US 12,170,613 B2
Segment routing MPLS point to multipoint path
Huaimo Chen, Bolton, MA (US); and Donald Eggleston Eastlake, III, Apopka, FL (US)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Guangdong (CN)
Filed on Jan. 3, 2023, as Appl. No. 18/149,514.
Application 18/149,514 is a continuation of application No. PCT/US2021/024973, filed on Mar. 30, 2021.
Claims priority of provisional application 63/047,755, filed on Jul. 2, 2020.
Prior Publication US 2023/0143419 A1, May 11, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 45/50 (2022.01); H04L 45/122 (2022.01); H04L 45/16 (2022.01); H04L 45/24 (2022.01); H04L 12/28 (2006.01)
CPC H04L 45/50 (2013.01) [H04L 45/122 (2013.01); H04L 45/16 (2013.01); H04L 45/24 (2013.01); H04L 12/28 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method implemented by an ingress node in a Multiprotocol Label Switching (MPLS) network, the method comprising:
receiving a packet;
duplicating the packet to generate a copy of the packet;
pushing onto the packet a first segment list describing a segment routing point to multipoint (SR P2MP) path as a list of multicast segment identifiers (SIDs) each comprising a multicast adjacency label;
pushing a second segment list onto the copy of the packet;
transmitting the packet from a downstream interface along the SR P2MP path; and
transmitting the copy of the packet from a second downstream interface, wherein the first segment list and the second segment list describe different sub-trees of the SR P2MP path.