search

cloyne / network

5 stars 5 forks source link

Lower MTU in the network #72

Open mitar opened 8 years ago

mitar commented 8 years ago

To 1458. Because of the tunnel.

mitar commented 7 years ago

We can also try to increase the MTU of the tunnel.

clonm commented 5 years ago

Why 1458? And did this ever get changed?

With the built-in ping speed test, I am noticing significantly higher speeds (like, factor of 2) using 1024 as the big packet size instead of the default 1500. I'm not sure why this is or if it would hold true for servers in general, but it works for two different iperf servers, 8.8.8.8, and whatever internal google node came up when I did a traceroute for google.com from Cloyne.

Currently all the interfaces on CloyneRouter have MTU set to 1500, with L2 MTU calculated as 1520 except for the tunnel which shows up as 65535. The HE router also has the MTUs set to 1500, but L2 MTU set manually to 1598 (again, except for the tunnels).

Do you think it would be worth trying to tweak those? or is the 1598 because you already increased the MTU of the tunnel and/or should we chalk this up to measurement error with automated testing? (Vern should be proud...)

clonm commented 4 years ago

bump - is there any reason to think this is still worth tweaking?