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Troubleshooting Guide

CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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What Should I Do Upon a Failure to Log In to a Switch Through Third-Party Terminal Emulation Software?

What Should I Do Upon a Failure to Log In to a Switch Through Third-Party Terminal Emulation Software?

By default, flow control is disabled on a switch. When logging in to a switch through the console interface using third-party terminal emulation software, you need to deselect flow control parameters on the third-party terminal emulation software to ensure that flow control parameter settings on both ends are the same. Otherwise, the login fails. SecureCRT is used as an example to describe how to disable flow control.
  1. Click to create a connection, as shown in Figure 22-91.

    Figure 22-91 Creating a connection
  2. Set the connected interface and communication parameters, as shown in Figure 22-92.

    Select the serial interface that is connected to the switch on your PC. For example, on a PC running a Windows OS, you can view interface information in Device Manager.

    Communication parameter settings on the terminal emulation software must be the same as the default values on the switch, which are: 9600 bit/s baud rate, 8 data bits, 1 stop bit, no parity check, and no flow control.

    By default, no flow control mode is configured on the switch. Because RTS/CTS is selected in the software by default, you need to deselect RTS/CTS; otherwise, you cannot enter commands.

    Figure 22-92 Setting the connected interface and communication parameters

A PC may have more than one serial interface. Select the interface to which the console cable is connected.

If you modify the serial interface communication parameters on the switch, modify the communication parameters on the PC to ensure that they use the same communication parameter settings, and then set up the connection again.

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Updated: 2020-01-07

Document ID: EDOC1000060766

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