User's Manual

Key Considerations 809
Potential Hazards
when using Restore
and Setup
The Device Restore and Setup operations initialize most types of device
prior to applying the software configuration. The initialization of a device
that is connected to your network can cause network loops. It is
particularly likely that a network loop will occur if the target devices are
configured with any of the following features prior to the start of the
operation:
■ VLANs
■ Spanning Tree
■ Aggregated Links
■ Resilient Links
3Com strongly recommends that you isolate target devices from the rest
of the network and connect them directly to the management station
before using Restore or Setup.
Why Errors can Occur
during Restore and
Setup
A common reason for the failure of a Device Restore or Setup operation is
a loss of contact with the target device. This can occur either when the
device is initialized prior to configuration or while the device is being
configured. If this happens, please ensure that the target device is either
connected directly to the management station or is connected to the
management station through a simple unmanaged hub or switch.
If the restored configuration you are applying results in ports being
disabled, you will also need to ensure that the device is connected to the
management station through a port that does not become disabled
when the configuration is applied.