Authentication Options - Motorola MOSCAD 68P02958C00-B User Manual

Note: Force All Links can be used to define keys for all the links and then certain links can be
modified in order to vary the authentication and limit the motility of the data.
The authentication keys are not saved on the disk. When the Network Configuration utility is
exited, the authentication keys are erased from the ToolBox. Yet it may be difficult to
remember which authentication keys were downloaded to the Flash memory of the RTU.
Therefore, a name or key alias may be defined for each authentication key to remind the user
of the key without compromising the integrity of the authentication. To define a key alias, type
a string in the Alias field.
Click OK to save the key definitions or Cancel to exit without saving. . If you close the Define
Keys and Aliases dialog using the OK button, the Has Keys/Has Aliases buttons to the right of
the entry in the Links Authentication Information will be marked with a check.

Authentication Options

To set the advanced parameters for Authentication, select the Authentication Options
command from the Edit menu. The range of values for each parameter is specified between <
> symbols. For example, <1-200> means that the value can be a number between 1 through
200. You can specify a value greater than the maximum value, in which case the system only
issues a warning message. Exceeding the range may consume additional memory and may
cause unexpected or incorrect behavior in the RTU. The default is automatically entered in
the parameter field and appears between square brackets (for example: [80]). You can change
this value.
TX Stamp Interval (seconds) <5-1800>
This parameter defines the interval between two consequent generations of an authentication
stamp for transmission. A higher value saves CPU time but at the same time decreases the
protection of the authentication mechanism, since an authentication stamp generated at a given
instant will be used to authenticate all the outgoing frames in the next TX Stamp Interval
seconds.
TX Periodic Server SYNC Interval (seconds) <60-30000>
This parameter defines the interval between two periodic SYNC messages sent by a Server or
a Client-Server. A lower value will decrease the clock drift between any two CPUs in the
network, but will increase the communication overhead on the network.
RX Periodic Sync Interval (seconds) <120-60000>
This parameter defines the interval between two expected SYNC messages. It is relevant to
Client and Client-Server operation modes. If an expected SYNC message does not arrive at an
RTU within this time interval, it will send a SYNC request message to its known Server. In
case of a Client-Server, if an expected periodic SYNC message does not arrive, the RTU will
not send any periodic SYNC messages on those Links it serves, until it succeeds in requesting
SYNC from its Server and receiving a valid response. It is recommended that this value be set
to at least twice the value of Server TX Periodic SYNC Interval.
TX Sync Request Retry Interval (seconds) <10-30000>
This parameter defines the interval between two consecutive retries to transmit a SYNC
request and receive a valid response. It is relevant to Client and Client/Server operation
modes. The request is used by the RTU after restarting (to initially get the Server's clock) and
also when (for some reason) the periodic SYNC message is not received, or not properly
authenticated.
5-68
Network Configuration
[150]
[1800]
[3600]
[20]