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34 7000 Series Route Switch Processor (RSP7000) Installation and Configuration in the Cisco 7000 Series Routers
Reference Information
Table 5 Software Configuration Register Bit Meanings
Table 6 Explanation of Boot Field (Software Configuration Register Bits 00 to 03)
Changing Settings
To change the configuration register while running the system software, follow these steps:
Step 1 Enter the enable command and your password to enter privileged level, as follows:
Router> enable
Password:
router#
Step 2 At the privileged-level system prompt (router #), enter the configure terminal command.
You will be prompted as shown in the following example:
Router# conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Step 3 To set the contents of the configuration register, enter the config-register value
configuration command, where value is a hexadecimal number preceded by 0x
(see Table 5), as in the following:
Router(config)# config-register 0x
value
Step 4 Exit the configuration mode by entering Ctrl-Z. The new value settings will be saved to
memory; however, the new settings do not take effect until the system software is reloaded
by rebooting the router.
1. The factory default value for the configuration register is 0x0101. This value is a combination of the following:
bit 8 = 0x0100 and bits 00 through 03 = 0x0001 (see Table 6).
2. OEM = original equipment manufacturer.
Bit Number
1
Hexadecimal Meaning
00 to 03 0x0000 to 0x000F Boot field (see Table 6)
06 0x0040 Causes system software to ignore NVRAM contents
07 0x0080 OEM bit enabled
2
08 0x0100 Break disabled
09 0x0200 Use secondary bootstrap
10 0x0400 Internet Protocol (IP) broadcast with all zeros
11 to 12 0x0800 to 0x1000 Console line speed (default is 9600 baud)
13 0x2000 Boot default Flash software if network boot fails
14 0x4000 IP broadcasts do not have network numbers
15 0x8000 Enable diagnostic messages and ignore NVRAM contents
Boot Field Meaning
00 Stays at the system bootstrap prompt
01 Boots the first system image in onboard Flash memory
02 to 0F Specifies a default netboot filename
Enables boot system commands that override the default netboot filename