# US 2021/0243115 A1 · Wireless control and fabric links for high-availability cluster nodes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243115 A1 - Document ID: US20210243115A1 - Status: Published application - Kind: A1 - Application number: 17/302,091 - Filed: 2021-04-23 - Published: 2021-08-05 - Earliest claimed: 2019-06-13 - Assignees: Juniper Networks, Inc. - Applicants: Juniper Networks, Inc. - Inventors: Ashok Babu VASTHOLIL; Vinayaraju B; Sasikumar SEKAR - Web page: https://patentgrep.com/patent/US20210243115A1 ## CPC - H04L 45/28: using route fault recovery - H04W 76/15: Setup of multiple wireless link connections - H04W 40/00: Communication routing or communication path finding - H04W 40/32: for defining a routing cluster membership - H04W 56/002: {Mutual synchronization} - H04W 76/10: Connection setup - H04L 49/253: using establishment or release of connections between ports - H04L 49/557: {Error correction, e.g. fault recovery or fault tolerance} - H04W 8/30: Network data restoration; {Network data reliability; Network data fault tolerance} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A first network device in a high-availability cluster may configure a first wireless channel for a wireless control link. The first network device may establish, using the first wireless channel, the wireless control link with a second network device in the high-availability cluster. The first network device may configure a second wireless channel for a wireless fabric link. The first network device may establish, using the second wireless channel, the wireless fabric link with the second network device. ## Claims ### Claim 1 A method, comprising: establishing, by a first network device, a first wireless link with a second network device, wherein the first network device and the second network device are in a cluster of three or more network devices; communicating, by the first network device and via the first wireless link, control traffic to form at least one of: a unified control plane based on synchronizing a configuration and kernel state of control planes of the three or more network devices in the cluster, or a unified routing engine for the cluster based on synchronizing a configuration and kernel state of routing engines of the three or more network devices in the cluster; and establishing, by the first network device, a second wireless link with the second network device, wherein the second wireless link is used to forward network traffic. ### Claim 2 (depends on 1) The method of claim 1, further comprising: configuring, by the first network device, a cluster identifier associated with the cluster; and wherein establishing the first wireless link with the second network device comprises: broadcasting information that indicates the cluster identifier of the first network device; scanning for a particular network device that is configured with the same cluster identifier, wherein the particular network device is the second network device; and establishing, based on scanning for the particular network device that is configured with the same cluster identifier, the first wireless link with the second network device. ### Claim 3 (depends on 1) The method of claim 1, wherein the second wireless link is established based on establishing the first wireless link. ### Claim 4 (depends on 1) The method of claim 1, wherein the first wireless link is a wireless control link established over a control interface of the first network device, and wherein the second wireless link is a wireless fabric link established over a fabric interface of the first network device. ### Claim 5 (depends on 1) The method of claim 1, wherein the first wireless link is established over a first wireless channel, and the second wireless link is established over a second wireless channel. ### Claim 6 (depends on 1) The method of claim 1, further comprising: establishing a primary node and a secondary node of the cluster, wherein the primary node hosts user sessions and a primary routing engine session of the cluster, and wherein the secondary node hosts backup information for the user sessions and a routing engine session of the cluster; and performing failover from the primary node to the secondary node when the primary node experiences a fault, wherein the secondary node takes over as the primary node of the cluster based on performing the failover. ### Claim 7 (depends on 1) The method of claim 1, wherein the second wireless link is used to form at least one of: a unified data plane for the cluster, or a unified forwarding engine for the cluster. ### Claim 8 (depends on 1) The method of claim 1, further comprising: configuring the first network device as an ingress point and an egress point for the cluster; configuring the second network device as the ingress point for the cluster when a failure associated with an ingress interface of the first network device occurs; and configuring the second network device as the egress point for the cluster when a failure associated with an egress interface of the first network device occurs. ### Claim 9 A first network device, comprising: one or more memories; and one or more processors, coupled to the one or more memories, to: establish a first wireless link with a second network device, wherein the first network device and the second network device are in a cluster of three or more network devices; communicate, via the first wireless link, control traffic to form at least one of: a unified control plane based on synchronizing a configuration and kernel state of control planes of the three or more network devices in the cluster, or a unified routing engine for the cluster based on synchronizing a configuration and kernel state of routing engines of the three or more network devices in the cluster; and establish a second wireless link with the second network device, wherein the second wireless link is used to forward network traffic. ### Claim 10 (depends on 9) The first network device of claim 9, wherein the one or more processors are further to: configure a cluster identifier associated with the cluster; and wherein the one or more processors, to establish the first wireless link with the second network device, are configured to: broadcast information that indicates the cluster identifier; scan for a particular network device that is configured with the same cluster identifier, wherein the particular network device is the second network device; and establishing, based on scanning for the particular network device that is configured with the same cluster identifier, the first wireless link with the second network device. ### Claim 11 (depends on 9) The first network device of claim 9, wherein the second wireless link is established based on establishing the first wireless link. ### Claim 12 (depends on 9) The first network device of claim 9, wherein the first wireless link is a wireless control link established over a control interface of the first network device, and wherein the second wireless link is a wireless fabric link established over a fabric interface of the first network device. ### Claim 13 (depends on 9) The first network device of claim 9, wherein the one or more processors are further to: establish a primary node and a secondary node of the cluster, wherein the primary node hosts user sessions and a primary routing engine session of the cluster, and wherein the secondary node hosts backup information for the user sessions and a routing engine session of the cluster; and perform failover from the primary node to the secondary node when the primary node experiences a fault, wherein the secondary node takes over as the primary node of the cluster based on performing the failover. ### Claim 14 (depends on 9) The first network device of claim 9, wherein the second wireless link is used to form at least one of: a unified data plane for the cluster, or a unified forwarding engine for the cluster. ### Claim 15 (depends on 9) The first network device of claim 9, wherein the one or more processors are further to: configure the first network device as an ingress point and an egress point for the cluster; configure the second network device as the ingress point for the cluster when a failure associated with an ingress interface of the first network device occurs; and configure the second network device as the egress point for the cluster when a failure associated with an egress interface of the first network device occurs. ### Claim 16 A non-transitory computer-readable medium storing a set of instructions, the set of instructions comprising: one or more instructions that, when executed by one or more processors of a first network device, cause the first network device to: establish a first wireless link with a second network device, wherein the first network device and the second network device are in a cluster of three or more network devices; communicate, via the first wireless link, control traffic to form at least one of: a unified control plane based on synchronizing a configuration and kernel state of control planes of the three or more network devices in the cluster, or a unified routing engine for the cluster based on synchronizing a configuration and kernel state of routing engines of the three or more network devices in the cluster; and establish a second wireless link with the second network device, wherein the second wireless link is used to forward network traffic. ### Claim 17 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the one or more instructions, when executed by one or more processors of a first network device, further cause the first network device to: configure a cluster identifier associated with the cluster; and wherein the one or more instructions, that cause the first network device to establish the first wireless link with the second network device, cause the first network device to: broadcast information that indicates the cluster identifier; scan for a particular network device that is configured with the same cluster identifier, wherein the particular network device is the second network device; and establish, based on scanning for the particular network device that is configured with the same cluster identifier, the first wireless link with the second network device. ### Claim 18 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the first wireless link is a wireless control link established over a control interface of the first network device, and wherein the second wireless link is a wireless fabric link established over a fabric interface of the first network device. ### Claim 19 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the one or more instructions further cause the first network device to: establish a primary node and a secondary node of the cluster, wherein the primary node hosts user sessions and a primary routing engine session of the cluster, and wherein the secondary node hosts backup information for the user sessions and a routing engine session of the cluster; and perform failover from the primary node to the secondary node when the primary node experiences a fault, wherein the secondary node takes over as the primary node of the cluster based on performing the failover. ### Claim 20 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the one or more instructions further cause the first network device to: configure the first network device as an ingress point and an egress point for the cluster; configure the second network device as the ingress point for the cluster when a failure associated with an ingress interface of the first network device occurs; and configure the second network device as the egress point for the cluster when a failure associated with an egress interface of the first network device occurs.