Repository : ssh://git@open-mesh.org/doc

On branches: backup-redmine/2017-07-13,master

commit 9deab2295454ff044f878722abc153945fb92f2c Author: Linus Lüssing linus.luessing@c0d3.blue Date: Fri Jun 24 02:56:44 2011 +0000

doc: batman-adv/OGM

9deab2295454ff044f878722abc153945fb92f2c batman-adv/OGM.textile | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/batman-adv/OGM.textile b/batman-adv/OGM.textile index fd9489c0..3bf568fd 100644 --- a/batman-adv/OGM.textile +++ b/batman-adv/OGM.textile @@ -167,6 +167,8 @@ More precisely we have do:

Note that neither applying this outdated Router purging harms loop-freeness as we would Select a new Router with a higher sequence number in section 5.3. and again, the Router that would be selected next or any next hop behind it would not have selected us or will not select us due to them not being allowed to switch back to a lower sequence number again. Nor is this purging of outdated Routers needed to ensure loop-freeness. It is just an optimization for certain scenarios as described previously.

+Also note, that this step can result in rebroadcasting an OGM in step 5.3. which is not the one we have actually received and are currently processing - which is intended: This incoming OGM might be the cause of purging outdated entries, however there might be still other loop-free Routers in the Router list which have a higher path TQ and are therefore more desirable to chose as the new Selected Router than the Router we received this OGM from. + h4. 5.3. Switching to (or Keeping) best Router

This step ensures a good Router selection to the best knowledge of a node. As the Router list only keeps potential, loop-free nodes (due to steps 4.2.2 and 5.4) which are further not too old (due to step 5.2) we can now freely choose any node from this list. If in this round we got an OGM of a Router which we did not and will not chose as the Selected Router (due to a lower path TQ, although it would be feasible to chose it due to a newer sequence number of this OGM), than we just updated this Routers values, without selecting it. Instead the next steps will chose the same old Router (which is not the one we received the current OGM from) again - but will avoid rebroadcasting the OGM of the old, though still best old and newly Selected Router, due to the Rebroadcasted flag.