Route update question
jgmehta at ncsu.edu
Fri Oct 30 23:40:49 CET 2015
I am using my own protocol and wanted to understand more about handling of
route update. When my protocol receives a route, I inform the core using
rte_update() and pass on the new route and when I need to delete I set new
= NULL and call rte_update().
1. This is the initial route that was installed in the table.
Route1 10.0.1.0/24 Metric : 10
2. Received a better route with Metric as 5, so i call rte_update and pass
on the new route. So now, I have
Route1 10.0.1.0/24 Metric: 5
3. Protocol again receives an update to delete the cost 5 route (step 2) .
However when I do that, I see that I no longer have any route to 10.0.1.0/24
instead of having a higher cost route (cost 10 ).
When I enable debug, I see that during delete, when we fall through
rte_recalculate() in core code, net->routes is being set to null and so we
never do recalculation for new optimal route. Is there something I need to
do after we call rte_update() to install route so I save the old_best route.
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