We have 3 primary sites, they have XG125 and Custom hardware 4-core 6GB RAM boxes, all running 18.5.1.
There are 7 branch sites, each has 3 RED tunnels, to the main 3 sites above.
Ever since we upgraded to 18.5.1, it seems like when a Branch or Main site has the WAN GW flicker (ISP issues), the RED tunnel shows status "online" but there is NO communication with the web GUI over the RED tunnel and sometimes, no communication with any branch local IP across the tunnel.
The only thing I've found that is able to re-establish the tunnel is to restore the Branch site XG from a backup.
Has anyone experienced this? LIke I said, everything was running for a year without issue.
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