Synergy mode in HA with active connections

Product Discussion Feature Requests
1

I have the following setup:

  • 2 B310 routers in HA mode
  • 2 BR1 (Mini) devices, connected over 2 switches to the B310s
  • The B310s set up a Speedfusion tunnel to a Fusionhub

When setting the two B310 routers in HA with config sync, it takes 30s to fail over to the slave B310 after failure of the master B310, due to the setup time of the Speedfusion tunnels.

When disabling config sync and enabling “Establish Connections in Slave Role” with a separate Speedfusion tunnel with higher cost metric, this failover time gets reduced to only a few seconds.

However, this is only possible when using the BR1s in regular mode, as an ethernet WAN interface. When using synergy mode, which gives more fine-grained controls in tunnel set-up, the slave B310 cannot use them to keep tunnels over those connections maintained. After a while (again +30s) the slave B310 becomes the synergy controller over those BR1s and starts using them to setup the tunnel.

Especially for mobile HA solutions, I think it should be made possible for both units in a HA pair to maintain tunnels over a synergized device.

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2

Actually, this is the 35s time it takes for the new master to become synergy controller:
image

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3

I’m curious if you have tried this setup in 8.6? I know there are some architectural changes to synergy mode in this version so I would be curious to see if there is an improvement on this? I’m not sure either way, but I think theres a good chance it can help. I think this also fits into your previous request about HA transition times, also probably worth working directly with us on a ticket here too.

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4

Hi Travis,
I tried in 8.6.0 build 6428. I’ll create a ticket, thanks!

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5

Hi @Travis, see ticket 26060936. Working with @TK_Liew on this. Thanks.

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