GRE/gif/netgraph tunnel speed on 10Gbit channel

[Vitalij Satanivskij]

Am 29.05.2018 um 13:33 schrieb Vitalij Satanivskij:

MM> Can you try MTU 1400 on GRE0 and MSS of 1300 just for testing?
MM> With this values I get 4600Mbit sending and 1400Mbit receiving with 
MM> iperf and 10 parallel streams.
MM> 

UUUPSS looks like i have problem with metodology 

I'm use iperf3 and even with -P10 or run's in parallel (on diferents ports) it show summary of +-2gbits max

While iperf v2 show 4+gbit's 

[ ID] Interval       Transfer     Bandwidth
[ 11]  0.0- 0.0 sec  0.00 Bytes  0.00 bits/sec
[ 10]  0.0-20.0 sec   910 MBytes   382 Mbits/sec
[  9]  0.0-20.0 sec   503 MBytes   211 Mbits/sec
[  8]  0.0-20.0 sec  1.66 GBytes   714 Mbits/sec
[ 12]  0.0-20.0 sec  2.25 GBytes   965 Mbits/sec
[  7]  0.0-20.0 sec   368 MBytes   154 Mbits/sec
[  6]  0.0-20.0 sec  1.90 GBytes   815 Mbits/sec
[  5]  0.0-20.0 sec   900 MBytes   378 Mbits/sec
[  4]  0.0-20.0 sec   833 MBytes   349 Mbits/sec
[  3]  0.0-20.0 sec  1.11 GBytes   478 Mbits/sec
[SUM]  0.0-20.0 sec  10.4 GBytes  4.44 Gbits/sec


It's very strange for me but at last it mutch more beter. 

Ok now question is - which maximum speed we can get from gre on 10Gbit link's. ^)