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A-1
Cisco 7500 Series Installation and Configuration Guide
OL-5008-03 B0
APPENDIX
A
Configuration Register Information
The following information is found in this appendix:
• Configuration Bit Meanings, page A-1
• Displaying the Configuration Register While Running Cisco IOS, page A-5
• Displaying the Configuration Register While Running ROM Monitor, page A-5
• Setting the Configuration Register While Running Cisco IOS, page A-6
• Setting the Configuration Register While Running ROM Monitor, page A-6
Configuration Bit Meanings
Use the processor configuration register information contained in this appendix to do the following:
• Set and display the configuration register value
• Force the system into the bootstrap program
• Select a boot source and default boot filename
• Enable or disable the Break function
• Control broadcast addresses
• Set the console terminal baud rate
• Load operating software from ROM
• Enable booting from a Trivial File Transfer Protocol (TFTP) server
Table A-1 lists the meaning of each of the configuration memory bits. Following the table is a more
in-depth description of each setting.
Table A-1 Configuration Register Bit Settings
Bit No. Hex Meaning
00–03 0x0000–0x000F Boot field
06 0x0040 Causes the system software to ignore nonvolatile random-access
memory (NVRAM) contents
07 0x0080 OEM (original equipment manufacturer) bit enabled
08 0x0100 Break disabled
10 0x0400 IP broadcast with all zeros
- Configuration Guide 1
- CONTENTS 3
- Contents 10
- OL-5008-03 B0 10
- Audience 11
- Organization 11
- Related Documentation 12
- Conventions 13
- Safety Warnings 15
- Attention 16
- Figyelem! 16
- Avvertenza 16
- Advarsel 17
- ¡Advertencia! 17
- Varning! 17
- Restricted Area Warning 18
- Obtaining Documentation 19
- Documentation Feedback 20
- Submitting a Service Request 21
- Terms and Acronyms 24
- Cisco 7505 Overview 25
- Cisco 7505 CyBus Backplane 26
- Cisco 7505 Overview 27
- Cisco 7507 Overview 28
- Cisco 7507 Overview 29
- Cisco 7507-MX Overview 33
- Cisco 7507-MX Overview 34
- Cisco 7513 Overview 37
- Front-panel 38
- Cisco 7513 Overview 39
- 012345RSPRSP89101112 40
- Cisco 7513-MX Overview 42
- Cisco 7513-MX Overview 44
- Cisco 7576 Overview 47
- Cisco 7576 Overview 49
- Router A 50
- Router B 50
- CyBus Slot Number Assignments 51
- RSP2—Cisco 7505 53
- Common RSP Hardware Features 64
- RSP NVRAM 65
- RSP Flash Memory 65
- RSP SRAM 65
- RSP EEPROM 66
- RSP Auxiliary Port Pinout 67
- Arbiter Overview 72
- Chassis Interface Overview 72
- Cisco 7505 Fan Tray Assembly 74
- Cisco 7576) 75
- Interface Processor Overview 76
- System Software Overview 78
- Preparing for Installation 79
- Safety Recommendations 80
- Chassis Lifting Guidelines 81
- Safety Recommendations 82
- Plant Wiring Guidelines 88
- Plant Wiring Guidelines 89
- Top view of router 91
- Front of 92
- Power supplies 93
- Card cage 93
- System blower 93
- Intake air Exhaust air 93
- Noninterface processor end 95
- Interface processor end 95
- Cisco 7500 Series 100
- 7507-MX) 103
- Installing the Cisco 7505 118
- Installing the Cisco 7505 119
- Remove a module as follows: 120
- Install a module as follows: 120
- Rack-Mounting the Cisco7505 121
- Install the cable management 123
- Captive installation screws 131
- Cisco 7513 and Cisco 7576 134
- Unpacking Instructions 134
- Captive screws 142
- Power Supplies 143
- What Do I Do Now? 147
- What Do I Do Now? 148
- Recovering a Lost Password 157
- Configuring Interfaces 163
- Checking the Settings 167
- Copying Files to Flash Memory 173
- Removing/replacing 187
- Chassis interface 193
- Standoff 193
- AC receptacle 195
- On/off switch 195
- Cable retention 195
- DC OK LED 195
- Cisco 7507-MX 201
- AC POWER 203
- Guide tab slides up 207
- • LED board (MAS-7KLED=) 209
- Black (ground) 215
- Purple (+24V) 215
- Blower power connection 215
- Backplane 215
- Cisco 7576 Router 219
- Cisco7576 220
- Cage Assembly 223
- Exchanging the EEPROM Devices 225
- Blower module 228
- Chassis Cover Panels 229
- Backplane Maintenance Cover 231
- 7513-MX, and Cisco7576 232
- Troubleshooting Overview 240
- Cisco 7513-MX, and Cisco7576 250
- Subsystem 253
- Troubleshooting the RSP 256
- Using the RSP LEDs 259
- Using the Power Supply LEDs 261
- For the DC-input 264
- Removing RSP2 SIMMs 267
- Installing New RSP2 SIMMs 268
- Removing RSP4 and RSP8 DIMMs 273
- Configuration Bit Meanings 277
- Bits 0–3 278
- Configuration Bit Meanings 279
- Bit 10 and Bit 14 280
- Bit 11 and Bit 12 280
- Numerics 285
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