Srw2024 !EXCLUSIVE! Downloading Code Using Xmodem Transfer

How to Download Code Using Xmodem Transfer on Linksys SRW2024 Switch

If you have a Linksys SRW2024 switch that needs a firmware upgrade, you may encounter some issues if you try to use the web interface or the regular console cable. In this article, we will show you how to download code using Xmodem transfer on this switch using a special cable and a software called Putty.

What is Xmodem Transfer

Xmodem is a protocol for transferring files between two devices over a serial connection. It was developed in the late 1970s and is still used for some applications that require simple and reliable data transmission. Xmodem divides the file into blocks of 128 bytes and adds a checksum and a sequence number to each block. The receiver acknowledges each block by sending back an ACK or NAK signal. If a block is corrupted or lost, the sender will retransmit it until it is received correctly.

Why Use Xmodem Transfer on Linksys SRW2024 Switch

The Linksys SRW2024 switch is a 24-port gigabit switch that supports web-based management and PoE. However, some users have reported problems when upgrading the firmware on this switch using the web interface or the regular console cable. This is because the switch requires a boot firmware update before applying the OS firmware update. If you skip this step, the switch may become unresponsive and inaccessible.

To recover the switch, you will need to use Xmodem transfer to upload the correct boot firmware via the console port. However, you cannot use the standard Cisco console cable for this purpose, as it is a null modem cable that has the RX and TX pins flipped. You will need a straight through or modem serial cable that has all pins 1 to 1. You can either buy one or make one by using two Cisco console cables and an inline RJ45 coupler.

How to Download Code Using Xmodem Transfer on Linksys SRW2024 Switch

Here are the steps to download code using Xmodem transfer on Linksys SRW2024 switch:

Download the old firmware \"runtop-10086.ros\" from Cisco website or other sources.

Download Putty version 0.60 from here. This version of Putty has the Xmodem transfer function that you will need.

Connect your straight through serial cable to the switch using baud rate 38400, 8-N-1.

Power on the switch and press RETURN or Esc when you see \"Autoboot in 2 seconds\" message.

Type \"download -b xmodem\" and press enter. This will put the switch in Xmodem download mode.

Open Putty and select \"Serial\" as connection type. Enter the same baud rate and port number as your serial cable.

Click \"Open\" and then click \"Yes\" to accept the security alert.

In Putty window, press Ctrl-A followed by C. This will open a dialog box for selecting file transfer protocol.

Select \"Xmodem\" and click \"OK\". Then browse to the location of your firmware file \"runtop-10086.ros\" and click \"Open\".

The Xmodem transfer will start and you will see the progress on both Putty window and switch console. Wait until it finishes successfully.

After the transfer is done, type \"boot\" and press enter on switch console. This will reboot the switch with the new boot firmware.

You can now access the web interface or use another console cable to upload the OS firmware update using tftp or scp protocols.

Congratulations! You have successfully downloaded code using Xmodem transfer on Linksys SRW2024 switch. ec8f644aee