Network topology and LAN and WAN network models
LAN and WAN networks do not have a well-known identifier, such as an IP address or mask for an IP subnet. These networks are characterized by the physical and logical connections between the nodes on the network and the infrastructure network devices (switches, hubs) that enable the devices to communicate with each other. In the common data model, LANs and WANs represent an aggregate of the IP subnets.
Example of modeling a LAN network
The following figure illustrates a LAN that aggregates IP subnets:
Example of modeling a WAN network
The following figure illustrates an example of a WAN that aggregates IP subnets:
Illustrative model of a WAN 
Logical identity of BMC_LAN
You can model a virtual LAN by using the BMC_LAN class and setting its isVirtual attribute to Yes. The following table describes key attributes of BMC_LAN:
Attribute | Usage |
|---|---|
Name | Identifies the LAN, computed from the list of IP subnets that make up the LAN. The name for the LAN is the lexicographically lower value of the names of IP subnets. |
NameFormat | Specifies the heuristic method used to generate the Name value, which must be set to OID (object identifier). |
Logical identity of BMC_WAN
The following table describes key attributes of a BMC_WAN:
Attribute | Usage |
|---|---|
Name | Identifies the WAN, computed from the list of IP subnets that make up the WAN. The name for the WAN is the lexicographically lower value of the names of the IP subnets. |
NameFormat | Specifies the heuristic used to generate the Name value, which must be set to OID (object identifier). |
WANType | Specifies the enumeration that describes the type of technology used:
|