Start tftp up on a server and put the boot and os flash files in the tftp landing directory

The firmware for the Nortel Networks L2/3 GbESM is contained in two files: one is a boot image file and the other is the OS image file. Use the following steps to upgrade the firmware on the Nortel Networks L2/3 GbESM via the Telnet session:

1. Type /boot/gtimg.

2. Enter where the new image file will be placed. We are upgrading the boot image file, so enter boot. That is the location for the boot image file.

3. Enter the IP address of the TFTP server.

4. Enter the fully qualified path name for the boot image file that is on the TFTP server.

5. The switch reports the current version of the boot kernel on the switch and ask if you wish to replace it with new file. If you wish to continue, enter y.

6. When the download is finished, go back to Step 1, and repeat the process for the OS image file. In step 2, enter image1 or image2 as the location to store the new image file.

7. If the download location is the same as the location for the currently loaded OS image, the switch warns you that a failed download could result in an inoperative switch. If the download location is different from the location of the currently loaded OS image, the image file downloads. After the download is finished, the switch asks whether you want to use the old location or the new location. Figure5-6 on page37 shows a successful download of the OS image to image2.

8. Type /boot/reset to reset the switch and reboot with the new firmware files.