How do I change the Confreg on a Cisco switch?

To change the configuration register settings from the Cisco IOS CLI, complete the following steps:

1. Connect a terminal or PC to the router console port.
2. Configure your terminal or terminal emulation software for 9600 baud (default), 8 data bits, no parity, and 2 stop bits.
3. Power on the router.

What does the Confreg command do?

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) console speed (baud rate for a terminal emulation session)

What is Confreg?

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.

How do I change the hostname on a Cisco switch?

Renaming a Cisco IP switch

1. Enter global configuration mode: configure terminal.
2. Rename the switch: switchname new-switch-name.
3. Exit configuration mode: exit.
4. Copy the current running configuration to the startup configuration file:
5. Verify that the switch name change is visible from the ONTAP cluster prompt.

How do I boot a Cisco switch into Rommon mode?

If the switch continuously reboots, press Control-C to prevent autoboot and to get into ROMmon mode.

How do you enter Rommon mode?

To manually boot into the ROMmon mode, you will need to reboot the device and break the boot sequence. Pressing the Ctrl+Break key combination during boot usually does this.

How do you enter ROMmon mode?

What is ip Domain Name Cisco command?

“ip domain name” specifies the domain name of the cisco device itself. One of the things this is used for is security certificate generation for IPSEC, SSH or HTTPS access. The certificate will be generated using the entries you put in for hostname and domain name.

How do I reset a Cisco switch?

Hold the “mode” button on the front of the switch for 10 seconds. The lights will blink then go solid – the switch completely wipes all configuration and then reboots.

What is Cisco Rommon mode?

The ROM Monitor (ROMMON) is a bootstrap program that initializes the hardware and boots the Cisco IOS XE software when you power on or reload a router. If your router does not find a valid system image to load when it is booting, the system enters the ROMMON mode.

Why is the configuration register 0xf on Cisco switches?

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 has changed this and if so where I might be able to find a document describing this change?

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.

What is the default IP address for a Cisco switch?

The switch makes DHCP and RARP requests only if the sc0 interface IP address is set to 0.0.0.0 when the switch boots up. This address is the default for a new switch or a switch whose configuration file has been cleared using the clear config all command.

Why is password recovery-confreg 0x2142 doesn’t work?

If you see that the router configuration is still present (still previous hostname), it indicates that the configuration register was not changed to 0x2142 in time prior to the crash. If this is the case, start over again (Step 4).