USG 310/IPSec Error Packet(UDP) cannot be sent. reason: Network congestion
due to the current Homeoffice situation my company is running a lot more VPN Connections then usual.
Usually we are running about 6 or 7 IPSec IKE/IKev2 Site2Site Connections and about 5-10 IKEv2 Client2Site.
Now we have round about 20 additional Client2Site Connections and everything was running fine for 2 weeks until yesterday.
Suddenly some VPNs (S2S and C2S) disconnected and were unable to reconnect until we rebooted the firewall.
I noticed these Error in the Logs: