Cisco ESR10008 Hardware Installation Guide - Page 87
Relocating the Configuration to a Flash Disk, Managing System Boot Parameters
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Chapter 4 Starting and Configuring the Router Managing System Boot Parameters Relocating the Configuration to a Flash Disk To run the startup configuration off a Flash disk, use the following commands beginning in privileged EXEC mode: Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Copy the current startup configuration to a new location. In the following example, the configuration file is copied from a TFTP server to a Flash disk in slot 0: Router# copy tftp://172.16.2.15/example-config disk0:router-config Enter global configuration mode. Router# configure terminal Router(config)# The buffer that holds the configuration file is usually the size of NVRAM (512 KB). Larger configurations need larger buffers. Change the size of the buffer that holds the configuration commands. Router(config)# boot buffersize 1024000 Specify that the startup configuration file is located in Flash memory by setting the CONFIG_FILE variable. In the following example, the system is told that the boot configuration file is in slot 0 and the filename is router-config: Router(config)# boot config disk0:router-config Exit global configuration mode. end When you finish changing the running-configuration, save the new configuration. Router# copy running-config startup-config As a result of this procedure, when you reboot the Cisco 10000 series router, it loads the configuration file that resides on Flash disk 0. Managing System Boot Parameters This section tells you how to use Cisco IOS to modify PRE boot parameters by changing the configuration register settings. During the boot process, the system reads a configuration register that defines certain system parameters. The software configuration register is a 16-bit register in NVRAM used to define such characteristics as • The source of the Cisco IOS software image required to run the router • Whether the system software should ignore the contents of NVRAM • The behavior of the Break function By modifying the boot parameters, you can customize your Cisco 10000 series router. For example, a common configuration register setting in some lab environments is 0x2100. Using this setting, the system boots to the ROM monitor prompt, where a technician can load a specific image by entering the boot command at the rommon prompt. (For more information, see the Cisco IOS Configuration Fundamentals Configuration Guide.) OL-0659-13 Cisco 10008 Router Hardware Installation Guide 4-9
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