#9 Viper_SC_Manual_
001-5008-000_Rev12e.docx |
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network. Auto-Scan mode could generate a large number of neighbor discovery control messages in a large Viper SC
network. CalAmp recommends Auto-Scan be limited to Viper SC networks of two to ten units. If Auto-Scan mode is
used, be aware that the Neighbor Discovery learning process may slow responses in SCADA networks from remote
units or capture the RF channel so remotes cannot respond to a Master.
―
Disabled.
In the disabled state, Viper does not send neighbor discovery packets nor does it process neighbor discovery
packets generated by other Vipers. The user can enter static entries in the Neighbor Table. Disabled is recommended in
projects where the customer does not want RF paths to deviate from RF engineered, or site survey completed paths.
4.8.1.1
LOCAL STATUS
Discovery Mode represents the mode of operation of the remote device. There are five states of operations reported in the
local status display: Ready, Scanning for Neighbors, Disabled, Saving Neighbor Table, and Testing Connectivity.
―
Ready.
The neighbor discovery module is in a “Ready” state when it is not scanning for other units. If the Viper SC is
operating in Manual-Scan, it does nothing. If the Viper SC is operating in Auto-Scan, it monitors the “keep alive”
packets of other units and sends its own “keep alive” packet periodically.
―
Scanning For Neighbors.
The neighbor discovery module is trying to learn about other units. Other units are learning
about this unit.
―
Saving Neighbor Table.
In this state, the Viper SC is saving all neighbor entries of type "Dynamic" into. Nvram. When
the save is complete, all these entries are now of type "Locked". This state only occurs when the neighbor discovery
module operates in Manual-Scan mode.
―
Testing Connectivity.
The neighbor discovery module is verifying the Viper SC units in the neighbor table are reachable
by sending them an alive-request and waiting for an alive-response. Round trip time must not exceed 10 seconds. The
alive-request is only sent once.
―
Disabled.
The neighbor discovery module is disabled.
Local Status also reports the number of
Neighboring Vipers Found
and the
Discovery Duration
, which is
the time it took for
the Viper unit to complete the neighbor discovery learning process.
4.8.1.2
DISCOVERED VIPER NEIGHBORS
Each entry in the Table represents a remote Viper. The table displays information about the remote device and information
about the route to each remote device.
4.8.1.2.1
INFORMATION ON NEIGHBORING VIPER
―
RF MAC Address.
Identifies each entry uniquely. The user can click the RF MAC Address entries to display the details of
the selected device in the Neighbor Node Detail window.
―
RF IP Address and Ethernet IP Address.
Used to build the routing table.
