Users Cannot Communicate After VLAN Mapping Is Configured ?

This section describes the troubleshooting flowchart and provides a step-by-step troubleshooting procedure to use when users cannot communicate after VLAN mapping is configured.

Common Causes

As shown in Figure 1, users in VLAN 6 need to communicate with users in VLAN 5 over

an ISP network. The carrier assigns VLAN 10 as the stack VLAN (S-VLAN). Single-tag VLAN mapping is configured on GE0/0/1 of SwitchC and SwitchD to map customer VLANs (CVLANs) 5 and 6 to S-VLAN 10.

After VLAN mapping is configured on the interfaces, users in different VLANs cannot

communicate with each other. This fault is commonly caused by one of the following:

1 The translated VLAN (specified by map-vlan) has not been created.

2 The interfaces configured with VLAN mapping are not added to the translated VLAN.

3 The translated VLAN ID configured on SwitchC and SwitchD is different from the SVLAN ID assigned by the carrier.

4 The interfaces configured with VLAN mapping are faulty.

Troubleshooting Procedure

NOTE

Saving the results of each troubleshooting step is recommended. If troubleshooting fails to correct the fault, you will have a record of your actions to provide Huawei technical support personnel.

Procedure

Step 1 Check that the translated VLAN (specified by map-vlan) has been created.

Run the display vlan command on SwitchC and SwitchD to check whether the translated VLAN has been created.

l If the translated VLAN has not been created, run the vlan command to create it.

l If the translated VLAN has been created, go to step 2.

Step 2 Check that the interfaces configured with VLAN mapping have been added to the translated VLAN in tagged mode.

Run the display this command on the interfaces configured with VLAN mapping to check

whether the interfaces have been added to the translated VLAN in tagged mode.

NOTE

1 VLAN mapping can only be configured on a trunk or hybrid interface, and the interface must be added to the translated VLAN in tagged mode.

2 If a range of original VLANs is specified by vlan-id1 to vlan-id2 on an interface, the interface must be added to all the original VLANs in tagged mode, and the translated VLAN cannot have a VLANIF interface.

3 Limiting MAC address learning on an interface may affect N:1 VLAN mapping on the interface.

4 If the interfaces configured with VLAN mapping have not been added to the translated

VLAN in tagged mode, run the port trunk allow-pass vlan or port hybrid tagged vlan

command in the interface views to add the interfaces to the translated VLAN in tagged

mode.

5 If the interfaces have been added to the translated VLAN in tagged mode, go to step 3.

Step 3 Check that the translated VLAN ID configured on SwitchC and SwitchD is the same as the SVLAN ID assigned by the carrier.

Run the display this command on the interfaces configured with VLAN mapping to check

whether the translated VLAN ID is the same as the S-VLAN ID assigned by the carrier.

If the translated VLAN ID on an interface is different from the S-VLAN ID assigned by

the carrier, run the undo port vlan-mapping vlan command on the interface to delete the

VLAN mapping configuration, and then run the port vlan-mapping vlan command to set

the translated VLAN ID to the S-VLAN ID.

If the translated VLAN ID is the same as the S-VLAN ID assigned by the carrier, go to

step 4.

Step 4 Check that the user-side interfaces are in the C-VLANs.

Run the display vlan vlan-id command on SwitchA and SwitchB to check whether the userside interfaces are in the C-VLANs.

1 If the user-side interfaces are not in the C-VLANs, run the port trunk allow-pass vlan,

port hybrid tagged vlan, or port default vlan command to add the interfaces to the CVLANs.

2 If the user-side interfaces are in the C-VLANs, go to step 5.

Step 5 Collect the following information and contact Huawei technical support personnel.

1 Results of the preceding troubleshooting procedure

2 Configuration files, log files, and alarm files of the Switches

----End

If you want to know the more detailed Huawei switch you can visit the page: 

http://www.huanetwork.com/blog

How to Recover the BootROM Password on Huawei Switch

Huawei S2750&S5700&S6700 Series Ethernet Switches Troubleshooting: How to Recover the BootROM Password? Below will give you the answer:

The BootROM is the basis for device security and maintenance, which provides the functions such as configuration recovery and system software upgrade. You must keep the BootROM password secure. If the BootROM password is lost, you can run the reset boot password command to restore the default password and reset a password.

To reset the BootROM password through the BootROM menu, you must connect to the console port and log in to the device through the console port.

1. In any view, restore the default BootROM password Admin@huawei.com.

<HUAWEI> reset boot password

The password used to enter the boot menu by clicking Ctrl+B will be restored

To the default password, continue? [Y/N] y

Info: Succeeded in setting password of boot to "Admin@huawei.com".

NOTE

The reset boot password command is only supported by versions later than V200ROO1 (including V200ROO1). The default password for versions earlier than V200R001 is huawei9300.

2. The default password is not secure and must be changed.

You can change the BootROM password using either of the following methods:

1 Run the bootrom password change command in the system view to change the

BootROM password.

<HUAWEI> system-view

[HUAWEI] bootrom password change

Old Password: //Enter the old password (default:

Admin@huawei.com).

New Password(6 to 79 chars): //Enter a new password.

Confirm Password(6 to 79 chars): //Enter the new password again.

2 Enter 6 in the BootROM menu to change the BootROM password.

Run the reboot command to restart the device. When the message "Press Ctrl+B to

enter Boot Menu..." is displayed, press Ctrl+B and enter the default password to enter

the BootROM main menu.

BOOTROM MENU

1. Boot with default mode

2. Enter serial submenu

3. Enter startup submenu

4. Enter ethernet submenu

5. Enter filesystem submenu

6. Modify BOOTROM password

7. Clear password for console user

8. Reboot

Enter your choice(1-8):6 //Enter 6 to change the BootROM password.

Modify Bootrom password

Old password: //Enter the old BootRom password

(default: Admin@huawei.com).

New password: //Enter a new BootRom password.

Verify: //Enter the new BootRom password

again.

Save password to Flash...OK!

Save backup password to Flash...OK!

I use the switches S5700-28C-SI and S1700-28FR-2T2P-AC most time of this configuration, and works well.

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S1700-28FR-2T2P-AC Overview

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VLAN: 4 K VLANs

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Contact information:

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Website: http://www.huanetwork.com

List of usernames and passwords for Huawei routers

Find Your Huawei Router Password

Three easy steps to find out your Huawei router's username and password

1 Find Your Huawei Router Model Number

Look in the left column of the Huawei router password list below to find your Huawei router model number.

2 Find Your Huawei Router Username

Look one column to the right of your router model number to see your Huawei router's user name.

3 Find Your Huawei Router Password

You know the drill. Look another column to the right to find your Huawei router's password.

Great! You've found the password and username for your Huawei router! What next?

You can login to a Huawei router in three easy steps:

1 Find Your Huawei Router IP Address

2 Enter Your Huawei Router IP Address Into an Internet Browser's Address Bar

3 Submit Your Huawei Router Username and Password When Prompted By Your Router

For more information on how to login to your Huawei router please see our Free Guides.

Still can't login to your Huawei router even when using the username and password for your router?

Reset Huawei Router Password To Default Settings

(Use this as a last Resort!)

Huawei Router Password List

The Common Problems About the Huawei S2700&3700&5700 Configuration(2)

Question 1 :Does a User Have the Super User Right After Logging In from the Console Port?

Answer 1 :By default, a user that logs in to the switch from the console port has the super user right, which is the highest user right in the system.

If the user configures local authentication and sets a lower user level after logging in from the console port, the user only has the right of the lower user level. If no super user password is configured, the user can run the super command to switch to the super user. If the super user password is configured, the super command does not take effect.

Question 2 : How to Increase the Level of Commands in Different Views?

Answer 2 : By default, a switch has four user levels, ranging from 0 to 3. To increase the level of a command in a view, run the command-privilege level command.

For example, a level 3 user can use the delete or format command in the user view to delete the startup file or format the storage device that saves the startup file. To increase the level of the delete and format commands, create a user account of a higher level and run the following commands:

A command-privilege level 15 view shell delete

Only level 15 users can use the commands starting with delete in the user view (shell).

B command-privilege level 15 view shell format

Only level 15 users can use the commands starting with format in the user view (shell).

Question 3 : How to Repair a Storage Device Where an Exception Occurred?

Answer 3 : Run the fixdisk device-name command to repair the storage device.

The dir command displays information about the specified file or directory on the device. If the command output contains unknown, for example, 30,000 KB total (672 KB free, 25,560 KB used, 3,616 KB unknown), run the fixdisk device-name command to free the space occupied by an unknown application.

The command is not recommended when the system works properly. This command cannot rectify device-level faults.

I use the switch S5710-52C-PWR-EI and S5700-28C-HI most time, also meet the problems, here is some of my experience.

The Common Problems About the Huawei S2700&3700&5700 Configuration(1)

The Common Problems About the Huawei S2700,Huawei3700, Huawei S5700 Configuration

Question 1 : How to Delete the Files in the Recycle Bin?

Answer 1 : Using the reset recycle-bin [ filename ] command, you can delete the files in the recycle bin. The files in the recycle bin cannot be restored after being deleted.

Question 2 : Does the Switch Support the Remote Upgrade of the BootROM?

Answer 2 : The switch supports the remote upgrade of the BootROM.

Log in to the switch where the BootROM needs to be upgraded through Telnet, and then run the upgrade basic-bootrom system-filename command in the system view to upgrade the BootROM.

Question 3 : What Is the Default BootROM Password of the Switch ?

Answer 3 : When the system starts the BootROM, press Ctrl+B within two seconds and then enter the default password to enter the BootROM menu. In versions earlier than V200R001, the default

password is huawei. In V200R001 and later versions, the default password is

Admin@huawei.com.

Question 4 :How to Delete the Configuration Information from the Running Configuration File？

Answer 4 : You can run the reset saved-configuration command in the user view to delete user configuration information from the running configuration file of the switch. After the device restarts, the factory configuration is restored.

Usually, the reset saved-configuration command is used in the following scenarios:

When a configured Switch is applied to a new environment, the original configuration file may fail to adapt to the new environment. In this case, you need to run the reset saved-configuration command to delete the original configuration file and then reconfigure the Huawei Switch.

Huawei S2700&3700&5700 New Software Version V100R005SPH021 Release

On October 30th 2013, Huawei releases its latest S2700&3700&5700 software version V100R005SPH021, Huawei S2700&3700&5700 switch customers with older software version like V100R005SPH020, V100R005SPH019 are encouraged to upgrade to the latest software.

If you already have Huawei S2700&3700&5700 Switches, and you want to upgrade to the newer software version or download related documents, you may contact your previous Huawei switch supplier or Huanetwork.com, Huanetwork Email: sales@huanetwork.com, for customers already purchased Huawei S2700&3700&5700 from Huanetwork.com, please contact your sales representative, Huanetwork.com will provide free new version software for you.

Customers interested in purchasing Huawei S2700 series please refer to below links:

S2700-9TP-SI-AC

S2700-9TP-EI-AC

S2700-18TP-EI-AC

S2700-26TP-EI-AC

S2700-26TP-PWR-EI