User manual

Appendix D – Recovering From a Failed Upgrade

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Wait for the recovery procedure to complete and the SG unit to finish reprogramming.

Note

It takes a few minutes for your SG to finish reprogramming. After it has finished it reboots

automatically with its old configuration intact. If it is uncontactable after rebooting, hit the

Reset/Erase button twice within 2 seconds to restore factory default configuration, then

follow the instructions in the chapter entitled Getting Started to begin reconfiguration of

your unit.

Recovery using a BOOTP server

The following is a brief guide to performing a recovery boot when you are unable to

access either Netflash or a Windows PC on which to run it. More comprehensive

instructions are not given, as they vary depending on your operating system and server

software packages.

The recovery procedure involves network booting the unit using a BOOTP server with

access to a SG firmware image file, then upgrading the network as per a normal flash

upgrade to reprogram its flash to a usable state.

Note

To perform the recovery boot, you must have a firmware image for your SG unit. The

firmware that shipped with your unit is located in the \firmware directory on the SG CD.

The latest firmware for your SG unit can be obtained from SG customer support

Firmware files have the format Model_Version_Date.sgu or Model_Version_Date_*.sgu.

stop and start the servers.

Place the firmware file in your BOOTP server’s path, e.g.: /tftpboot/

Edit your BOOTP server configuration to contain an entry for the SG unit. Specify the

firmware file as the file to boot, e.g.:

filename "SG300_v2.1.3_20041213.sgu";