6.2.4 Subnet connection rules

List-based discovery only

For list-based discovery, NNMi uses the subnet connection rules to detect connections that span a WAN. NNMi evaluates the subnet membership of the device it has discovered on each end of a probable connection (by examining their IP addresses and subnet prefixes) and looks at subnet connection rules for a match.

Rule-based discovery only

When auto-discovery rules are enabled and NNMi finds a device configured with a subnet prefix between /28 and /31:

1. NNMi checks for an applicable subnet connection rule.

2. If a match is found, NNMi uses each valid address in the subnet as a hint and attempts discovery on that address.

   Tip

   Use the default connection rules. Modify them only if there is a problem.

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