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公开(公告)号：US11949584B2
公开(公告)日：2024-04-02
申请号：US18185644
申请日：2023-03-17
发明人： Tarek Saad , Jonathan C. Barth
摘要： An ingress network device may receive a core domain network segment identifier associated with a core domain network of the multi-domain network. The ingress network device may receive location data of an egress network device associated with a second leaf domain network of the multi-domain network, wherein the location data may include data identifying the core domain network segment identifier, a second leaf domain network segment identifier associated with the second leaf domain network, and an egress network device segment identifier associated with the egress network device. The ingress network device may store the core domain network segment identifier and the location data, and may utilize the core domain segment identifier and the location data to route traffic to the egress network device.
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公开(公告)号：US20230142996A1
公开(公告)日：2023-05-11
申请号：US18148769
申请日：2022-12-30
IPC分类号： H04L41/0806 , H04L41/0668 , H04L45/745 , H04L47/125 , H04L47/724 , H04L61/2592 , H04L47/10 , H04L61/5007
CPC分类号： H04L41/0806 , H04L41/0668 , H04L45/745 , H04L47/125 , H04L47/724 , H04L61/2592 , H04L47/10 , H04L61/5007 , H04L45/50
摘要： In general, techniques are described for signaling IP path tunnels for traffic engineering using constraints in an IP network. For example, network devices, e.g., routers, of an IP network may compute an IP path using constraint information and establish the IP path using, for example, Resource Reservation Protocol, to signal the IP path without using MPLS. As one example, the egress router generates a path reservation signaling message that includes an egress IP address that is assigned for use by the routers on the IP path to send traffic of the data flow by encapsulating the traffic with the egress IP address and forwarding toward the egress router. As each router in the IP path receives the path reservation signaling message, the router configures a forwarding state to forward traffic encapsulated with the egress IP address to a next hop along the IP path toward the egress router.
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公开(公告)号：US11252082B1
公开(公告)日：2022-02-15
申请号：US17097549
申请日：2020-11-13
IPC分类号： H04L12/707 , H04L12/721 , H04L12/26 , H04L12/715 , H04L12/751
摘要： An example network element includes one or more interfaces and a control unit, the control unit includes one or more processors configured to determine an egress network domain identifier (ID) and determine an abstracted interdomain network topology. The one or more processors are also configured to determine one or more interdomain paths from an abstracted ingress domain node to an abstracted egress domain node and determine whether an abstracted domain node is on the one or more interdomain paths. The one or more processors are configured to, based on the abstracted domain node being on the one or more interdomain paths, include one or more resources within a network domain in a filtered traffic engineering database (TED) and compute a path from an ingress node within the ingress network domain to an egress node within the egress network domain based on the filtered TED.
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公开(公告)号：US20210392014A1
公开(公告)日：2021-12-16
申请号：US17458039
申请日：2021-08-26
发明人： Raveendra Torvi , Abhishek Deshmukh , Kireeti Kompella , Tarek Saad , Vishnu Pavan Beeram , Ronald Bonica
IPC分类号： H04L12/437 , H04L12/24 , H04L12/723
摘要： A ring node N belonging to a resilient MPLS ring (RMR) provisions and/or configures clockwise (CW) and anti-clockwise (AC) paths on the RMR by: (a) configuring two ring node segment identifiers (Ring-SIDs) on the ring node, wherein a first of the two Ring-SIDs (CW-Ring-SID) is to reach N in a clockwise direction on the ring and a second of the two Ring-SIDs (AC-Ring-SID) is to reach N in an anti-clockwise direction on the ring, and wherein the CW-Ring-SID and AC-Ring-SID are unique within a source packet routing in networking (SPRING) domain including the ring; (b) generating a message including the ring node's CW-Ring-SID and AC-Ring-SID; and (c) advertising the message, via an interior gateway protocol, for receipt by other ring nodes belonging to the ring such that (1) a clockwise multipoint-to-point path (CWP) is defined such that every other one of the ring nodes belonging to the ring can be an ingress for the CWP and such that only the node is an egress for the CWP, and (2) an anti-clockwise multipoint-to-point path (ACP) is defined such that every other one of the ring nodes belonging to the ring can be an ingress for the ACP and such that only the node is an egress for the ACP.
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5.发明申请公开(公告)号：US20210258249A1
公开(公告)日：2021-08-19
申请号：US16794190
申请日：2020-02-18
IPC分类号： H04L12/721 , H04L12/715
摘要： Support is provided for flexible algorithms, used by the border gateway protocol (BGP) route selection process, in the context of segment routing (SR) Prefix segment identifiers (SIDS) advertised using BGP.
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公开(公告)号：US20210029021A1
公开(公告)日：2021-01-28
申请号：US16589115
申请日：2019-09-30
IPC分类号： H04L12/729 , H04L12/707 , H04L12/751 , G06F16/23
摘要： At least one bandwidth-guaranteed segment routing (SR) path through a network is determined by: (a) receiving, as input, a bandwidth demand value; (b) obtaining network information; (c) determining a constrained shortest multipath (CSGi); (d) determining a set of SR segment-list(s) (Si=[sl1i, sl2i . . . slni]) a that are needed to steer traffic over CSGi; and (e) tuning the loadshares in Li, using Si and the per segment-list loadshare (Li=[l1i, l2i . . . lni]), the per segment equal cost multipath (“ECMP”), and the per link residual capacity, such that the bandwidth capacity that can be carried over CSGi is maximized.
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7.发明授权公开(公告)号：US12034635B2
公开(公告)日：2024-07-09
申请号：US17589539
申请日：2022-01-31
CPC分类号： H04L45/34 , H04L49/3009
摘要： The same prefix segment identifier (SID) may be configured and/or used for either (A) more than one prefix within an interior gateway protocol (IGP) domain, or (B) one prefix with more than one path computation algorithm within the IGP domain by: (a) receiving, by a node in the IGP domain, an IGP advertisement including both (1) a prefix SID and a segment routing global block (SRGB) slice identifier; (b) determining whether or not the SRGB slice identified by the SRGB slice identifier is provisioned on the node; and (c) responsive to a determination that the SRGB slice identified by the SRGB slice identifier is not provisioned on the node, not processing the prefix SID included in the received IGP advertisement, and otherwise responsive to a determination that the SRGB slice identified by the SRGB slice identifier is provisioned on the node, (1) processing the prefix SID and SRGB slice to generate a unique, per SRGB slice, MPLS label for the prefix, and (2) updating a label forwarding information base (LFIB) for the node using the unique, per SRGB slice, label for the prefix and the prefix.
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公开(公告)号：US11811651B2
公开(公告)日：2023-11-07
申请号：US17150082
申请日：2021-01-15
IPC分类号： H04L45/302 , H04L45/44 , H04L45/50 , H04L45/58
CPC分类号： H04L45/302 , H04L45/44 , H04L45/50 , H04L45/583
摘要： A disclosed method may include (1) receiving, at a network node within a network, a packet from another network node within the network, (2) identifying, within the packet, a slice label that indicates a network slice that has been logically partitioned on the network, (3) determining a QoS policy that corresponds to the network slice indicated by the slice label, (4) applying the QoS policy to the packet, and then upon applying the QoS policy to the packet, (5) forwarding the packet to an additional network node within the network. Various other apparatuses, systems, and methods are also disclosed.
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公开(公告)号：US11411866B1
公开(公告)日：2022-08-09
申请号：US17164282
申请日：2021-02-01
发明人： Jonathan C. Barth , Shraddha Hegde , William Britto Arimboor Joseph , Vishnu Pavan Beeram , Tarek Saad
摘要： In some implementations, a network device may identify a segment routing traffic engineering (SR-TE) algorithm supported by the network device. The network device may determine, based on identifying the SR-TE algorithm, an identification value associated with the network device. The network device may generate an advertisement packet that includes the identification value and information identifying the SR-TE algorithm. The network device may send the advertisement packet to another network device to cause the other network device to update a data structure to indicate that the network device supports the SR-TE algorithm and that the network device is associated with the identification value. The other network device may determine, using the SR-TE algorithm, a forwarding path for a data packet that indicates the network device as a hop in the forwarding path.
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10.发明申请公开(公告)号：US20220182314A1
公开(公告)日：2022-06-09
申请号：US17589539
申请日：2022-01-31
摘要： The same prefix segment identifier (SID) may be configured and/or used for either (A) more than one prefix within an interior gateway protocol (IGP) domain, or (B) one prefix with more than one path computation algorithm within the IGP domain by: (a) receiving, by a node in the IGP domain, an IGP advertisement including both (1) a prefix SID and a segment routing global block (SRGB) slice identifier; (b) determining whether or not the SRGB slice identified by the SRGB slice identifier is provisioned on the node; and (c) responsive to a determination that the SRGB slice identified by the SRGB slice identifier is not provisioned on the node, not processing the prefix SID included in the received IGP advertisement, and otherwise responsive to a determination that the SRGB slice identified by the SRGB slice identifier is provisioned on the node, (1) processing the prefix SID and SRGB slice to generate a unique, per SRGB slice, MPLS label for the prefix, and (2) updating a label forwarding information base (LFIB) for the node using the unique, per SRGB slice, label for the prefix and the prefix.
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