Realtime - network topology viewer

Question

Hello guys,
is it possible to see realtime network topology viewer without collecting data manually. because everytime my device down , i have to click "perform data collection button " to see realtime network topology. without pressing it, looks like our device still up. 

Answer 1

You should not set data collection to less than 5 minutes. It will likely be continually be consuming resources on your server and adversely affect performance (usability).
Here is the relevant section from the above reference (the same documentation should be available with your server):
Scheduling Data Collection
Data Collection runs automatically when you add, or delete devices in the Unified Device Manager (UDM).
You can also schedule the day and time of data collection using this feature.
You can start data collection immediately for all or failed devices and schedule data collection for all devices. All devices is a default option. You can select the Failed devices option to run data collection for failed devices.
To schedule data collection:
Step 1 Select Admin > Collection Settings > Data Collection > Data Collection Schedule.
The Data Collection Schedule dialog box appears.
Step 2 Modify the data collection settings as described in Table 6-2.
Table 6-2     Data Collection Schedule Settings
Field
Description
Usage Notes
Schedule
Days, Hour, Min
Days on which and the time at which data collection is scheduled.
The optimum data collection schedule depends on the size of the network and the frequency of network changes.
The default data collection schedule is every 4 hours, on the 4-hour mark, daily: 04.00, 08.00, 12.00, 16.00, 20.00, 24.00 Note that time is in the 24-hour format.
•Select a schedule and click Edit to edit the schedule.
•Select a schedule and click Delete to delete the schedule.
•Click Add to add a new schedule.
Step 3 Click OK to save the changes or click Cancel to exit.
Best Practices
Be cautious while scheduling Data Collection:
•Data Collection consumes significant resources on the network management system.
•Use the Polling option to see the device and link status without running data collection. For more details on polling see, Data Collection Critical Device Poller
Data Collection Critical Device Poller
LMS polls the entire network for device and link status periodically.This feature allows you to:
•Configure the time interval at which the network is polled.
•Poll only a critical set of devices.
Use this option to see the device and link status without running Data Collection.
Since Data Collection consumes significant system resources, you can simply poll the network and view the device and link status in Topology maps.
Adding Critical Devices to the Device Poller
To add a device to the Critical Devices list from Topology Map:
Step 1 Launch a Topology map.
Step 2 Right click a device and select Add device to Critical Poller.