On Wed, Dec 16, 2015 at 10:17:54AM +0100, Gabriele Beltrame wrote: > Hi, > > I'm running a few Strongswan 5.3.* CentOS (Kernel 3.16.7, 4.2.6, 4.1.*) > instances on AWS to terminate VPNs between each other and/or to other > devices across the Internet. > While investigating some application issues, I've noticed that on every VPNs > I have random packet losses (from 1% to 4% over 100 to 300 requests sent). > This only happens when the two following conditions are met: (a) AES > encryption used, (b) IP packet size shorter than about (150+8+20)Bytes.
I've never seen this. If xfrm statistics are compiled in, a counter is bumped for each packet dropped by IPsec. You can check these counters in /proc/net/xfrm_stat. This will tell you at least whether IPsec is the reason for your packet loss. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
