Labnario Huawei From Scratch

display this

Very useful and very often used command on Huawei’s devices. You can use it in any view. Any time you configure something, you can use it to check what you have configured. If you set parameters, that are the same with the default ones, these parameters will not be displayed. Anyway “display current-configuration” does not also show the default parameters.

Example 1 (interface view):

[NE-GigabitEthernet1/0/1]display this
#
interface GigabitEthernet1/0/1
 description test
 undo shutdown
 ip address 10.1.1.1 255.255.255.252
 isis enable 1
 isis circuit-type p2p
 isis circuit-level level-2
 isis cost 100
 isis bfd enable
 mpls
 mpls te
 mpls rsvp-te
 mpls rsvp-te hello
#
return

In the era of ethernet transport technology we cannot forget about older, but still widely used ATM and FR technologies. Taking OSPF into consideration, it classifies networks based on link layers protocols. That’s why we have such terms like:

• broadcast
• non-broadcast multiple access NBMA
• point-to-mulitpoint P2MP
• point-to-point P2P.

Broadcast

How to manage storage devices, directories and files on Huawei’s equipment?

I will try to introduce the file system based on NE40E routers.

NE40E, as most of carrier class Huawei’s devices, has two MPU boards. Each board is equipped with two CFcards. The first CFcard, inside the board, is used for storing software and configuration’s files. The second one, at the front panel of the board, stores log files. Some of Huawei’s devices use flash memory to store all necessary files.

The file system manages files and directories in the storage device by creating, deleting, modifying, renaming files or directories and displaying contents of the files.

Let’s do an example:

1. Create labnario and huawei directories in CFcard.
2. Copy log.log file from CFcard2 to labnario directory.
3. Display this file.
4. Rename this file with old_log.log.
5. Compress it.
6. Move old_log.log.zip file to huawei directory of the same CFcard.
7. Delete this file from huawei directory.
8. Restore the deleted file.
9. Delete this file permanently.
10. Delete huawei directory.

reset saved-configuration

If you need to reconfigure a Huawei device and do not want to delete its configuration line by line, it is the fastest way to restore the device to the default configuration. Reset saved-configuration command does not delete the existing configuration file in storage device. It is required to restart the device to activate changes. Before reboot, the device compares the configuration file to be loaded at the next startup and existing file to be deleted. Finally the device:

• loads the default configuration if both files are the same
• deletes the configuration file in use if they are different
• displays a message indicating that the configuration file does not exist if the configuration file to be deleted does not exist

<labnario> reset saved-configuration
The action will delete the saved configuration in the device.
The configuration will be erased to reconfigure. Continue? [Y/N]: y

Which configuration file is set as the “next startup saved-configuration file” you can check by the following command:

In this post I will show you how to disable a notification record which appears always after you type a configuration command. This notification causes your frustration when you want to configure anything on this switch and suddenly you see the following record:

[labnario]interface GigabitEthernet 0/0/1
[labnario-GigabitEthernet0/0/1]
Jan  1 2008 00:24:47+01:00 labnario DS/4/DATASYNC_CFGCHANGE:OID 1.3.6.1.4.1.2011.5.25.191.3.1 configurations have been changed. The current change number is 24, the change loop count is 0, and the maximum number of records is 4095.

You have such situation on Huawei S2300, S3300 and S5300 switches if you are logged by the console.

How to cope with it?

You have two ways to do this. The first is to disable it temporarily by the following commands:

<labnario>undo terminal monitor

or

<labnario>undo terminal trapping