Weird latency pinging via OpenVPN
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Had a strange experience today on ly L2L connection to one of the remote sites. Both 2.4.5-p1
The ICMP time to sw-01 (via vpn) on the remote site is usually around 220ms , but this morning it exploded to 1000+ ms even 1800ms.
I asked the remote site to check the Inet connection , and they had no alarms.
I dug a bit around in the OVPN logs and saw nothing.
When i got back to the problem after lunch , i still had those issues 100+ ms ping time , and alarms on my Zabbix.
I decided to start allow icmp from my central site to the remote site's WAN ip , and was quite "stunned when it was around 220ms" , but a ping inside the VPN still 1800ms .....
In desparation i restarted the central openvpn daemon from "Services" , and afer a client reconnect. I also had 220ms pingtime inside the tunnel.
I have this in both ends:
fragment 1450; mssfix 1450;
And have 5 other L2L OVPN tunnels wo. this issue.
What could have happened here , that a "OVPN server restart fixed" ??
Edit: CPU load in both ends approx 5..10% , 20% Ram used
/Bingo