Link-layer notifications

OLSR is designed to work independent of what communication hardware it runs on top of. This means that all link detection and maintenance is done on a relatively high layer of the OSI^4.1 model.

One could however imagine taking other variables, gathered from the lower layers, into consideration if available. This could be information from the link-layer which describes the quality of links. RFC3626 allows for usage of this kind of information in link sensing. This information can be used to detect link breakage at an earlier stage than the other OLSR mechanisms and to add robustness to link-sensing by setting a threshold for accepting links.