UDR when Next Hop is unreachable

Lei Tian (letian) 20 Reputation points
2024-08-24T19:06:43.48+00:00

Hello,

I have UDR defined with NVA as the next hop type. I noticed when NVA is unreachable, the route table doesn't invalidate the UDR. Is there a way to remove the route when the defined next-hop UDR is unreachable?

Thanks,

Lei Tian

Azure Virtual WAN
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An Azure networking service that is used to provision private networks and optionally to connect to on-premises datacenters.
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Accepted answer
  1. hossein jalilian 6,440 Reputation points
    2024-08-24T20:41:26.84+00:00

    Thanks for posting your question in the Microsoft Q&A forum.

    Unfortunately, Azure does not automatically invalidate or remove user-defined routes when the specified next hop becomes unreachable

    UDRs are static routes that are manually configured and take precedence over system routes. They do not automatically update based on the reachability of the next hop.

    Azure does not perform health checks or reachability tests on the next hop specified in a UDR.

    Set up your own health monitoring system to check the availability of the NVA. If the NVA becomes unreachable, you can programmatically update or remove the UDR using Azure APIs or automation tools.

    Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful

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