at its configuration register setting and its startup configuration in nonvolatile RAM (NVRAM).

Which configuration register starts the router normally?

All Cisco routers have a default configuration register setting of 0x2102, which tells the router to load the IOS from flash memory and the configuration from NVRAM. You save the configuration on a router with the copy running-config startup-config command and reboot the router.

How do I recover from ROMmon mode?

Step-by-Step Procedure

1. Either switch off or shut down the router.
2. Remove the compact flash that is on the rear of the router.
3. Switch on the router.
4. Once the router is on Rommon mode, reinsert the compact flash.
5. Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash.
6. Type reset at the rommon 2> prompt.

How do you set boot variable in Rommon mode?

The following are the ROMmon variables that Catalyt 9400 supports and examples to set them:

1. MANUAL_BOOT=yes. A value of “yes” disables auto boot and enables manual booting. A value of “no” enables auto boot.
2. DEFAULT_GATEWAY=172.27.74.1.
3. IP_ADDRESS=172.27.74.111.
4. IP_SUBNET_MASK=255.255.255.0.
5. TFTP_SERVER=172.19.64.31.

Which configuration register value will allow you to bypass the startup configuration file stored in NVRAM?

In this example, the configuration register shows 0x2142. The router bypasses the startup configuration stored in NVRAM during its boot sequence. This feature is normally used during a password recovery procedure.

Is there a configuration register that is 0xF?

– Cisco Community Solved: Hello All, I have to reload 5 switches tonight the units are WS-C2960G-24TC-L known as LANBASE switches. My question is I have always been taught the config-reg should be 0x2102, but on these switches is is 0xF, does anyone know why Cisco Find A Community Buy or Renew Find A Community Close Cisco Community English Chinese

What is the default value of configuration register?

Configuration Register 0x2102 The default value of Config Register is 0x2102. With Configuration Register 0x2102 value, the router boots from NVRAM and the normal router precedures works. The configuration stored in NVRAM is the startup configuration.

How to fix the 3750 config Register 0xf?

08-24-2009 03:49 PM The config register on the 3750 (and other desktop switches) is fixed at 0xF. It cannot be changed, but it is analogous to 0x2102 on other platforms in that it causes the switch to boot from flash, and load the saved config.text.

Is the default configuration register on a 2960 switch 0xF?

Sorry don’t have a link to hand but the default configuration register setting on the 2960 switches is indeed 0xF and this cannot be changed. So you are okay to reload the switches.