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31

Configuring the Software Configuration Register

78-4339-09

Implementing Additional Configuration and Maintenance Tasks

Boot Field Settings and the boot Command

Bits 0 through 3 of the software configuration register form the boot field, specified as a binary number.

Note

The factory default configuration register setting for systems and GRP spares is 0x2102.

Boot field—When the boot field is set to either 0 or 1 (0-0-0-0 or 0-0-0-1), the system ignores any boot
instructions in the system configuration file and the following occurs:

•

When the boot field is set to 0, you must boot the operating system manually by using the

boot

command to the system bootstrap program, or

rom monitor

.

or

•

When the boot field is set to 1, the system boots the first image in the onboard bootflash single
in-line memory module (SIMM).

Table 9

Software Configuration Register Bit Descriptions

Bit

1

1.

The factory default value for the configuration register is 0x2102. This value is a combination of the following: binary bit 8 =
0x0100 and binary bits 00 through 03 = 0x0002 (see

Table 10

).

Hexadecimal

Description

00 to 03

0x0000 to 0x000F

Boot field (see

Table 10

)

06

0x0040

System software ignores NVRAM contents

07

0x0080

OEM

2

bit enabled

2.

OEM = original equipment manufacturer

08

0x0100

Break disabled

09

0x0200

Use secondary bootstrap

10

0x0400

IP

3

broadcast with all zeros

3.

IP = Internet Protocol

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 without network numbers

15

0x8000

Enable diagnostic messages and ignore NVRAM contents

Table 10

Boot Field Descriptions (Configuration Register Bits 00 to 03)

Boot Field

Description

00

Stays at the system bootstrap prompt.

01

Boots the first system image in onboard Flash memory.

02 to 0F

Specifies a default filename for booting over the network.
Enables boot system commands that override the default filename.

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Содержание GRP-B=

Страница 1: ... 12000 Series Routers Document Contents Following are the sections in this document Important Information page 2 Product Overview page 3 Preparing for Installation page 10 Replacing a GRP page 14 GRP Boot Process Overview page 24 Starting the System and Observing Initial Conditions page 24 Verifying Interface Status page 27 Configuring the Ethernet Interface page 28 Implementing Additional Configu...

Страница 2: ...t for the first GRP If the router is equipped with an optional redundant GRP it can be installed in any of the remaining slots Cisco 12012 GRP plugs into slot 0 in the upper card cage In a dual GRP system the second GRP is located in slot 11 This is the default factory configuration and is recommended to avoid heat related problems The far right slot labeled Alarm card is reserved for the alarm ca...

Страница 3: ...to these publications Route Processor Redundancy Plus for the Cisco 12000 Series Internet Router Cisco IOS Configuration Fundamentals Configuration Guide Cisco IOS Configuration Fundamentals Command Reference Cisco IOS Release 12 0S Release Notes for Cisco 12000 Series Internet Routers Product Overview Information about the Gigabit Route Processor GRP its components functions and features and its ...

Страница 4: ...DO dynamic random access memory DRAM on two 60 nanosecond ns dual in line memory modules DIMMs 128 MB of DRAM is the minimum shipping configuration for the GRP Note GRP route memory configurations of 512 MB are only compatible with Product Number GRP B In addition Cisco IOS Release 12 0 19 S or 12 0 19 ST or later and ROMMON Release 11 2 181 or later are also required SRAM 512 kilobytes KB of stat...

Страница 5: ...sco 12000 Series Router system supports downloadable system software for most Cisco IOS software upgrades which enables you to remotely download store and boot from a new Cisco IOS software image The Cisco IOS software runs from within GRP DRAM For specific Cisco IOS software requirements for the GRP see the Cisco IOS Software Requirements section on page 3 Backplane connector SLOT 0 GIGABIT ROUTE...

Страница 6: ...ase 11 2 181 or later are also required 1 or 2 64 128 or 256 MB DIMMs based on the required DRAM configuration for main Cisco IOS software functions default configuration is 128 MB3 3 Default DRAM configuration is 128 MB Bank 1 U39 must be populated first You can use one or both banks to configure DRAM up to 512 MB U39 bank 1 U42 bank 2 SRAM4 4 SRAM is not user configurable or field upgradeable 51...

Страница 7: ...on this card SRAM SRAM provides secondary CPU cache memory The standard GRP configuration is 512 KB Its principal function is to act as a staging area for routing table updates information to and from the line cards SRAM is not user configurable or field upgradeable NVRAM System configuration files software configuration register settings and environmental monitoring logs are contained in the 512 ...

Страница 8: ...D is off Display LEDs The alphanumeric display LEDs are organized as two rows of four characters each The display content is controlled by the MBus software of the GRP Both rows of the display are powered by the MBus module These alphanumeric display LEDs provide system status messages that are displayed during the boot process and after the boot process is completed During the boot process the di...

Страница 9: ...iliary port is an EIA TIA 232 plug male that provides a data terminal equipment DTE interface the auxiliary port supports flow control and is often used to connect a modem a channel service unit CSU or other optional equipment for Telnet management Ethernet Port The GRP has one Ethernet port available using one of the following connection types RJ 45 receptacle 8 pin RJ 45 receptacle for either IE...

Страница 10: ...nd after installation Do not allow dirt or debris to enter into any components Do not wear loose clothing jewelry or other items that could get caught in the router while working with the GRP The GRP operates safely when it is used in accordance with its specifications and product usage instructions Review all safety and ESD prevention guidelines to help you to avoid injury or damage to the equipm...

Страница 11: ... at your own expense You can determine whether your equipment is causing interference by turning it off If the interference stops it was probably caused by the Cisco equipment or one of its peripheral devices If the equipment causes interference to radio or television reception try to correct the interference by using one or more of the following measures Turn the television or radio antenna until...

Страница 12: ...ments for which special conditions of installation and protection distance are used Warning This is a Class A Information Product when used in residential environment it may cause radio frequency interference under such circumstances the user may be requested to take appropriate countermeasures Statement 257 Warning This is a Class A product based on the standard of the Voluntary Control Council f...

Страница 13: ...turn the component to the factory immediately place it in a static shielding bag Avoid contact between the GRP and clothing or jewelry The wrist strap protects the board only from ESD voltages on the body ESD voltages on clothing or jewelry can still cause damage Working with Electrical Equipment Follow these basic guidelines when working with any electrical equipment Before beginning any procedur...

Страница 14: ...eplacing a GRP The following sections describe the procedures for replacing a GRP in your system Before beginning the procedures verify that your system meets the minimum requirements as described in the Preparing for Installation section on page 10 When your system meets minimum requirements proceed to the Removing a GRP section on page 14 for instructions on removing the GRP and then to the Inst...

Страница 15: ...ure 4 shows the ejector levers SL O T 0 GIGABIT ROUTE PROCESSOR SL O T 1 C O LL LI N K TX R X R J 45 M II R ES ET A U X C O N S O LE EJ EC T A C T IV E 0 C A R R IE R R X P K T A C T IV E 1 C A R R IE R R X P K T A C T IV E 2 C A R R IE R R X P K T A C T IV E 3 C A R R IE R R X P K T Q OC 3 STM POS A C T IV E 0 C A R R IE R R X C E LL OC 12 STM 4 ATM OC 12 STM 4 POS A C T IV E 0 C A R R IE R R X C...

Страница 16: ...s on the ends of the GRP See Figure 4a Step 5 Place your thumbs on the ends of each of the ejector levers and simultaneously pull them both away from the GRP faceplate in the direction shown in Figure 4b to release the GRP from the upper card cage slot and to dislodge the GRP edge connector from the backplane Step 6 Grasp the GRP faceplate with one hand and pull the GRP straight out of the slot ke...

Страница 17: ... in the appropriate slot and align the notches along the edge of the carrier with the grooves at the top and bottom of the slot Step 4 While keeping the GRP edge connector parallel to the backplane carefully slide the carrier into the slot until the GRP faceplate makes contact with the ejector levers then stop Step 5 Using the thumb and forefinger of each hand to pinch each ejector lever simultane...

Страница 18: ...nections Note The console and auxiliary ports are both asynchronous serial ports any devices connected to these ports must be capable of asynchronous transmission Asynchronous is the most common type of serial device for example most modems are asynchronous devices The console port on the GRP is an EIA TIA 232 DCE DB 25 receptacle Both Data Set Ready DSR and Data Carrier Detect DCD signals are act...

Страница 19: ...dia dependent interface MDI Ethernet port You can use either one or the other but not both at the same time Each connection supports IEEE 802 3 and IEEE 802 3u interfaces compliant with the 10BASE T and 100BASE TX standards The transmission speed of the Ethernet port is auto sensing and is determined by the network to which the Ethernet interface is connected transmission speed is not user configu...

Страница 20: ...ne network voltage TNV circuits Depending on your RJ 45 cabling requirements use the cable pinouts shown in Figure 7 or Figure 8 Figure 7 Straight Through Cable Pinout Connecting MDI Ethernet Port to MDI X Wiring Figure 8 Crossover Cable Pinout for Connecting Two GRPs Table 4 RJ 45 Receptacle Pinout Pin Description 1 TxD 2 TxD 3 RxD 4 Termination Network 5 Termination Network 6 RxD 7 Termination N...

Страница 21: ...ctor Use the jackscrews to provide strain relief for your MII cable The RJ 45 modular plug has strain relief functionality incorporated into the design of its standard plastic connector Figure 9 MII Receptacle Horizontal Orientation Table 5 lists the MII connector pinout and signals MII cables and transceivers are not available from Cisco Systems but are available commercially Jackscrew Pin 21 Pin...

Страница 22: ...de commercial cable vendors Use the following procedure to connect cables to the GRP s Ethernet interface Table 6 Specifications and Connection Limits for 100 Mbps Transmission Parameter RJ 45 MII Cable specification Category 51 UTP2 22 to 24 AWG3 1 EIA TIA 568 or EIA TIA 568 TSB 36 compliant 2 Cisco Systems does not supply Category 5 UTP RJ 45 or 150 ohm STP MII cables or MII transceivers these i...

Страница 23: ... Table 7 for cable recommendations and specifications Caution An Ethernet port is used primarily as a Telnet port into the Cisco 12000 Series Router or for booting or accessing Cisco IOS software images over a network to which an Ethernet port is directly connected Cisco Express Forwarding CEF functions are switched off by default for security reasons Cisco strongly cautions you to consider the se...

Страница 24: ...te the ROM monitor software 6 If the ROM monitor is configured to autoboot it loads and boots the Cisco IOS software or If the ROM monitor is not configured to autoboot you must enter the appropriate b command at the ROM monitor prompt rommon to boot the Cisco IOS software 7 When the Cisco IOS software boots it polls all other cards in the system and powers them up loading their Cisco IOS software...

Страница 25: ...uring the GRP boot process observe the GRP alphanumeric display LEDs which are located at one end of the GRP near the ejector lever See Figure 12 The 4 digit displays show system messages and displays a sequence similar to that shown in Table 8 Figure 12 GRP Alphanumeric Display LEDs Front Panel View Table 8 GRP Alphanumeric Display LED Sequences LED Display Description MRAM nnnn GRP microcode loa...

Страница 26: ...itor prompt b Boots the default system software from onboard Flash memory if it is present in onboard Flash memory b filename host Boots the file filename from the server host using TFTP b flash Boots the first file in the Flash memory card in Flash card slot 0 Caution To prevent system problems use the b flash command option carefully otherwise you might instruct the system to boot a non Cisco IO...

Страница 27: ...he status of the interfaces Verifying Interface Status This section provides functional descriptions of the status LEDs on the GRP see Figure 13 and the processes you should observe The status LEDs on the GRP indicate system and GRP status which Flash memory card or Flash disk slot is active which Ethernet connection is in use and what is occurring on the Ethernet interface A successful boot is in...

Страница 28: ...interface is connected The Ethernet interface does not provide external routing functions it is primarily designed as a Telnet port into the GRP and for booting and or accessing Cisco IOS software images over a network to which the Ethernet interface is directly connected Caution An Ethernet port is used primarily as a Telnet port into the Cisco 12000 Series Router or for booting or accessing Cisc...

Страница 29: ...type where type is RJ45 or MII The system default is RJ45 Step 4 If IP routing is enabled on the system you can assign an IP address and subnet mask to the interface with the ip address configuration subcommand as in the following example Router config int ip address 1 1 1 10 255 255 255 0 Step 5 Add any additional configuration subcommands required to enable or disable routing protocols such as t...

Страница 30: ...mory NVRAM Following are some reasons for changing the software configuration register settings To select a boot source and default boot filename To enable or disable the Break function To control broadcast addresses To set the console terminal baud rate To load operating software from Flash memory To enable booting from a Trivial File Transfer Protocol TFTP server To recover a lost password To al...

Страница 31: ...ptions Bit 1 1 The factory default value for the configuration register is 0x2102 This value is a combination of the following binary bit 8 0x0100 and binary bits 00 through 03 0x0002 see Table 10 Hexadecimal Description 00 to 03 0x0000 to 0x000F Boot field see Table 10 06 0x0040 System software ignores NVRAM contents 07 0x0080 OEM2 bit enabled 2 OEM original equipment manufacturer 08 0x0100 Break...

Страница 32: ...is filename to invoke the system image by booting over the network However if the configuration file contains any boot instructions the system uses those boot instructions instead of the filename it computed from the configuration register settings Note If a bootable Cisco IOS software image exists in a Flash memory card or Flash disk installed in PCMCIA slot 0 or slot 1 the configuration register...

Страница 33: ...is no boot system command the Cisco 12000 Series Router forms a default boot filename for booting from a network server See Table 11 for the format of these default filenames In the following example the software configuration register is set to boot the system from onboard Flash memory and to ignore Break at the next reboot of the system Router conf term Enter configuration commands one per line ...

Страница 34: ... Bit 10 interacts with bit 14 which controls the network and subnet portions of the broadcast address Table 12 shows the combined effect of bits 10 and 14 Bits 11 and 12 in the configuration register determine the data transmission rate of the console terminal Table 13 shows the bit settings for the four available rates The factory set default data transmission rate is 9600 cisco4 GRP 0 1 0 0 cisc...

Страница 35: ...Flash Disks ATA Flash Disk Boot Image Support Requirements Formatting a Flash Memory Card or Flash Disk Specifying Cisco IOS Image Used to Boot the System Software Commands Associated with Flash Memory Enabling Booting from Flash Memory Copying Files to Flash Memory Copying a Cisco IOS Software Image into Flash Memory Card or Flash Disk Copying Cisco IOS Software Images Between Flash Memory Cards ...

Страница 36: ...h the connector end of the card toward the slot and the label facing right See Figure 14a Note The Flash memory card or Flash disk is keyed and cannot be seated the wrong way The ejector button will not pop out if the card is not properly inserted Step 2 Insert the card into the appropriate slot until the card completely seats in the connector at the back of the slot and the ejector button pops ou...

Страница 37: ...grade to ROM Monitor version 182 or later you must also format the Flash disk with Cisco IOS Release 12 0 22 S or later ATA Flash Disk Boot Image Support Requirements A boot image that supports the ATA file system must reside in bootflash To enable booting from a Flash disk set the configuration register bits to 0x2102 and add a boot system command to the configuration as follows Router config con...

Страница 38: ... booting your router insert the Flash memory card or Flash disk into slot 0 Use the procedure in the Installing and Removing Flash Memory Card or Flash Disk in GRP section on page 35 If slot 0 is not available use slot 1 Step 2 Enter the format slot0 or format slot1 command as follows Router format slot0 All sectors will be erased proceed confirm Enter volume id up to 30 characters NewCard Formatt...

Страница 39: ... network boot fails the value 0x2102 instructs the system to ignore a break and the value 0x0002 instructs the system to look in Flash memory for this default Cisco IOS software image Software Commands Associated with Flash Memory Following are software commands related to the onboard Flash memory on the GRP and the Flash memory cards and Flash disks Note If using an ATA Flash disk replace any com...

Страница 40: ...al location has been temporarily copied E The sector that was temporarily occupied by the data was erased S The data was written to its permanent location in Flash memory Z This log was erased after the successful squeeze command operation The squeeze command operation keeps a log of which of these functions was performed so that in case of sudden power failure it can return to the correct place a...

Страница 41: ...otflash Note If using an ATA Flash disk replace any commands that include a slot0 or slot1 command argument with a disk0 or disk1 command argument Use the command copy tftp filename bootflash slot0 slot1 filename for the copy procedure where tftp filename is the source of the file and bootflash slot0 slot1 filename is the destination in onboard Flash memory or on either of the Flash memory cards o...

Страница 42: ...eaning that you know its name and can connect to it and at least one interface is available to access this server To ensure access to a TFTP server you need to configure one interface Know the filename of the image you want to copy into the Flash memory card or Flash disk Use the following procedure to copy a bootable image into the Flash memory card or Flash disk Step 1 Boot the router and allow ...

Страница 43: ...ommand to delete files from the Flash memory card or Flash disk to make sufficient room for the new Cisco IOS software image however do not delete the image old file Then use the squeeze command to remove these deleted files from the Flash memory card or Flash disk For information on the squeeze command see the Software Commands Associated with Flash Memory section on page 39 If after you delete f...

Страница 44: ...sections to first copy the configuration file from either NVRAM or DRAM to a Flash memory card or Flash disk and then to copy the configuration file from a Flash memory card or Flash disk back to NVRAM Note You cannot copy files directly into DRAM Copying Configuration File from GRP NVRAM to Flash Memory Card or Flash Disk You can use the command copy startup config slot0 slot1 filename for the co...

Страница 45: ...opying Configuration File from GRP DRAM to Flash Memory Card or Flash Disk section on page 45 Step 3 Verify that the file was copied correctly using the dir command as follows Router dir slot0 length date time name 1 5200084 May 10 1997 19 24 12 gsr p mz 112 8 3 1215 May 10 1997 20 30 52 myfile1 4 6176844 May 10 1997 23 04 10 gsr p mz 112 8 1 5 1186 May 10 1997 16 56 50 myfile2 9197156 bytes avail...

Страница 46: ...opying Configuration File from Flash Memory Card or Flash Disk to GRP NVRAM Following is an example of copying your startup configuration file from a Flash memory card or Flash disk in PCMCIA slot 0 or slot 1 back to NVRAM Flash memory cards Use the command copy slot0 slot1 filename startup config where slot0 slot1 filename is the source of the file Flash memory card and startup config is the dest...

Страница 47: ...VRAM are ignored 0x0040 allowing you to see your password 4 Enter privileged level in the system EXEC 5 Use the show startup config command to display the enable password 6 Change the configuration register value back to its original setting Use the following procedure to recover a lost password Note If the enable password is encrypted the following password recovery procedure will not work and yo...

Страница 48: ...le for the new config to take effect Step 7 Initialize the router by entering the i command as follows rommon 1 i The router power cycles the configuration register is set to ignore the configuration file and the router boots the boot system image and prompts you with the system configuration dialog as follows System Configuration Dialog Step 8 Enter no in response to the system configuration dial...

Страница 49: ...igure 15 and Table 14 The default DRAM configuration is 128 MB one 128 MB DIMM in U39 Note The total number of memory devices per DIMM differs for each manufacturer The DIMMs in Figure 16 and Figure 17 show a generic representation of the actual DRAM DIMMs for your GRP To be assured that you are using the correct DIMMs refer to the specific part numbers for your DRAM upgrade kit see the DRAM secti...

Страница 50: ...rongly recommends that you avoid configuring your router using mixed route processor cards Refer to the Route Processor Redundancy Plus for the Cisco 12000 Series Internet Router publication for more information on redundancy Caution To prevent system and memory problems when installing DRAM make sure that the card s DRAM DIMMS are 3 3VDC 60 ns EDO devices Do not attempt to install other DRAM devi...

Страница 51: ...istatic mat or pad Step 5 Position the GRP so that the faceplate is toward you and the backplane connector is away from you See Figure 15 Step 6 Locate the DRAM DIMMs on the GRP The DIMMs occupy U39 bank 1 and U42 bank 2 See Figure 15 Step 7 For the DIMM you want to remove pull down the lever on the DIMM socket to release the DIMM from the socket See Figure 16 Figure 16 Using DIMM Socket Release L...

Страница 52: ...ollowing the instructions that came with the strap Step 2 Place the GRP on an antistatic mat or pad Step 3 Position the GRP so that the faceplate is toward you and the backplane connector is away from you See Figure 15 Step 4 Remove a new DIMM from the antistatic bag Step 5 Hold the DIMM component side up with the connector edge the metal fingers closest to you Hold the ends of the DIMM between yo...

Страница 53: ...m or memory error check the following Ensure that all DIMMs are installed correctly If necessary shut down the system and remove the GRP to check the DIMMs Look straight down on the DIMMs to inspect them at eye level They all should be aligned at the same angle and the same height when properly installed If a DIMM appears to stick out or rest in the socket at a different angle from the others remo...

Страница 54: ...u can submit e mail comments about technical documentation to bug doc cisco com You can submit comments by using the response card if present behind the front cover of your document or by writing to the following address Cisco Systems Attn Customer Document Ordering 170 West Tasman Drive San Jose CA 95134 9883 We appreciate your comments Obtaining Technical Assistance For all customers partners re...

Страница 55: ...5 USA 1 800 553 2447 For a complete listing of Cisco TAC contacts go to this URL http www cisco com warp public 687 Directory DirTAC shtml TAC Case Priority Definitions To ensure that all cases are reported in a standard format Cisco has established case priority definitions Priority 1 P1 Your network is down or there is a critical impact to your business operations You and Cisco will commit all n...

Страница 56: ...ved in designing developing and operating public and private internets and intranets You can access the Internet Protocol Journal at this URL http www cisco com ipj Training Cisco offers world class networking training Current offerings in network training are listed at this URL http www cisco com en US learning index html This document is to be used in conjunction with the installation and config...

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