Tag Archives: Network engineering

Error: please renew the default configrations [How to Solve]

Please revert to the default configuration

When you are prompted to revert to the default configuration when configuring the switch, you need to delete the original configuration step by step and reconfigure the switch.
Reconfigure the switch, if you configure it directly, it will report an error

Example

Original configuration

port link-type access
port default vlan 500

The configuration that needs to be changed

interface GigabitEthernet0/0/28
undo port link-type  
undo port default vlan 500 
port link-type trunk 
 port trunk allow-pass vlan 2 to 4094

The NPF driver isn’t running. You may have trouble capturing or listing interfaces

The processing method of “the NPF driver isn’t running. You may have trouble capturing or listing interfaces (as shown)” appears in Wireshark packet capturing tool

First of all, you have to make sure that you have installed WinPcap (it’s better to download the latest version: official download, which seems to be unable to be opened by the official, and it can also be downloaded by the Chinese Army)

a. If you are using Linux or Ubuntu, please use & gt$ The Su administrator command switches to the account with the highest authority, and then enters the command: “net start NPF” (if not, find a similar command yourself). b. If you are using Windows XP/me, please use the administrator account to log in, open CMD, and enter the command: “net start NPF”. You will be prompted to open the driver service successfully. c. If you are using Windows Vista or windows 7 that I tried out, please find the file cmd.exe under “C::?Windows?System32”, right-click and select “run as administrator”, and then enter the command “net start NPF” in the command line mode to successfully open the NPF driver. It should be that the npf.sys file I found earlier has been opened.

Finally, turn on Wireshark again, and “bingo” will work normally.

See