Use this procedure to recover a frozen console prompt. It helps restore console access when the prompt stops responding during setup or troubleshooting.
Use this task to recover frozen console prompt.
Problem:
The console access is frozen and does not respond. In this state, no output or input characters are displayed on the console.
Cause:
The Priority Flow Control (PFC) functionality is enabed on the console by default. The PFC is also referred to as Class-based Flow Control (CBFC) or Per Priority Pause (PPP) is a mechanism that prevents frame loss due to congestion. Pressing the Ctrl + S keys enables the flow control and no output will be seen on the XR console until resumed.
Solution:
Reset the console prompt.
Before you begin
Follow these steps to recover frozen console prompt.
Procedure
Press the |