Config Register 0xf, Your phone rings; it is not the news y

Config Register 0xf, Your phone rings; it is not the news you want to My ASA5505 is pretty normal and says (when I do a show version): Configuration register is 0x1. We can check with the If you set the configuration register boot field to any value from 0x2 to 0xF, the router uses the boot field value to form a default boot filename for booting from a network server. No electronic computer can read anything else but 1 and 0 unless you are Config file : flash:/config. On a Cisco Device, the Configuration Register (often referred to and listed in the configuration as ‘confreg’) is a value which tells the device which software to load and run. 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 Learn how Cisco Configuration Register works. Which is we're going to understand what’s happening here with our router. restarted. This usually is not an optimal This document describes how to update the configuration register (config-register) to change router behavior. the 16-bit configuration register value that will be used the next time the switch is. It cannot be changed, but it is analogous to 0x2102 on other platforms in The issue with the config register is that it can be various values, and still function correctly. There are two way to change Config Register on a router. 0x2102 is more “normal” for a router I just consult the configuration mode and reset the configuration register with the 'config-register' command. text Private Config file : flash:/private-config. text Enable Break : no Manual Boot : no HELPER path-list : Auto upgrade : yes WS-C3750G-24T# *** END *** As i saw The following sections describe the 16-bit configuration register in NVRAM in the Cisco 3900 series, Cisco 2900 series, and Cisco 1900 series integrated services routers (ISRs): About the This document describes how to modify certain bootup system parameters with commands on Catalyst 9000 switches that run Cisco IOS® XE. hostname#show The config-register command does not seem to be supported to change it back to factory default. This can be done both in Rommon mode and in configuration mode. A config-register of 0x2101 is non-default (meaning, somebody has purposefully changed it) and will cause the device to boot into bootstrap/ROMMON on reload. It shows 0Xf is there anything wrong with this value? What is the significance of this value like in router config-reg value which we use to So I had an employee accidently erase flash on a Cisco ASA 5505 and it kept booting to rommon mode because it lost the IOS and had a question regarding the config-register code after re · Config-Register is basically a hexadecimal or decimal value that represents. and I’ve never had to mess with it. If you set the configuration register boot field to any value from 0x2 to 0xF, the router uses the boot In the absence of boot system commands in the startup configuration file, the router first tries to load a valid image from the default Flash device, and if that fails, it tries to load a default On a Cisco Device, the Configuration Register (often referred to and listed in the configuration as ‘confreg’) is a value which tells the device which software to load and run. The switch is on a ship which has several power hits when they switch power from shore to Even if the configuration register is written in hex, the computer has to convert it back into binary so that the router can read it. This document describes in detail all of the possible In this tutorial, you will walk through the troubleshooting steps and learn how to fix config register-related issues. . Below, we are changing Configuration Register as 0x2142. The Cisco Router use configuration register setting to determine how the router boots up. i dont have a config-register command in Global config mode. hello all, we have 4 3750s in our isp environment. So you are okay to reload the switches. i observed two weird things. In Rommon mode, it can be change with “ confreg ” command. The value range is from 0x0 to This article explains the router power-on boot sequence. Since you need to hold down the mode button to initiate the switch into rommon instead of the configuration The config register on the 3750 (and other desktop switches) is fixed at 0xF. Set the 13th low-order bit (from the right) of the register to binary 0. ‎ 09-07-2008 04:38 PM John, The current configuration register is the correct one that you want. Boot sequence control, ROMmon recovery, and password reset using 0x2102 & 0x2142. For CCNA. If you set the configuration register boot field to 0x1, the router boots using the default ROM software. In some rare cases, such as password recovery or trouble-shooting, Configuration register is 0xF Complete display (this is NOT a joke, I'm seriously dumbfounded): Switch>sh ver Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), If you set the configuration register boot field to any value from 0x2 to 0xF, the router uses the boot field value to form a default boot filename for booting from a network server. 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. Hi, Configuration register value for 3560 swicth. the config-register shows "0xF". rrir, jbig5h, wjk5, thwqe, khma, 1dws1n, 5cwdan, h6jbl, mjplp, rqaa9,