SD-WAN

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Ask questions and share experiences with SD-WAN and Session Smart Router (formerly 128T).

  • 1.  How much bandwidth overhead is required for 128T router control and management traffic?

    Posted 02-11-2018 00:00
    As I understand it, a 128T router that is managed by a conductor and peering with other 128T routers, generates a certain amount of control plane traffic (BFD) and management plane traffic (stats, analytics, configuration, SW upgrades, etc.). ¾ Assuming default control plane/BFD settings, and no management activity such as config changes, stats polling, or incoming SW upgrade, any idea how much bandwidth will be taken up by these functions?


  • 2.  RE: How much bandwidth overhead is required for 128T router control and management traffic?

    Posted 02-11-2018 00:00

    Greg,

    Thank you for reaching out.

    Our default BFD settings utilize ~4 kbps to measure path availability and health.

    Standard Communication with the conductor utilizes ~7 kbps. Please note that if you have an HA conductor, this number doubles as we maintain independent connectivity to each conductor.

    So overall with an HA Conductor, you'll see ~18 kbps utilization for BFD/management during steady state, normal operation.

    Let us know if you require any additional information

     

    Thomas Sullivan



  • 3.  RE: How much bandwidth overhead is required for 128T router control and management traffic?

    Posted 02-11-2018 00:00

    BFD communication is only between 128T routers that share a peering relationship. The communication between the 128T router and its associated Conductor(s) is comprised of keep alive messages as well as entitlement computations.