Recommendation: The frequency of subnet discovery should be set to once daily. However, if the subnet has roaming or mobile users (users that move between subnets and therefore require frequent updates of local policies), then a more frequent discovery time should be considered.
The Election Method should be carefully chosen to suit the characteristics of a subnet. The following table provides recommendations for choosing which Election Method to use with the Discovery process:
|
Election Method |
Method Used |
Effect on Defined IP |
Impact to CA TM Server |
Recommendation |
|---|---|---|---|---|
|
Free Election |
CA TM Server sends an UDP-directed broadcast to the subnet. |
Only used to test ability to broadcast to a subnet. |
Medium |
Medium, due to the requirement to open broadcast across the network |
|
Biased Election |
CA TM Server sends a UDP directed broadcast to the subnet. |
If available, this node responds with the subnet discovery results to the CA TM Server. |
Medium |
Medium, due to the requirement to open broadcast across the network. |
|
Specified Election |
A defined CA TM Client within a subnet sends a UDP directed poll packet to the subnet and responds to the CA TM Server with the results. |
The defined IP must have the CA TM Client installed. This is usually a print or file server. |
Low |
High, however it does require a live CA Client within each defined subnet. |
|
Sweep Poll |
CA TM Server attempts to contact every IP within a subnet using a UDP poll packet. |
Only used to test connectivity. |
High |
Low, due to the overhead on the CA TM Server. |