H3C Technologies H3C Intelligent Management Center - Manual (Page 279)

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9 VPN monitoring
This chapter explains the NTA VPN monitoring features. It provides an overview of how NTA analyzes
network flow data from the viewpoint of a VPN, and it describes the report structure for VPN traffic
analyses. It reviews configuration issues around VPN analysis tasks and the reports they generate. It
describes the process for adding VPN traffic analysis tasks, including instructions for adding, modifying,
and deleting VPN tasks in NTA. Finally, it describes the summary reports for all VPN tasks and the more
detailed reports for an individual VPN traffic analysis task.
VPN traffic analysis overview
VPN traffic analysis tasks capture and analyze network flow data for VPNs. In general, the NTA's VPN
traffic analysis tasks provide traffic statistics for the VPNs configured in a VPN traffic analysis task. The
VPN traffic reports include rate of traffic for all VPNs in all tasks and for all VPNs in a task. VPN statistics
include traffic rate by application, source host, destination host, and a session or source/destination host
pair. These reports are organized into layers from summarized information for all tasks to detailed
reporting for specific VPNs configured for an individual VPN traffic analysis task.
VPN traffic analysis reporting overview
After you create the first VPN traffic analysis task, NTA creates an entry called VPN Traffic Analysis
Task under the Traffic Analysis and Audit area on the left navigation tree.
Click VPN Traffic Analysis Task on the left navigation tree to view the summary report for all VPN traffic
analysis tasks.
Move your mouse pointer to the shortcut menu icon to the right of VPN Traffic Analysis Task. The
VPN Traffic Analysis Task shortcut menu appears to display all VPN traffic analysis tasks created in NTA.
Click the name link for a task to view the VPN traffic analysis report of the task.
The summary VPN traffic analysis report provides the following information:
• Average Rate (Last 1 Hour)—Summarizes the average rate per second reporting for all VPNs
specified in all VPN traffic analysis tasks summarized by task. Each bar in the graph is a link to
more detailed reporting for the selected task, including reporting for traffic rates, application,
source, destination, and session statistics. Each of these detailed report types also include several
reports for the selected task:
{
Traffic—Reports found under the Traffic tab for VPN reporting include traffic trends that display
the average inbound and outbound rate per second and the individual data samples for the
VPNs for the selected task.
{
Application—Reports found under the Application tab for VPN reporting include a tabular
report displaying percentage of application traffic generated by all VPNs in a task and a graph
displaying average rate of application traffic for all VPNs in the selected task.
{
Source—Reports found under the Source tab for VPN reporting include inbound and outbound
reports. Both reports include a pie chart displaying the percentage of traffic generated by the
TopN source hosts and a table displaying volume and percentage of traffic generated for each