On 01/03/2013 12:14 PM, Marek Lindner wrote:
On Thursday, January 03, 2013 23:01:07 Jan Lühr wrote:
Ah! You failed to mention this part in your initial email.
The behavior is easily explained: batman-adv does not switch gateway whenever a new gateway is found (even if it is a better gateway) unless the selection class is on fast or late switching.
It is. - Sorry, forgot to mention: Freifunk-b0487acb2d58:~# batctl gw_mode client (selection class: 1)
=> 1 -> fast connection consider the gateway's advertised throughput as well as the link quality towards the gateway
You did mention you were using selection class 1. I was referring to your test in which you turn on/off your best gateway. As I explained in my previous mail: batman-adv does not switch the gateway once it has chosen a gateway unless you select fast or late switching as selection class. Selection class 1 does not fall into this category which means a gateway reselection only happens if the currently selected gateway disappears.
Marek, could you please clarify this?
From the man page I don't see an option that would behave as Jan (and I) seem to be expecting it to work. That is: switch to a better gateway - with more bandwidth and comparable link quality - when it's available.
gw_mode|gw [off|client|server] [sel_class|bandwidth] [...] If the node is a gateway client the parameter will decide which criterias to consider when the batman-adv module has to choose between different internet connections announced by the afore- mentioned servers. default: 20 -> late switch (TQ 20) examples: 1 -> fast connection consider the gateway's advertised throughput as well as the link quality towards the gateway 2 -> stable connection chooses the gateway with the best link quality and stick with it (ignore the advertised throughput) 3 -> fast switch connection chooses the gateway with the best link quality but switches to another gateway as soon as a better one is found XX -> late switch connection chooses the gateway with the best link quality but switches to another gateway as soon as a better one is found which is at least XX TQ better than the cur- rently selected gateway (XX has to be a number between 3 and 256).
Would mode 3 accomplish this fast switching? It doesn't mention if this mode will consider advertised throughput or not; only selection class 1 mentions throughput.
-- NicoEchániz