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High Availability not working?

We have 2x SG320's in hot standby mode. Each one is plugged into a separate Cisco 2960s switch which is configured correctly for this use.

Failing over doesn't work. We tried again today and the UTM is still syncing some 6 hours later.

Any idea?



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  • I had a similar issue and configuration. I was advised by Support that while HA can work over a switch, the preferred method is via a crossover cable. I put in a crossover cable last night and my issue with HA immediately went away. Are you on 9.4x perchance? It was only after this update that we had issues with HA.

  • The interfaces are connected via a switches but the HA is directly connected to each other via a normal straight cat5e.
    I haven't used a crossover cable as I assume the interfaces autodetect. It does work although I'm unsure is this may be the issue?