Product Documentation

Dynamic Paths for Branch to Branch Communication

Aug 09, 2017

With demand for VoIP and video conferencing, the traffic is increasingly moving between offices. It is inefficient to set up full mesh connections through datacenters which can be time consuming.

With NetScaler SD-WAN, you do not need to configure paths between every office. You can enable the Dynamic Path feature and the SD-WAN solution automatically creates paths between offices on demand. The session initially uses an existing fixed path. And as bandwidth and time threshold is met, a path is created dynamically if that new path has better performance characteristics than the fixed path. Session traffic is transmitted through the new path. This results in efficient usage of resources. Paths exist only when they are needed and reduce the amount of traffic getting transmitted to and from the datacenter.

Additional benefits of SD-WAN network include:

•       Bandwidth and PPS thresholds to allow branch to branch connections

•       Reduce bandwidth requirements in and out of data center while minimizing latency

•       Paths created on demand depend on set thresholds

•       Dynamically release network resources when not required

•       Reduce load on the Master Control Node and latency 

Branch to Branch Communication Using Dynamic Paths

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SD-WAN Network with Dynamic Path

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  • Dynamic virtual paths are used for large scale deployments, such as Enterprises
  • Smaller deployments use Static virtual paths and any-to-any virtual paths
  • Always use Static virtual paths between two Data Centers (DC to DC)
  • Not all WAN paths need to be configured for using Dynamic virtual path
  • Each SD-WAN appliance has limited number of Dynamic virtual paths (8 dynamic lowest limit, 8 static lowest limit = total 16) that can be configured.

How to Enable Dynamic Virtual Path in the SD-WAN GUI

To enable dynamic virtual paths:

  1.  In the NetScaler SD-WAN GUI, under the Connections pane, create a WAN to WAN Forwarding Group.
  2.  Navigate to Connections [Client Site Name]WAN to WAN Forwarding.

               a)   Enable WAN to WAN Forwarding to enable the site to serve as a proxy for multi-hop site to site.

               b)   Enable Site as Intermediate Node

      3. Navigate to Connections Remote SiteWAN to WAN Forwarding.

               a)   Enable WAN to WAN Forwarding to enable the site to serve as a proxy for multi-hop site to site.

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     4.   Navigate to Connections Remote SiteVirtual PathDynamic Virtual Path.

               a)    Enable Dynamic Virtual Paths.

               b)    Set the maximum number of dynamic paths.

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How to Create a Dynamic Virtual Path

  • Configuration determines when a Dynamic Virtual Path is active or down.
  • Configure sample packet count (pps) or bandwidth (kbps) within a timeframe.
  • Can be set Globally or with WAN Link configured at the Intermediate Node.
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