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  • 1.  flow redirection and asymmetric flows

    Posted Oct 25, 2024 12:10 PM

    Hi,

    Do I need to configure/enable 'flow redirection' in an Edgeconnect HA deployment to avoid asymmetric routing? or is it only a feature to use with traditional HA deployment?

    thanks



  • 2.  RE: flow redirection and asymmetric flows

    Posted Oct 28, 2024 07:24 AM

    EdgeHA (the setup where you have an HA cable and it shows up as HA in the Orchestrator) doesn't need flow redirection active. What EdgeHA does is pass through the interfaces on the Stdby appliance as logical interfaces to the active appliance. As a result, all flows will end up on the active appliance regardless of the interface it came in on.

    p6 of this guide warns against it.


    Original Message


  • 3.  RE: flow redirection and asymmetric flows

    Posted Oct 28, 2024 09:34 AM
    That's right EdgeHA is not suitable for ECMP deployment and thus should never have asymmetric routing present. EdgeHA is design with the assumption that one EdgeConnect will be Primary and the other Backup. However this does not apply to the wan-side labels. The two ECs in the EdgeHA pair share the wan-side labels across the EdgeHA link. 

    Also keep in mind that Flow Redirection narrowly applies to Boosted TCP traffic only. It has no impact on non-boosted or udp-boosted traffic   

    -AP



    Original Message


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