156 CHAPTER 5: WORKING WITH THE MAPThe map and the tree work in conjunction with each other. When youselect a device, subnet or device group within the tree it is also selected inthe map and vice versa. Once you have made your selection: you can usethe pull-right menu, in either the tree or the map, to perform an actionon that item.Components The following section describes the principal features of the map and thetree and the operations you can carry out from them.Map Structure The map provides two basic views of your network topology, dependingupon whether or not you choose to view the devices in your networkgrouped by subnet or as individual devices. Within each view you cannavigate around the map, and focus on particular areas of the topologythat are of interest to you.To change from one view to another, toggle View > Group Map bySubnet.The GroupedNetwork ViewThe default view shows the devices in your network logically grouped byIP subnet. This view is hierarchical, consisting of:■ The top-level map — This map presents a logical layer-3 view of yournetwork, showing the routers and layer-3 switches, the links betweenthem, and which IP subnets they are logically connected to.■ Submaps — These present logical groupings of the devices on yournetwork. There are two types of submap:■ Subnets — are automatically created by 3Com Network Directorduring Network Discovery, and allow you to view the networkbroken down into separate IP subnets. Each subnet contains alldevices with related IP addresses.
