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Installation Manual
H3C AR 18-2X Series Routers

Chapter 3 Starting and Maintaining

the Router

3-16

3.2.3 Upgrading Programs through XModem

When you upgrade software through XModem, you can do that

using the console port without having to set up another configuration

environment.

I. Upgrading an application program

Step 1: Enter the Boot menu and press <1> to download an

application program using XModem. The following download speeds

are available for the router:

Downloading application program from serial ...

Please choose your download speed:

1: 9600 bps

2: 19200 bps

3: 38400 bps

4: 57600 bps

5: 115200 bps

6: Exit and reboot

Enter your choice(1-6):

Step 2: Select an appropriate download speed (for example,

115200 bps by entering <5>). The following message appears:

Download speed is 115200 bps. Change the terminal's speed

to 115200 bps, and select XModem protocol. Press ENTER key

when ready.

Step 3: Change your terminal’s baud rate to the same baud rate

for software downloading (115200 bps in this example). After that,

disconnect the terminal ([Dial-in/Disconnect]), reconnect it

([Dial-in/Dialing]), and press <Enter> to start downloading. The

system displays:

Содержание AR 18-2 Series

Страница 1: ...H3C AR 18 2X Series Routers Installation Manual Hangzhou H3C Technologies Co Ltd http www h3c com Manual Version T2 08045E 20070423 C 1 02 ...

Страница 2: ...m InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co Ltd All other trademarks that may be mentioned in this manual are the property of their respective owners Notice The information in this document is subject to change without notice Every effort has been made in the preparation of this document to ensure accuracy of the contents but all statements information and recommendation...

Страница 3: ...ace link layer protocol network protocol routing protocol multicast protocol security VPN reliability QoS MPLS dial up and Non IP Architecture as well as acronyms used in the manual Comware V3 Command Manual The manual gives the user a detailed description of the operating commands It is organized into the parts of getting started system management interface link layer protocol network protocol ro...

Страница 4: ...ation Manual is organized as follows Chapter Contents 1 Product Overview Hardware Features of H3C AR 18 2X Series Routers 2 Installing the Router Introduces the installation requirements the issues needed to be considered and the installation tools needed for the installation of the AR 18 2X Series Routers 3 Starting and Maintaining the Router Covers the configuration and software maintenance of t...

Страница 5: ...by vertical bars One is selected x y Optional alternative items are grouped in square brackets and separated by vertical bars One or none is selected x y Alternative items are grouped in braces and separated by vertical bars A minimum of one or a maximum of all can be selected x y Optional alternative items are grouped in square brackets and separated by vertical bars Many or none can be selected ...

Страница 6: ...e Create Folder Symbols III Convention Description Warning Means reader be extremely careful Improper operation may cause bodily injury Caution Means reader be careful Improper operation may cause data loss or damage to equipment Note Means a complementary description Environmental Protection This product has been designed to comply with the requirements on environmental protection For the proper ...

Страница 7: ...apter 1 Product Overview 1 1 1 1 Introduction 1 1 1 2 Hardware Features of the AR 18 2X 1 2 1 2 1 Hardware Features of the AR 18 21 1 2 1 2 2 Hardware Features of the AR 18 22 1 6 1 2 3 Hardware Features of the AR 18 22 8 18 22S 8 1 9 1 2 4 Hardware Features of the AR 18 23 1 18 23S 1 1 12 ...

Страница 8: ...N IP security IPSec VPN generic routing encapsulation GRE VPN and dynamic VPN DVPN They can provide tunnel connections to remote users to build VPNs that can be internets intranets or access networks The series support firewall AAA authentication authorization accounting network address translation NAT and quality of service QoS Therefore they can ensure security and guaranteed services to the pri...

Страница 9: ...N4 2 Ethernet LED LAN3 3 Ethernet LED LAN2 4 Ethernet LED LAN1 5 WAN LED WAN0 6 SYSTEM LED SYS 7 POWER LED PWR Figure 1 1 Front view of the AR 18 21 1 Power switch 2 Power socket 3 Console port CONSOLE 4 Ethernet interface 1 LAN1 5 Ethernet interface 2 LAN2 6 Ethernet interface 3 LAN3 7 Ethernet interface 4 LAN4 8 Grounding screw 9 WAN interface WAN0 Figure 1 2 Rear view of the AR 18 21 ...

Страница 10: ...00 Mbps Ethernet interfaces LAN Processor MPC8247 SDRAM 64 MB Flash 8 MB Hardware encryption Max power 10 W Input Rated voltage 100 to 240 VAC 50 to 60 Hz Current 0 5 A Power supply extern al Output Voltage 12 VDC Current 1 25 A Dimensions W x D x H 300 x 180 x 45 mm 11 81 x 7 09 x 1 77 in the maximum measurements including the bulge Weight 1kg 2 20 lb Operating temperature 0 to 40 C 32 to 104 F R...

Страница 11: ... present ON means a link is present Blinking means data is being sent or and received SYS Blinking means the system is operating normally Steady ON or OFF means the system is improperly operating PWR OFF means no power is being supplied ON means power is being supplied IV Interface attributes The interfaces that the AR 18 21 provides are described as follows 1 Console port Table 1 3 Attributes of ...

Страница 12: ... interface on a PC to run the terminal emulation program on the PC Command line interface CLI 2 Ethernet interface Table 1 4 Attributes of the Ethernet interface Attribute 10BASE T 10 100BASE T Connector RJ45 Interface type MDI MDIX autosensing Operating mode 10 Mbps Full duplex half duplex 10 100 Mbps autosensing Full duplex half duplex Supports only L2 switching ...

Страница 13: ...LAN2 4 Ethernet LED LAN1 5 WAN LED WAN1 6 WAN LED WAN0 7 SYSTEM LED SYS 8 POWER LED PWR Figure 1 3 Front view of the AR 18 22 1 Power switch 2 Power socket 3 Console port CONSOLE 4 Ethernet interface 1 LAN1 5 Ethernet interface 2 LAN2 6 Ethernet interface 3 LAN3 7 Ethernet interface 4 LAN4 8 Grounding screw 9 WAN interface WAN0 10 WAN interface WAN1 Figure 1 4 Rear view of the AR 18 22 ...

Страница 14: ...00 Mbps Ethernet interfaces LAN Processor MPC8247 SDRAM 64 MB Flash 8 MB Hardware encryption Max power 10 W Input Rated voltage 100 to 240 VAC 50 to 60 Hz Current 0 5 A Power supply extern al Output Voltage 12 VDC Current 1 25 A Dimensions W x D x H 300 x 180 x 45 mm 11 81 x 7 09 x 1 77 in the maximum measurements including the bulge Weight 1kg 2 20 lb Operating temperature 0 to 40 C 32 to 104 F R...

Страница 15: ...ent ON means a link is present Blinking means data is being sent or and received SYS Blinking means the system is operating normally Steady ON or OFF means the system is improperly operating PWR OFF means no power is being supplied ON means power is being supplied IV Interface attributes The AR 18 22 provides a consol port and 10 100 Mbps Ethernet interfaces Refer to 1 2 1 IV for attributes detail...

Страница 16: ...onnection LEDS of Ethernet Interfaces LAN1 LAN8 LINK ACT 3 Reset 4 Console Port 5 WAN Port WAN1 6 WAN Port WAN0 7 Speed LEDs of Ethernet Interfaces LAN1 LAN8 SPEED 8 Layer2 Ethernet Interfaces LAN1 LAN8 9 SYSTEM LED SYS Figure 1 5 Front view of the AR 18 22 8 18 22S 8 1 Grounding screw 2 Power socket 3 Power switch Figure 1 6 Rear view of the AR 18 22 8 18 22S 8 ...

Страница 17: ...erface WAN 8 x 10 100 Mbps Ethernet interfaces LAN Processor MPC8248 SDRAM 64 MB 128 MB Flash 8 MB 16 MB Hardware encryption Supported Max power 10 W Input voltage and current AC Rated voltage 100 to 240 VAC 50 to 60 Hz Current 0 5 1 A Dimensions W x D x H 300 x 225 x 42 mm 11 81 x 8 85 x 1 65 in the maximum measurements including the bulge Weight 2kg 4 40 lb Operating temperature 0 to 40 C 32 to ...

Страница 18: ...ent Blinking means data is being sent or and received LAN1 LAN 2 LAN3 LA N4 LAN5 L AN6 LAN7 LAN8 WA N0 WAN1 SPEED OFF means the link rate is 10 Mbps ON means the link rate is 100 Mbps SYS Blinking means the system is operating normally Steady ON or OFF means the system is improperly operating PWR OFF means no power is being supplied ON means power is being supplied IV Interface attributes The AR 1...

Страница 19: ...S 1 I Appearance 1 POWER LED PWR 2 Reset 3 Console Port CONSOLE 4 Ethernet Interface ETH0 5 Ethernet Interface ETH1 6 Ethernet Interface ETH2 7 Ethernet Interface ETH3 8 SYSTEM LED SYS Figure 1 7 Front view of the AR 18 23 1 18 23S 1 1 Grounding screw 2 Power socket 3 Power switch Figure 1 8 Rear view of the AR 18 23 1 18 23S 1 ...

Страница 20: ... 100 Mbps Ethernet interface Processor MPC8248 SDRAM 64 MB 128 MB Flash 8 MB 16 MB Hardware encryption Supported Max power 10 W Input voltage and current AC Rated voltage 100 to 240 VAC 50 to 60 Hz Current 0 5 1 A Dimensions W x D x H 300 x 225 x 42 mm 11 81 x 8 85 x 1 65 in the maximum measurements including the bulge Weight 2kg 4 40 lb Operating temperature 0 to 40 C 32 to 104 F Relative humidit...

Страница 21: ...ing sent or and received ETH0 ETH1 ETH2 ETH3 SPEED OFF means the link rate is 10 Mbps ON means the link rate is 100 Mbps SYS Blinking means the system is operating normally Steady ON or OFF means the system is improperly operating PWR OFF means no power is being supplied ON means power is being supplied IV Interface attributes The AR 18 23 1 18 23S 1 provides a consol port and 10 100 Mbps Ethernet...

Страница 22: ...talling the Router 2 2 2 2 1 Placing the Router on a Tabletop Workbench 2 2 2 2 2 Mounting the Router on a Vertical Surface 2 3 2 2 3 Installing the Router in a Rack 2 4 2 3 Connecting the Ground Wire 2 5 2 4 Connecting the Power Cord 2 6 2 5 Connecting the Router to a Console Terminal 2 7 2 6 Connecting the Router to LAN 2 8 2 7 Verifying Installation 2 9 ...

Страница 23: ...in the range 5 to 90 z Keep the router away from radio transmitting stations radar stations and high frequency devices Use electromagnetic shielding if necessary z Do not put the router on an unstable table or platform z Make sure that the rack workbench has a good ventilation system and is properly grounded z Wear an ESD preventive wrist strap during installation making sure that it has good skin...

Страница 24: ...or when electricity hazards are present to avoid electrical shocks Before you open the chassis obtain the permission of your sales agent z Correctly connect the interface cables Do not connect a telephone cable including the ISDN cable to a serial port z Do not hot swap any cable 2 2 Installing the Router You can place your router on a sturdy tabletop or workbench mount it on a vertical surface or...

Страница 25: ... anchored strain of the network cable connections can pull the router from the wall z Install the router in such a position that the LEDs can be read easily z Securely fix the external power supply unit of the router preventing the power cord from falling down Follow these steps to mount the router on a wall or other vertical surface Step 1 Install four pan head screws on a wall or other flat vert...

Страница 26: ...1 AR 18 23S 1 can be installed in a 19 inch rack The following are Installation steps 1 Check the stability and grounding of the rack Use screws to install rack mounting ears on the router s front or rear cover 2 Place the router on a pallet of the rack and slide it to a proper position Keep a proper distance between the router and slides 3 Use rustproof pan head screws to fix the rack mounting ea...

Страница 27: ...nd Wire Caution Properly connect the ground wire before connecting other cables and shorten it as much as possible to prevent the router and the connected device from getting damaged during periods of lightning activities The grounding screw of the chassis PGND is located on the rear panel Connect this screw to the earth ground using a ground wire The grounding resistance must not be greater than ...

Страница 28: ...0 to 60 Hz Input current 0 5 to 1A Output voltage 12 VDC Output current 1 25 A Figure 2 3 illustrates the power supply Figure 2 3 Power supply II Connecting the AC input power cord Step 1 Put the power switch of the router in OFF position Step 2 Connect the output of the power supply to the power input on the rear panel of the router and then insert the input connector of the power supply into an ...

Страница 29: ...er to Chapter 4 Troubleshooting for a solution 2 5 Connecting the Router to a Console Terminal I Console cable The console cable has an RJ45 connector at one end and a DB9 female connector at the other end A A Figure 2 4 Console cable assembly II Connecting the console cable Follow these steps to connect the router to a console terminal Step 1 Select a console terminal The console terminal can be ...

Страница 30: ...ing the Router 2 6 Connecting the Router to LAN I Ethernet cable A 10 100Base TX Ethernet interface is usually connected to an Ethernet using a category 5 twisted pair cable as shown in Figure 2 5 Figure 2 5 Ethernet cable assembly Ethernet cables fit into two categories straight through and crossover z Straight through cable at both ends of which the wires are crimped in the RJ45 connectors in th...

Страница 31: ... the port to be connected carefully before making connection to make sure it is the right port The 10 100BASE T interface on the AR18 2X series supports MDI MDIX autosensing Therefore you can connect your router to another device using either straight through cable or crossover cable without considering whether the two devices are of the same type You can simply connect one end of the network cabl...

Страница 32: ... H3C AR 18 2X Series Routers Chapter 2 Installing the Router 2 10 z The proper power supply is used z The grounding wire of the router is correctly connected z The console cable and the power cord are correctly connected ...

Страница 33: ...guration Environment 3 1 3 1 2 Powering on the Router 3 5 3 2 Maintaining the Router 3 6 3 2 1 Boot Menu 8 MB Flash Is Installed 3 6 3 2 2 Boot Menu 16 MB Flash Is Installed 3 10 3 2 3 Upgrading Programs through XModem 3 16 3 2 4 Backing up and Restoring the Extended Segment of the Boot Rom Program 3 20 3 2 5 Upgrading Boot ROM at CLI 3 21 3 2 6 Upgrading Application Programs with NET 3 25 ...

Страница 34: ...mply connect the RJ45 connector of the console cable to the console port on the router and the DB9 connector to the serial port on the console terminal a PC for example as shown in Figure 3 1 PC Router Console cable Console port t Figure 3 1 Local configuration through the console por II Setting terminal parameters Follow these steps to set terminal parameters on the console terminal a PC that run...

Страница 35: ...scription dialog box as shown in Figure 3 2 Figure 3 2 Setting up a new connection Step 2 Enter the name of the new connection in the Name field and click OK The dialog box as shown in Figure 3 3 displays Step 3 Select the serial port to be used from the Connect Using dropdown menu The serial port must be the same port connected by the console cable ...

Страница 36: ...R 18 2X Series Routers r 3 3 Figure 3 3 Setting the connection port Step 4 Click OK The Port Settings tab shown in Figure 3 4 appears and you can set serial port parameters Set the following parameters Baud rate 9600 Databit 8 Parity check none Stopbit 1 Flow control none ...

Страница 37: ... 3 4 Figure 3 4 Setting communications parameters Step 6 Click OK The HyperTerminal dialogue box appears Step 7 Select Properties Step 8 In the Properties dialog box select the Settings tab as shown in Figure 3 5 Step 9 Select VT100 or Auto detect in the Emulation dropdown menu Step 10 Click OK ...

Страница 38: ...ute H3C AR 18 2X Series Routers r 3 5 Figure 3 5 Setting the terminal type 3 1 2 Powering on the Router After the router is powered on the Boot Rom program runs first and the following system information appears on the terminal screen System starts booting V10 50 ...

Страница 39: ...Hardware Version is 4 0 CPLD Version is 1 0 Press Ctrl B to enter Boot Menu Press Enter The system displays if login authentication is not enabled H3C This prompt indicates that the router enters system view and is ready for configuration 3 2 Maintaining the Router 3 2 1 Boot Menu 8 MB Flash Is Installed The AR 18 21 18 22 18 22 8 18 23 1 has an 8MB flash Start the router When the information Pres...

Страница 40: ...decompressing the program you need to reboot the router Type the correct password and press Enter If no Boot Rom password is configured just press Enter The system accesses the following Boot menu Boot Menu 1 Download application program with XMODEM 2 Download application program with NET 3 Start up and ignore configuration 4 Enter debugging environment 5 Boot Rom Operation Menu 6 Do not check the...

Страница 41: ...o Main Menu Enter your choice 1 3 1 z Select 1 to change the parameters for downloading The following information is displayed Change Boot Parameter clear field go to previous field D quit boot device mot fccl processor number 0 host name 8040 file name M8240ram arj inet on ethernet e 169 254 10 10 inet on backplane b host inet h 169 254 10 11 gateway inet g user u 8040 ftp password pw blank use r...

Страница 42: ...er you set the parameters select 2 to start downloading z Select 3 to exit to the main menu 3 Start up and ignore the configuration file 4 Enter debugging environment for troubleshooting Caution Upgrade router software only when necessary and with help of engineers When doing that make sure that the Boot Rom software version can work with the version of the adopted application program 5 Enter the ...

Страница 43: ...sion of the Boot Rom program its extended segment and application program for backward compatibility If you fail to upgrade the software because the system considers that you are using an invalid version even when the correct version is used you can use this option to ignore the version check during software upgrading Note that this option works only once after you select it Then the system resume...

Страница 44: ...e the correct password and press Enter If no Boot Rom password is configured just press Enter The system accesses the Boot Menu Boot Menu 1 Download application program with XMODEM 2 Download application program with NET 3 Set application file type 4 Display applications in Flash 5 Clear application password 6 Start up and ignore configuration 7 Enter debugging environment 8 Boot Rom Operation Men...

Страница 45: ...t the system defines and attempts to boot in order with three boot files main backup and secure if they have been loaded to Flash You can select this option to change the order or startup file If it fails to boot with the secure boot file it prompts boot failure The following table gives default names and types of the boot files Table 3 1 Default names and types of the boot files Boot file File na...

Страница 46: ...pplication image files in the Boot Rom menu or using commands after the application image boots z Secure boot file is the last system boot resort You can download it in the Boot Rom menu and must name it secure bin However you cannot modify this file or change the type of another file to S If you change the name of the secure boot file with the rename command after the system boots the file is rem...

Страница 47: ...ed main bin changes to N A while the file type of the backup bin changes to M B Now the backup bin file is the first boot file 4 Display applications in Flash memory Select option 4 The console screen displays M MAIN B BACKUP S SECURE NO Name Size Type Time 1 main bin 5988025 N A Oct 10 2005 10 10 10 2 backup bin 5985198 M B Oct 10 2005 10 10 10 3 Exit to main menu Where you can see that the type ...

Страница 48: ...menu The Boot Rom submenu is displayed Boot ROM Download Menu 1 Download Boot Rom with XModem 2 Download Extended Segment of Boot Rom with XModem 3 Restore Extended Segment of Boot Rom from FLASH 4 Backup Extended Segment of Boot Rom to FLASH 5 Exit to Main Menu Enter your choice 1 5 The menu provides approaches to Boot Rom upgrade backup and recovery 9 Ignore software version for backward compati...

Страница 49: ...nloading application program from serial Please choose your download speed 1 9600 bps 2 19200 bps 3 38400 bps 4 57600 bps 5 115200 bps 6 Exit and reboot Enter your choice 1 6 Step 2 Select an appropriate download speed for example 115200 bps by entering 5 The following message appears Download speed is 115200 bps Change the terminal s speed to 115200 bps and select XModem protocol Press ENTER key ...

Страница 50: ...aud rate takes effect only after you reconnect the terminal emulation program Step 4 Select Transmit send file in the terminal window The following dialog box pops up Figure 3 6 Send File dialog box Step 5 Click Browse Select the application file to be downloaded and set protocol to XModem Click Send The following interface pops up ...

Страница 51: ...h and then displays the following information in the terminal interface indicating completion of the downloading Download completed Writing to flash memory Please wait it needs a long time Please wait Writing FLASH Success Please use 9600 bps Press ENTER key to reboot the system Restore the speed of the console terminal to 9600 bps as prompted disconnect and reconnect the terminal The system start...

Страница 52: ...odem Several speed options are available for you The subsequent steps are the same as those described in I Upgrading an application program of this section Caution You cannot restore the Boot Rom program on site if you fail to upgrade the entire Boot Rom program Therefore you must not upgrade the entire Boot Rom program unless necessary and with help of engineers III Upgrading the extended segment...

Страница 53: ...used to upgrade a portion of the Boot Rom program so you can make a second attempt once errors occur 3 2 4 Backing up and Restoring the Extended Segment of the Boot Rom Program I Backing up the extended segment of the Boot ROM program to the Flash Follow these steps to back up the extended segment of the Boot Rom Step 1 Enter the Boot menu and then select 7 to enter the Boot Rom operation sub menu...

Страница 54: ...ot Menu and then select 7 to enter the Boot Rom operation sub menu Step 2 Select 3 in the operation sub menu to restore the extended segment of the Boot Rom from the Flash If the operation is successful the system displays Writing to Boot Rom Please wait Restoring Boot Rom program successed Step 3 When the sub menu appears again select 5 to exit and reboot the router 3 2 5 Upgrading Boot ROM at CL...

Страница 55: ...TP server to the folder that contains the Boot ROM upgrade file That is ensure the Boot ROM upgrade file are available in the Base Directory folder as shown in Figure 3 8 For different TFTP server software packages the interfaces differ Figure 3 8 TFTP server program interface 3 Configure the router to download the Boot ROM upgrade file from the TFTP server H3C tftp 1 1 1 1 get bootromfull ...

Страница 56: ... the router so that the upgrade made to the Boot ROM takes effect After the router is restarted you can use the display version command to display the current Boot ROM version or directly enter the Boot ROM menu so as to verify the upgrade operation II Upgrading Boot ROM Through FTP 1 Connect the FTP server to the router on which Boot ROM is to be upgraded so that they can communicate with each ot...

Страница 57: ... interface 3 Configure the router to download the Boot ROM upgrade file from the FTP server H3C ftp 1 1 1 1 Trying 1 1 1 1 Press CTRL K to abort Connected to 1 1 1 1 220 3Com 3CDaemon FTP Server Version 2 0 User 1 1 1 1 none guest Enter the username configured on the FTP server 331 User name ok need password Password Enter the corresponding password 230 User logged in The connection is established...

Страница 58: ...succeeds 5 After the upgrade operation is complete restart the router so that the upgrade made to the Boot ROM takes effect After the router is restarted you can use the display version command to display the current Boot ROM version or directly enter the Boot ROM menu so as to verify the upgrade operation 3 2 6 Upgrading Application Programs with NET Upgrading an application program with net is t...

Страница 59: ...nd set the path to the file that is to be downloaded For the FTP server you must also set username and password 2 Enter the Boot Menu and select 2 to download with NET 3 In the NET download menu select 1 to enter the parameter configuration interface z To upgrade through TFTP you need to provide values to these parameters file name name of the file to be loaded inet on ethernet e IP address of the...

Страница 60: ... one configured on the FTP server flags f set to 0x0 These values are automatically saved after you configure them 4 Press Enter In the NET downloading menu select 2 The following message appears boot device motfccl unit number 0 processor number 0 host name 8040 file name Q8040 BIN inet on ethernet e 10 110 27 235 host inet h 10 110 27 231 user u 8040 ftp password pw 8040 flags f 0x80 Attached TC...

Страница 61: ...18 2X Series Routers Chapter 3 Starting and Maintaining the Router 3 28 Please wait it needs a long time Writing Comwaresoftware File Succeeds Press Enter key to reboot the system Press Enter as prompted to have the router reboot ...

Страница 62: ... 2X Series Routers Table of Contents i Table of Contents Chapter 4 Troubleshooting 4 1 4 1 Troubleshooting the Power System 4 1 4 2 Troubleshooting the Configuration System 4 1 4 3 Recovering Replacing a Lost Boot Rom Password 4 3 ...

Страница 63: ...er cord of the router is properly connected z The correct power source is used Caution Do not plug unplug the power cord when power is being supplied If POWER LED is still OFF after you check against the items listed above contact your agent 4 2 Troubleshooting the Configuration System If the router is operating normally after it is powered on it displays the start up information on the console te...

Страница 64: ...ole cable is connected correctly Step 2 Check the console cable and the terminal such as the HyperTerminal parameter settings Symptoms 2 Illegible characters are displayed on the console terminal after the router is powered on Solution Make sure you have set on your terminal HyperTerminal Baud rate 9600 Databit 8 Parity check none Stopbit 1 Flow control none Terminal emulation VT100 Reconfigure th...

Страница 65: ...lation Manual H3C AR 18 2X Series Routers Chapter 4 Troubleshooting 4 3 4 3 Recovering Replacing a Lost Boot Rom Password If the Boot Rom password of the router is lost contact the local agent of H3C for help ...

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