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    Monitoring the Service Traffic Statistics of Layer 3 VPN Services for Correlating Device Counters

    You can view the Service Traffic page of a specific service to examine and diagnose the transmission details of packets and the metrics on forwarded or received packets. The interface statistical counters display the number of packets and bytes sent and received from interfaces that are associated with the devices of the service. A pictorial representation of the links in a point-to-point service topology is also shown. You can also view a bar chart of the class-of-service (CoS) queue information for physical interfaces. For rate-limited interfaces hosted on Modular Interface Cards (MICs), Modular Port Concentrators (MPCs), or Enhanced Queuing DPCs, rate-limit packet-drop operations occur before packets are queued for transmission scheduling. For such interfaces, the statistics for queued traffic do not include the packets that have already been dropped due to rate limiting, and consequently the displayed statistics for queued traffic are the same as the displayed statistics for transmitted traffic.

    For rate-limited interfaces hosted on other types of hardware, rate-limit packet-drop operations occur after packets are queued for transmission scheduling. For these other interface types, the statistics for queued traffic include the packets that are later dropped due to rate limiting, and consequently the displayed statistics for queued traffic equals the sum of the statistics for transmitted and rate-limited traffic.

    Note: The values and statuses of the parameters displayed in the graphs and tables of different widgets are refreshed, based on the polling interval configured on the Monitoring tab of the Preferences page (accessible by clicking the down arrow beside the System button on the Connectivity Services Director banner and selecting Preferences).

    To view the Service Traffic page for an L3VPN service:

    1. Select Service View from the View Selector.
      The workspaces that are applicable to routing and tunneling services are displayed on the View pane.
    2. From the Junos Space user interface, click the Monitor icon on the Connectivity Services Director banner.
      The functionalities that you can configure in this mode are displayed on the task pane.
    3. From the Service View pane, on the left, click the plus sign (+) next to Network Services to expand the tree and display the different service types that you can configure.

      The Network Services tree is expanded and displayed on the View pane.

    4. Click the plus sign (+) beside Connectivity to view services based on protocols.

      The Connectivity tree is expanded and displayed on the View pane.

    5. Expand the L3VPN Services tree to select a Layer 3 VPN Ethernet service.
    6. Click the ServiceTraffic tab.

      The Service Traffic page is displayed.

    The following widgets are displayed on the Service Traffic tab.

    Figure 1 shows the Service Traffic tab for an L3VPN service.

    Figure 1: Service Traffic Page for an L3VPN Service

    Service Traffic Page for an
L3VPN Service

    Interface Statistics

    This monitor is displayed for Layer 3 VPN services. In this monitor, the interface statistics denote the traffic data on all the UNI or site interfaces associated with the service. These values are on-demand statistical values and the data is retrieved from the device directly without being cached (polling at periodic intervals and displaying a snapshot). It is supported for L3VPN services. The following fields are displayed in a table:

    • Device Name—Name of the device

    • Interface—Name of the interface

    • Packets In—Number of packets received on the interface

    • Packets Out—Number of packets sent from the interface

    • Bytes In—Number of bytes received on the interface

    • Bytes Out—Number of bytes sent from the interface

    From the Automatic Refresh list, select Disabled, Every 30 Seconds, Every 45 Seconds, or Every 1 Minute to specify the frequency at which the statistics in the table must be updated and displayed. When you disable the auto-refresh capability, the page is not refreshed periodically by itself; instead you can click the Refresh icon to update the table contents for viewing.

    VPN Traffic Trend

    This monitor is displayed for L3VPN services. A line chart is displayed with time on the horizontal axis and the number of output packets on the vertical axis.

    From the Time Interval drop-down box, select 1 Hour, 8 Hours, 1 Day, 1 Week, 1 Month, 3 Months, 6 Months, 1 Year, or Custom to specify the duration for which the data polled from devices needs to be displayed. If you select the Custom option, the Time range popup dialog box is displayed. Specify the date from the calendar, and select the Time From (Start time in the 24-hour time format of collection of data), and Time To (End time in the 24-hour time format of collection of data). Click OK to save the settings. Else, click Cancel to discard the configuration.

    Modified: 2017-07-20