On Fri, 27 Oct 2023 17:35:24 +0200 Juliusz Chroboczek <[email protected]> wrote:
> The recommended default values are much more conservative: > > rtt-min 10 > rtt-max 120 > > This causes RTTs below 10ms to be considered as all equally good, and > links above 120ms to all be considered as equally bad. The result is that > minor oscillations of the metrics of high-rtt links do not cause cost > fluctuations, which avoids oscillations. Thanks for the explanation! I have to admit that I didn't quite know what the default values did before. > It is of course possible that these values are not appropriate in your > network; however, I fear that the extremely aggressive values that you > describe above may cause unnecessary oscillations, especially since BIRD > does not yet implement hysteresis on metrics. I hope it's okay if I ask something about such an old e-mail. I have a network where sometimes it comes to an RTT of 1ms (when nodes are next to each other) and sometimes it comes to 300ms (Europe <-> Hong Kong). In this case I would use something like `rtt-max 300`. Which rtt-cost would you recommend? > > -- Juliusz -- Marek Küthe [email protected] er/ihm he/him
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