Feature #4285
closed
Temporary FIB entry
0%
Description
Allow forwarding strategies such as self-learning (#4279) to create FIB entries and FIB next hop records.
These entries and records are deemed temporary; they will expire after a period of time specified by the strategy when inserted, unless renewed by repeating insertion.
A strategy may only create a FIB entry or next hop record if the FIB entry's name prefix is within the strategy's jurisdiction, as indicated in strategy choice table. The temporary FIB entries and next hop records should be deleted when strategy choice is changed.
Updated by Junxiao Shi about 7 years ago
- Blocked by Feature #4284: FIB EndpointId column added
Updated by Junxiao Shi about 7 years ago
- Blocks Feature #4279: Self-learning strategy added
Updated by Junxiao Shi about 7 years ago
- Description updated (diff)
This is one of the trickiest issues to implement NDN self-learning. The main difficulty is: NFD-RIB assumes it solely controls the FIB, but this is no longer the case.
Although the experiment code given in #4279-1 lets the strategy itself manage an internal FIB, this isn't allowed as per NFD devguide because strategy must be stateless, otherwise there could be undefined behavior when runtime strategy change occurs.
Furthermore, exposing the temporary FIB to NFD's main FIB provides valuable diagnostic information in fib/list dataset. Having "strategy's internal FIB" would not allow an operator to observe the complete FIB through nfdc fib list.
Updated by Alex Afanasyev about 7 years ago
Aren't we already have timeouts on RIB entries? Why it cannot be simply accomplished using short-term RIB entry?
Updated by Junxiao Shi about 7 years ago
Why it cannot be simply accomplished using short-term RIB entry?
- RIB is in a different thread that forwarding has no access to.
- FIB updates via RIB are asynchronous. Self-learning requires FIB updates to complete synchronously. Otherwise, it would unnecessarily flood a subsequent Interest.
Updated by Teng Liang almost 7 years ago
- Blocks deleted (Feature #4279: Self-learning strategy)
Updated by Davide Pesavento almost 7 years ago
- Assignee deleted (
Yanbiao Li) - Target version deleted (
v0.7)
This should be rejected if self-learning is going to use a different mechanism (i.e. measurements table entries).
Updated by Junxiao Shi about 6 years ago
- Blocked by deleted (Feature #4284: FIB EndpointId column)