H3C CR16000-M Router Series FAQ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contents

Hardware· 1

Q.     What models does the H3C CR16000-M router series include?· 1

Q.     Does the router support DC power supplies?· 1

Q.     Can the power supplies be hot swapped?· 1

Q.     Can power supplies of different models be installed on the same router?· 1

Q.     Can the cards/interface modules be hot swapped?· 1

Q.     How are the interfaces numbered on the router?· 1

Q.     Does the router support active/standby MPU switchover?· 1

Q.     Can the fan speed automatically adjusted to adapt to the cooling requirements?· 1

Q.     Are the fan trays and power supplies hot swappable?· 1

Q.     What is the operating temperature and upper and lower temperature thresholds of the router?· 1

Q.     How do I identify the card serial number or manufacture information?· 2

Q.     Which cards does the router use for data forwarding?· 2

Q.     Does the router support CF cards?· 2

Q.     What protective measures do the power supplies use?· 2

Q.     Does the router provide crossbar module redundancy?· 2

Q.     Do the interface modules support interface type switching between POS and GE?· 2

Q.     Do the interface modules support interface type switching between Ethernet and FlexE?· 2

Q.     Do the interface modules support interface type switching between GE and XGE?· 2

Software· 2

Q.     Does the BootWare support forward compatibility?· 3

Q.     How do I view the system version information and operation time information?· 3

Q.     Can I delete the Comware system software image file after the upgrade is completed?· 3

Q.     Can I view deleted files?· 3

Q.     How can I empty the recycle bin?· 3

Q.     Is software hotfix supported?· 3

Q.     What is the name of the default configuration file?· 3

Q.     What should I do before installing patches?· 3

Q.     Why doesn't the router display the current startup configuration file?· 3

Q.     System management and maintenance· 4

Q.     Information displayed on the console terminal is incorrect sometimes. Why?· 4

Q.     Data loss occurred after I logged in to the router through the console port. What should I do?· 4

Q.     How can I clear a Telnet connection?· 5

Q.     Can a Telnet user's username contain the at sign (@)?· 5

Q.     I cleared the packet statistics on an interface by using the reset counters interface command. Why does the MIB browser show that the error packet count is still the same?· 5

Q.     How do I format the flash memory from the BootWare?· 5

Q.     How do I examine the memory of the router before the router starts up?· 6

Q.     Does the router relearn MAC address, ARP, and route entries after an active/standby switchover?· 7

Q.     Why should I wait for all LPUs to operate correctly before I save the running configuration?· 7

Q.     Can the management Ethernet interface come up without an IP address?· 7

Q.     I was using TFTP to transfer data from the router. Why did the transfer fail when the amount of transferred data reached about 32 MB?· 7

Q.     How are packets arriving at the standby MPU's management Ethernet interface handled?· 7

 

Hardware

This section contains the most frequently asked questions about the router hardware.

Q.     What models does the H3C CR16000-M router series include?

A.     See hardware information and specifications for the router series.

Q.     Does the router support DC power supplies?

A.     Yes. The router supports AC and DC power supplies.

Q.     Can the power supplies be hot swapped?

A.     Yes.

Q.     Can power supplies of different models be installed on the same router?

A.     No.

Q.     Can the cards/interface modules be hot swapped?

Q.     How are the interfaces numbered on the router?

A.     The interfaces on the router are numbered in the interface-type A/B/C format.

·     A—Slot number of the card.

·     B—Subslot number. If the card does not have a subslot, the subslot number is 0.

·     C—Interface number.

Q.     Does the router support active/standby MPU switchover?

A.     Yes. The standby MPU automatically takes over when the active MPU fails or is manually rebooted, to ensure service continuity.

For a successful active/standby switchover, make sure the active and standby MPUs run the same software version.

Q.     Can the fan speed automatically adjusted to adapt to the cooling requirements?

A.     Yes.

Q.     Are the fan trays and power supplies hot swappable?

A.     Yes. As a best practice, hot-swapping a component when there is a minimum influence on the service and finish the hot-swapping as quickly as possible.

To avoid card damage and power-off protection of the router, finish hot-swapping a fan tray within 2 minutes.

Q.     What is the operating temperature and upper and lower temperature thresholds of the router?

A.     The operating temperature of the router is in the range of 0°C (32°F) to 45°C (113°F).

You can use the display environment command to display the router temperature statistics, including the current temperature and temperature thresholds.

·     When the temperature drops below the lower threshold or reaches the warning threshold, the router displays a log message and a trap.

·     When the temperature reaches the alarm threshold, the router repeatedly displays log and trap messages. It also alerts the user to the high-temperature condition through LEDs on the panel.

·     When the temperature reaches the shutdown threshold, the router generates a log message and a trap, and the cards automatically power off.

Q.     How do I identify the card serial number or manufacture information?

A.     Use the display device manuinfo command on the router.

[Sysname]display device manuinfo

Q.     Which cards does the router use for data forwarding?

A.     The router uses switching fabric modules for data forwarding.

Q.     Does the router support CF cards?

A.     No.

Q.     What protective measures do the power supplies use?

A.     The power supplies adopt the following protective measures:

·     Input protection—Input over-voltage protection, input under-voltage protection, and input over-current protection.

·     Output protection—Output over-voltage protection, output over-current protection, output short-circuit protection, and output over-temperature protection.

Q.     Does the router provide crossbar module redundancy?

A.     Yes. Crossbar modules are built in switching fabric modules, and crossbar module redundancy is implemented through switching fabric module redundancy.

Q.     Do the interface modules support interface type switching between POS and GE?

A.     Only the MIC-TCP8L-M interface module supports interface type switching between POS and GE.

Q.     Do the interface modules support interface type switching between Ethernet and FlexE?

A.     Only the MIC-CQ1LF-M interface module supports interface type switching between Ethernet and FlexE.

Q.     Do the interface modules support interface type switching between GE and XGE?

A.     Only the MIC-XP4L-M interface module supports interface type switching between GE and XGE.

Software

This section contains the most frequently asked questions about the router software.

Q.     Does the BootWare support forward compatibility?

A.     Yes. After a software upgrade, you can roll back the Comware system software without rolling back the BootWare.

Q.     How do I view the system version information and operation time information?

A.     Use the display version command. This command displays information about the current BootWare version, Comware system software version, and system operation time.

Q.     Can I delete the Comware system software image file after the upgrade is completed?

A.     No. The file contains the software images for MPUs and the software images for LPUs. MPUs and LPUs read these images during startup.

Q.     Can I view deleted files?

A.     Yes if the files were deleted by a delete command without the /unreserved option. A delete command with the /unreserved option permanently deletes files. A delete command without the /unreserved option moves commands to the recycle bin.

To view the commands in the recycle bin, use the dir /all command. The name of a file in the recycle bin is placed in brackets ([ ]).

You can use the undelete command to restore commands from the recycle bin.

Q.     How can I empty the recycle bin?

A.     Use the reset recycle-bin command. If a file in the recycle bin is corrupt, use the reset recycle-bin command with the /force option to delete the file.

Q.     Is software hotfix supported?

A.     Yes.

Q.     What is the name of the default configuration file?

A.     The name of the default configuration file is flash:/startup.cfg.

Q.     What should I do before installing patches?

A.     Before installing patches, perform the following tasks:

·     Save the patch image file in the same directory on the same type of storage medium (flash memory) on the MPUs.

·     Specify the path of the patch image file for the patch file location argument.

Q.     Why doesn't the router display the current startup configuration file?

A.     The router does not display the current startup configuration file at the first startup:

<Sysname>display startup

MainBoard:

   Current saved-configuration file:          NULL

Next main startup saved-configuration file: flash:/startup.cfg

   Next backup startup saved-configuration file: NULL

SlaveBoard:

   Current saved-configuration file:          NULL

Next main startup saved-configuration file: flash:/startup.cfg

   Next backup startup saved-configuration file: NULL

Q.     System management and maintenance

This section contains the most frequently asked questions about system management and maintenance.

Q.     Information displayed on the console terminal is incorrect sometimes. Why?

A.     If nothing is displayed on the console terminal, examine the following:

·     Whether the power system is operating correctly.

·     Whether the MPUs are operating correctly.

·     Whether the console cable is connected to the console port correctly.

If no problem is found, the reason might be one of the following:

·     The access port specified for the terminal is different from the port to which the console cable is connected.

·     Settings on the configuration terminal are incorrect.

·     The cable has a problem.

If garbled characters are displayed on the terminal, settings on the configuration terminal might be incorrect.

The correct terminal settings are as follows:

·     Bits per second—9600 bps

·     Flow control—None

·     Parity—None

·     Stop bits—1

·     Data bits—8

·     Terminal display type—VT100

If you are running the terminal software SecureCRT, you must deselect the DTR/DSR option and RTS/CTS option for flow control. By default, the RTS/CTS option is selected for flow control.

Q.     Data loss occurred after I logged in to the router through the console port. What should I do?

A.     Perform the following tasks:

1.     Enter console user interface view.

2.     Use the speed command to change the data rate to 115200 bps.

3.     Close the connection.

4.     Initiate a new console connection.

Q.     How can I clear a Telnet connection?

A.     Use the free user-interface vty number command in user view.

Q.     Can a Telnet user's username contain the at sign (@)?

A.     The username of a Telnet user that is configured on the router cannot contain the at sign (@).

Q.     I cleared the packet statistics on an interface by using the reset counters interface command. Why does the MIB browser show that the error packet count is still the same?

A.     The MIB browser shows the values of the hardware counters. The reset counters interface command does not reset the hardware counters. This command clears only the statistics calculated by software.

Q.     How do I format the flash memory from the BootWare?

A.     To format the flash memory:

1.     Access the extended BootWare menu.

2.     Access the storage media management menu.

3.     Format the storage medium.

Procedure:

1.     Power on or reboot the router.

The startup information appears. (Details not shown.)

2.     Press Ctrl + B within three seconds after the "Press Ctrl+B to access EXTENDED-BOOTWARE MENU..." prompt message appears.

The extended BootWare menu appears.

==========================<EXTENDED-BOOTWARE MENU>==========================   

|<1> Boot System                                                                       |

|<2> Enter Serial SubMenu                                                            |

|<3> Enter Ethernet SubMenu                                                          |

|<4> File Control                                                                      |

|<5> Restore to Factory Default Configuration                                    |

|<6> Skip Current System Configuration                                             |

|<7> BootWare Operation Menu                                                         |

|<8> Skip Authentication for Console Login                                        |

|<9> Storage Device Operation                                                        |

|<0> Reboot                                                                              |

============================================================================

Ctrl+Z: Access EXTEND-ASSISTANT MENU

Ctrl+F: Format File System

Enter your choice(0-9): 9

3.     Enter 9 to access the storage media management menu.

==============================<DEVICE CONTROL>==============================   

|<1> Display All Available Nonvolatile Storage Device(s)                        | 

|<2> Set The Operating Device                                                         |

|<3> Set The Default Boot Device                                                     |

|<0> Exit To Main Menu                                                                 |

============================================================================   

Enter your choice(0-3): 2

4.     Enter 2 to specify the operating storage medium.

Please set the operating device:                                               

============================================================================

|Note:the operating device is flash                                                  |

|NO.  Device Name  File System  Total Size  Available Space                      |

|1    flash        JFFS2        503808KB    9604KB                                    |   

|0    Exit                                                                                |

============================================================================

Enter your choice(0-2):1                                                       

Set the operation device successful!                                           

5.     Enter 1 to use the flash memory as the operating storage medium.

==============================<DEVICE CONTROL>==============================   

|<1> Display All Available Nonvolatile Storage Device(s)                        |  

|<2> Set The Operating Device                                                         |

|<3> Set The Default Boot Device                                                     |

|<0> Exit To Main Menu                                                                 |

============================================================================   

Enter your choice(0-3): 0                                                       

6.     Enter 0 to return to the extended BootWare menu.

==========================<EXTENDED-BOOTWARE MENU>==========================

|<1> Boot System                                                                        |

|<2> Enter Serial SubMenu                                                             |

|<3> Enter Ethernet SubMenu                                                           |

|<4> File Control                                                                       |

|<5> Restore to Factory Default Configuration                                      |   

|<6> Skip Current System Configuration                                              |

|<7> BootWare Operation Menu                                                          |

|<8> Skip Authentication for Console Login                                         |

|<9> Storage Device Operation                                                         |

|<0> Reboot                                                                              |

===========================================================================

Ctrl+Z: Access EXTENDED ASSISTANT MENU                                         

Ctrl+F: Format File System                                                     

Enter your choice(0-9):       

Warning:All files on flash will be lost! Are you sure to format? [Y/N] Y

7.     Press Ctrl+F to format the flash memory.

Q.     How do I examine the memory of the router before the router starts up?

A.     Power on the router and press Ctrl+T or Ctrl+Y as prompted.

Press Ctrl+T to start the 5-step memory test procedure:

DDR2 SDRAM test successful.

System is starting...

Press Ctrl+D to access BASIC-BOOTWARE MENU...

Press Ctrl+T to start memory test

Running five-step RAM test...

This operation may take several minutes. Please wait...

DDR2 SDRAM dataline testing...                    [ PASS ]

DDR2 SDRAM addressline testing...                 [ PASS ]

Five-step RAM test succeeded.

System is starting...

Press Ctrl+Y to start the 9-step memory test procedure:

DDR2 SDRAM test successful.

Press Ctrl+T to start five-step full RAM test...                               

Press Ctrl+Y to start nine-step full RAM test...                               

Running Nine-Step RAM test…

This operation may take several minutes. Please wait...                        

DDR2 SDRAM dataline testing...                    [ PASS ]

DDR2 SDRAM addressline testing...                 [ PASS ]

DDR2 SDRAM unit testing...                        [ PASS ]

Nine-Step ram test successful.

System is starting...

Press Ctrl+D to access BASIC-BOOTWARE MENU...

Booting Normal Extend BootWare

The Extend BootWare is self-decompressing.....................Done!

Q.     Does the router relearn MAC address, ARP, and route entries after an active/standby switchover?

A.     The router relearns route entries, but it does not relearn MAC address entries and ARP entries.

The switchover does not interrupt MAC-based forwarding or ARP services because the MAC address table and the ARP table are backed up on the standby MPU. The impact on routing-based forwarding services depends on the configuration of GR or NSR:

·     If GR or NSR is configured, the switchover will not interrupt forwarding services.

·     If GR or NSR is not configured, the switchover will interrupt forwarding services.

Q.     Why should I wait for all LPUs to operate correctly before I save the running configuration?

A.     The configuration is saved on the flash memory or CF card. During startup, the router configures LPUs by loading the configuration to memory. If you execute the save command before the process is completed, the incomplete configuration in memory will be saved to the flash memory to replace the complete configuration, resulting in configuration loss.

Q.     Can the management Ethernet interface come up without an IP address?

A.     Yes. The interface can come up as long as the Layer 2 link is up. In addition, flow control is performed on the interface by software, and excessive packets arriving at the interface cannot affect system operation.

Q.     I was using TFTP to transfer data from the router. Why did the transfer fail when the amount of transferred data reached about 32 MB?

A.     This problem is caused by the TFTP server. Some TFTP servers have a limit of 32 MB on a transferred data block. When the amount of transferred data for the block reaches approximately 32 MB, the TFTP server stops requesting data transfer. If you experience this problem, please change the TFTP server software.

Q.     How are packets arriving at the standby MPU's management Ethernet interface handled?

A.     Packets are discarded on the standby MPU's management Ethernet interface. To access the device over Ethernet, use the management Ethernet interface on the active MPU or an Ethernet port on the interface card.