Canon imageRUNNER ADVANCE C3330 Series Service Manual page 154

When entering and exiting Deep Sleep, this machine is electrically disconnected from the network. Therefore, when connected
to a hub with the spanning tree feature, communication with the network is disabled for up to about one minute after exiting from
Deep Sleep.
Therefore, immediately after exiting from Deep Sleep, symptoms such as not being able to acquire device status, print, or log in
with a log-in application may occur. If these symptoms cause problems, take one of the following measures:
• Do not enter Deep Sleep from Settings/Registration.
Preferences > Timer/Energy Settings > Sleep Mode Energy Use > High.
• Disable the spanning tree feature in the hub.
• Request the user to install a hub supporting RSTP (Rapid Spanning-Tree Protocol) that resolves this issue.
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2. Technology