104CHAPTER 4: DISCOVERING THE NETWORK
Wireless clients clouds These are shown directly connected to a Wireless access point on your map. They are used to indicate the number of wireless clients connected to the access point.
WAN clouds These are shown on the map between the two end points of a WAN link to indicate the type of a WAN link that 3Com Network Director detected. This also enables you to apply operations independently to each end of the WAN link. Refer to “Using 3Com Network Director On A
The Discovery Process When the first discovery operation is fully complete the information
–Rediscovery 3Com Network Director has obtained will be displayed on the map. You can then instruct 3Com Network Director to perform additional discoveries (rediscoveries). You may wish to do this because:
■There are some additional subnets that you wish to see on your map that either weren’t specified in the original discovery or didn’t exist on your network at the time you performed the initial discovery.
■Some new devices have been added to your existing subnets or some of the existing devices have changed configuration. Many of the administrative tools, such as Device Backup, Restore and Agent Update rely on the device configuration information held by 3Com Network Director in its map database being up to date. Consequently it is a good idea to perform a rediscovery on subnets where you know some of the devices have changed.
When you perform a rediscovery on existing subnets 3Com Network Director will remember and reuse some of the options you specified on the previous discovery, including the selected monitoring options, additional community strings that you specified, the NCPs in your network and the types of devices you want to discover.
When 3Com Network Director performs a second or additional discovery it does not update your map as it progresses. It adds all the information it acquires to a temporary database. This means that you can continue to work with your current map until the new discovery completes, though certain tasks are restricted. Although 3Com Network Director is populating the temporary database with the new information, it does obtain some parameters from the main, working database, for example any community strings that were successfully determined for devices that are subsequently being rediscovered.