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Access network design for branch, remote, outdoor, and campus locations with HPE Aruba Networking access points and mobility controllers.
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GRE between controllers and the loop possibility

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  • 1.  GRE between controllers and the loop possibility

    Posted Nov 16, 2023 10:43 PM

    Hi guys, so i have a customer with 2 sites deployment (DC and DMZ) where the DMZ only acts as data anchor for internet access.

    i'm not using multizone, but we use GRE tunnels between controllers to forward the traffic.
    here is the topology:

    i would like to make all 4 GREs as active for faster failover so i dont put them in the same tunnel group.
    my question is:
    1. how do I prevent the possibility of loops? since STP won't work in the GRE tunnel as i recall.
    2. if the controllers are not in cluster, they would be active-passive. would the passive controller has the tunnel up or it will wait until failover to active?

  • 2.  RE: GRE between controllers and the loop possibility

    Posted Nov 17, 2023 09:31 AM

    The tunnel configuration option "no inter-tunnel-flooding" instructs the controller to not forward traffic received on a tunnel into another tunnel.


    Carson Hulcher, ACEX#110