US 12,107,755 B2
Method and a device for routing traffic along an IGP shortcut path
Ilana Staretz-Arie, Pardesia (IL); Eliyahu Shmidt, Kiryat Ono (IL); Alexander Gelberger, Ashdod (IL); and Tamir Gal, Nofit (IL)
Assigned to DRIVENETS LTD., Raanana (IL)
Appl. No. 17/617,693
Filed by DRIVENETS LTD., Raanana (IL)
PCT Filed May 21, 2020, PCT No. PCT/IL2020/050556
§ 371(c)(1), (2) Date Dec. 9, 2021,
PCT Pub. No. WO2020/250213, PCT Pub. Date Dec. 17, 2020.
Claims priority of provisional application 62/859,747, filed on Jun. 11, 2019.
Prior Publication US 2022/0255838 A1, Aug. 11, 2022
Int. Cl. H04L 45/02 (2022.01); H04L 12/46 (2006.01); H04L 45/24 (2022.01); H04L 45/42 (2022.01); H04L 45/50 (2022.01); H04L 45/748 (2022.01)
CPC H04L 45/04 (2013.01) [H04L 12/4633 (2013.01); H04L 45/24 (2013.01); H04L 45/42 (2013.01); H04L 45/50 (2013.01); H04L 45/748 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for routing communication traffic along a path in a communication network, being an Interior Gateway Protocol (IGP) shortcut, wherein the method comprising:
(a) providing an IGP shortcut prefix to a routing entity;
(b) storing the IGP shortcut prefix in a Routing Information Base (RIB) of the routing entity;
(c) associating a new flag with a Label-Switched Path (LSP) that is associated with the IGP shortcut prefix, wherein that newly added flag is adapted to indicate whether said LSP is configured to enable conveying the communication traffic towards its destination when implementing Multiprotocol Label Switching (MPLS) connectivity in the communication network;
(d) storing information that relates to the new flag at the RIB of the routing entity;
(e) identifying one or more of said LSPs associated with respective IGP shortcut prefixes, which qualify as candidates to convey the communication traffic towards the communication traffic destination, wherein the one or more qualified LSPs are each associated with a flag indicating that the respective one or more qualified LSPs are MPLS reachable;
(f) selecting an LSP suitable for serving as a next hop routing path for conveying the communication traffic, wherein the selection is made from among qualified LSPs; and
(g) forwarding the communication traffic towards its designation along the selected path.