S3950-4T12S Switch Reset and Recovery System
User Manual

Configuration Considerations

Table 1 products and versions for example.

Network Topology

Operation Steps

1. Connection Equipment

   According to the way of networking topo to connect PC and switch to network

   cable and Console. One end of the RJ-45 network cable is connected to the PC NIC, and the other end is connected to the SW’s network port. Connect one end of the Console line USB to the PC’s USB interface, and the other end of RJ-45 is connected to the console interface of the front panel of the switch.

2. Download Configuration Software

   After the connection is completed, there we recommend the super terminal,

   putty, or Secure CRT tool to configure the switch.

3. Switch on and Use Login Software

   Energizing the switch, then open the installed login software, select the

   serial port of login mode, the port through the device manager to determine. Baud rate:115200, Data bits: 8, Parity: None, Stop bits: 1. (Reference below)
   NOTE: COM Number can be viewed through device manager. (right-click on my computer.>manage>device manager>port (COM and LPT). If it displays an unrecognized USB device, please download and install the corresponding driver.

4. Restoration System
   Set PC IP address
   Then prepare tftp
   *After the connection is completed, power the switch (or power off and restart). During startup, when a countdown prompt appears to enter Uboot mode (as shown in Figure 2), press “Ctrl + B” to enter Uboot mode.

Set ip address
bootrom:> setenv ipaddr 192.168.1.1
bootrom:> saveenv
bootrom:> setenv netmask 255.255.255.0
bootrom:> saveenv
Specify the IP of the TFTP server
bootrom:> setenv serverip 192.168.1.2
bootrom:> saveenv
bootrom:> setenv gatewayip 192.168.1.2
bootrom:> saveenv
Load the mirror boot system from the TFTP server
bootrom:> boot_tftp FSOS-S3950-Series-v6.2.27.r.bin
Enter the system.
……….
Loading startup configuration file…… Done!
Mon Jan 1 00:01:20 UTC 2001
Ready to service!
Switch> enable
Switch#
NOTE:

1. Attention should be paid to the following issues when loading images through TFTP servers :
   • Ensure that you are properly configured as a TFTP server;
   • Ensure that Switch routes to TFTP servers are accessible. If there is no router for routing communication between subnetworks, switches and TFTP servers must be in the same network;
   • Make sure that the configuration files you want to download are in the correct directory on the TFTP server;
   • Download operation to ensure that the file’s permissions are set correctly.

2. After successfully entering the system, it is still necessary to download the upgrade package from the TFTP server to the switch system folder according to the routine process. And specify the upgrade package as the next load project for the system to start. For more information, please refer to the S3950 -4T12S Switches FSOS Software Upgrade Guide.

Switch to Factory Reset
Switch# clear startup-config
Are you sure to delete the startup configuration file? yes/no: yes
Switch# reboot
Building configuration…
The Startup config file does not exist. Copy running-config to Startup config?

Reboot system? [confirm]

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