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VPN Path Tracing

VPN path tracing allows you to see the routing path between two nodes belonging to a VPN. A VPN path trace can be performed by selecting the Path Trace option of the right-click menu in the VPN Topology View. To use this feature, right-click over the source node, select Path Trace, and then click the destination node. The routing path details will then be shown on the main topology map. The following figure shows the VPN path trace feature being performed between CE_piscataway and another node of the VPN.

Figure 1: VPN Path Tracing in VPN ViewNetwork topology diagram with AS65534 and multiple nodes. Highlighted PE_piscataway node shows options for node detail, config, VPN, and path trace. Route targets: Exports 65101:65001, Imports 65101:65001.

VPN Path Tracing in Import/Export Relations View is performed in a similar fashion. Right-click over a group, and select Path Trace to reveal a drop-down menu of PEs and CEs (if any), as shown in the following figure. Double-click to select a particular PE or CE as the source node. Then do the same to select the destination node.

Figure 2: VPN Path Tracing in Import/Export Relations ViewNetwork diagram showing data flow from GREY_MGMT_VPN_WANDL node to nodes labeled E_PE_RT01, E_PE_RT02, CE, E_GI_CE01, and E_GI_CE02.

Alternatively, a VPN path trace can be performed between PEs (and CEs if managed) of a VPN via the Network > Path & Capacity > Path menu as shown in the following figure.

Figure 3: Demand Path windowSoftware interface window titled Demand Path for network configuration between Node A set to 1_DUBLIN and Node Z set to 2_AMSTERDAM with fields for IP addresses, owner set to Any, and buttons for node highlighting and path display.

To perform a VPN path trace instead of a regular path trace, first choose the desired VPN from the Owner dropdown selection. Note that if the VPN is not listed in the owner selection, you should at it first from the VPN window as described in Forming VPN Customer Groups. Click on Highlight All to display all the nodes for the selected VPNNext, click on two of the highlighted nodes in order to see the routing being performed. PEs are highlighted yellow, and CEs (if any) are highlighted blue.