40 CHAPTER 4: GROUPING NETWORK DEVICES IN THE M APAttributes To understand how Traffix Manager groups devices in the Map, it helps tobe familiar with the concepts of attributes and groupings.An attribute is a label for a piece of information about a device: forexample, location or IP address. Traffix Manager has a number ofpredefined attributes; you can change these or add your own.At any one time, each attribute of a particular device is either currentlyunassigned (not defined), or has a single value. For example, the value ofthe location of a device might be Boston, or the location might beunknown, or unassigned.Predefined Attributes There are a number of predefined attributes in Traffix Manager that youcan use to create your own groupings. For these predefined attributes,values are usually assigned automatically as each device is discovered.You cannot delete a predefined attribute, or change its name.Table 5 Predefined AttributesName DescriptionName DNS Name or Network Layer address.NL Type Network Layer protocol.NL Addr Network Layer (IP) address.Network Protocol-specific network number,generated from the Network Layeraddress.Subnet This attribute is set to SubnetsDB ifthe object matches an entry in theSubnetsDB file. Otherwise it isunassigned. See Appendix D, “Usingthe SubnetsDB File”.Discovery Time Time (in seconds, since January 1st1970) when Traffix Managerdiscovered device.Last Activity Time Time (in seconds, since January 1st1970) when the device last sent orreceived traffic.Type Device/Aggregated/DHCP Device.(continued)
