Using Crosh To Diagnose Network

Use the following steps to test the network adapter in crosh:

Power on the Chromebook or Chromebox and sign in to your account.
Close any open programs or tabs.
Press the ctrl + alt + t keys to open crosh.

Crosh opens in a new browser tab.

Figure : Crosh tab
Type network_diag into crosh, and then press enter.

Figure : Crosh network diagnostics test command
Wait while crosh performs a set of network diagnostic tests. A diagnostic screen displays the results of the network adapter health test.

Figure : Crosh network diagnostic test results

The diagnostic test log is saved as a .txt (plain text) file in the Files app.

Figure : Network diagnostics test log
If the diagnostic test returns a failure message, make sure the Wi-Fi adapter is enabled.

Figure : Crosh network diagnostic test - example of failure
Close the tab to exit crosh.