Hi All,
I was wondering if anyone had some advice on how to troubleshoot this issue.
We have 20 locations all connected via IPSEC LAN-to-LAN using a mix of Draytek 2830s and 2860s. For some reason 4 of the sites have all started dropping out at once periodically for roughly 5-10mins and then come back up on their own accord, it's always the same sites and they don't seem to have anything in common.
2 x sites ADSL
2 x sites FTTP 70/70Mbps
I can see the latency going up really high until ping responses time out however when the network drops the VPN tunnels remain connected according to the connection manager on the head office router, I can't browse the the web interface of the routers via their WAN address or internal address.
It's my opinion that whatever the issue is it's originating from our head office (all other sites are much smaller...