Hello,
Am 03.01.2013 um 17:05 schrieb Marek Lindner:
On Thursday, January 03, 2013 23:52:42 Jan Lühr wrote:
Well, I started echoing on the underlying VPN-connection as well and changed the chart-titles for clearance:
In chart 4 and chart 5 RTT / Loss from kif.kbu to node-1 is measured. In chart 4 kif is sending ICMPv6 to the link-local address of bat0-interface - in chart 5 the link_local address of the underlying vpn-interface is used.
All tests are from the same node to the same node using exactly the same means (protocols, etc) with the exception of batman-adv ? Sorry for my dumb question but your topology might be obvious to you but isn't for me (us?).
yes.
The spikes on your graphs show the packet loss ?
yes.
How can we have a RTT < 50ms while experiencing packet loss ?
Collectd uses a ping rate of 10 seconds here, RTT >= 0.9s = 900ms is "loss" If 1/3 arrives in < 50ms and 2/3 are lost, RTT is < 50ms while loss = 2/3.
Btw. I you wanna see our setup, we can take a tour via ssh / tmux - I can provide the rrd-Files, too. You can contact my by jabber (yanosz@jabber.ccc.de) as well,
Thanks, Keep smiling yanosz