Update ADSL firmware on Cisco 877

This article explains how to update the ADSL firmware on a Cisco 877.

Download File and Put on TFTP server

  • You will need to download the latest firmware – you can do this from the Cisco website (if you have a smartnet contract) or you can download from http://www.alcatron.net/cisco877/firmware/. The version I have downloaded is ADSL_ALC_20190.4-0-018.bin
  • You will need to rename the file to ADSL_ALC_20190.bin
  • You will need to have a TFTP server installed on your PC (such as solarwinds TFTP). Copy the renamed file into your TFTP directory

Upload to Cisco Router

Connect to the router via a console cable. Enter the below commands to upload to the router.

yourname#copy tftp flash

Address or name of remote host []?

Source filename [adsl_alc_20190]? adsl_alc_20190.bin

Destination filename [adsl_alc_20190.bin]?

Accessing tftp://…

Loading adsl_alc_20190.bin from (via Vlan1): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[OK – 993760 bytes]

993760 bytes copied in 8.484 secs (117133 bytes/sec)

Reload and Verify

Reload the router. You can then verify the adsl version by entering

show dsl interface

If there is a problem for some reason you can roll back to the original firmware by entering

delete adsl_alc_20190.bin

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