[Babel-users] Babel RTT settings for low and high latencies

[Thomas Gambier]

Hello,

we are running re6st a mesh network based on babel. We have almost the 
same setup as you: around 400 machines connected worldwide. Our default 
options for babel are:


max-rtt-penalty 5000
rtt-max 500
rtt-decay 125


See 
https://lab.nexedi.com/nexedi/re6stnet/-/blob/f2fd7247b2b3fa1162072e1928a3ead890ad3369/re6st/registry.py#L171

This setup has proven working very well.

Regards.

Thomas.



On 2024-07-17 14:30, Marek Küthe wrote:
> Hello,
> 
> I have (once again) [1] some questions about babel's rtt:
> I have a network with several servers, which are distributed worldwide
> and connected via WireGuard tunnels. I run Babel as the routing
> protocol between them. Some of the VM's are in the same data center
> (latency < 1ms) and some are very far away (Germany <-> Hong Kong
> 300ms-400ms). Which rtt-min, rtt-max and rtt-cost/max-rtt-penalty would
> be suitable for such a network?
> 
> I would be very happy to receive ideas and suggestions!
> 
> Greetings
> Marek Küthe
> 
> [1] https://www.mail-archive.com/bird-users@network.cz/msg07641.html
> 
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