On Thursday, February 05, 2015 17:22:53 Sven Eckelmann wrote: > The current default settings for optional features in batman-adv seems to be > based around the idea that the user only compiles what he requires. They > will automatically enabled when they are compiled in. For example the > network coding part of batman-adv is by default disabled in the out-of-tree > module but will be enabled when the code is compiled during the module > build. > > But distributions like Debian just enable all features of the batman-adv > kernel module and hope that more experimental features or features with > possible negative effects have to be enabled using some runtime > configuration interface.
Interesting point. Based on what you are saying we definitely should review our policy and agree on sane defaults. > The network_coding feature can help in specific setups but also has > drawbacks and is not disabled by default in the out-of-tree module. > Disabling by default in the runtime config seems to be also quite sane. This feature requires the wifi driver to support promisc mode. We should keep it disabled. > The distributed_arp_table is in theory a good solution to reduce connection > problems in large networks caused by ARP packet loss. Unfortunatelly, it > seems to also break ARP resolution in simple mesh setups. The only solution > which seems to be used by AP firmwares seems to be the deactivation of this > feature. Disabling this feature by default until the problem was understood > and fixed may help new deployments to create a working mesh. Tuning of the > mesh can still be done by them in case DAT works in their setup. I vote for keeping DAT enabled. > The bridge_loop_avoidance is the only feature which is disabled by default > but may be necessary even in simple setups. Packet loops may even be > created during the initial node setup when this is not enabled. This is > different than STP on bridges because mesh is usually used on Adhoc WiFi. > Having two nodes (by accident) in the same LAN segment and in the same mesh > network is rather common in this situation. Agreed. Cheers, Marek
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