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SonicOS Enhanced 4.0 Administrator Guide
Step 6 Click Apply.
Caution It is imperative that you download the corresponding SonicPoint image for the SonicOS
firmware version that is running on your SonicWALL. The mysonicwall.com Web site
provides information about the corresponding versions. When upgrading your SonicOS
firmware, be sure to upgrade to the correct SonicPoint image.
Automatic Provisioning (SDP & SSPP)
The SonicWALL Discovery Protocol (SDP) is a layer 2 protocol employed by SonicPoints and
devices running SonicOS Enhanced. SDP is the foundation for the automatic provisioning of
SonicPoint units via the following messages:
• Advertisement – SonicPoint devices without a peer will periodically and on startup
announce or advertise themselves via a broadcast. The advertisement will include
information that will be used by the receiving SonicOS device to ascertain the state of the
SonicPoint. The SonicOS device will then report the state of all peered SonicPoints, and
will take configuration actions as needed.
• Discovery – SonicOS devices will periodically send discovery request broadcasts to elicit
responses from L2 connected SonicPoint units.
• Configure Directive – A unicast message from a SonicOS device to a specific SonicPoint
unit to establish encryption keys for provisioning, and to set the parameters for and to
engage configuration mode.
• Configure Acknowledgement – A unicast message from a SonicPoint to its peered
SonicOS device acknowledging a Configure Directive.
• Keepalive – A unicast message from a SonicPoint to its peered SonicOS device used to
validate the state of the SonicPoint.
If via the SDP exchange the SonicOS device ascertains that the SonicPoint requires
provisioning or a configuration update (e.g. on calculating a checksum mismatch, or when a
firmware update is available), the Configure directive will engage a 3DES encrypted, reliable
TCP based SonicWALL Simple Provisioning Protocol (SSPP) channel. The SonicOS device will
then send the update to the SonicPoint via this channel, and the SonicPoint will restart with the
updated configuration. State information will be provided by the SonicPoint, and will be
viewable on the SonicOS device throughout the entire discovery and provisioning process.
SonicPoint States
SonicPoint devices can function in and report the following states:
• Initializing – The state when a SonicPoint starts up and advertises itself via SDP prior to
it entering into an operational or stand-alone mode.