# US 2018/0026933 A1 · Service aware label address resolution protocol switched path instantiation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0026933 A1 - Document ID: US20180026933A1 - Status: Published application - Kind: A1 - Application number: 15/217,799 - Filed: 2016-07-22 - Published: 2018-01-25 - Earliest claimed: 2016-07-22 - Assignees: Cisco Technology, Inc. - Applicants: Cisco Technology, Inc. - Inventors: Rajiv Asati; Nagendra Kumar Nainar - Web page: https://patentgrep.com/patent/US20180026933A1 ## CPC - H04L 61/103: across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP] - H04L 45/12: Shortest path evaluation - H04L 45/50: using label swapping, e.g. multi-protocol label switch [MPLS] - H04L 45/507: {Label distribution} - H04L 45/586: of virtual routers - H04L 45/02: Topology update or discovery - H04L 47/724: at intermediate nodes, e.g. resource reservation protocol [RSVP] - H04L 2101/622: Layer-2 addresses, e.g. medium access control [MAC] addresses - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Systems, methods, and computer-readable media for service aware label address resolution or neighbor discovery protocol switched path instantiation for large-scale cloud networks. The system including a gateway server configured to receive from a first client, a request to communicate with a second client, the request including a destination and one or more attributes. The gateway server configured to determine a label based on the destination and the one or more attributes, the label corresponding to a pre-existing tunnel, and transmit a reply to the first client, including the destination, the one or more attributes, and the label. ## Claims ### Claim 1 A computer-implemented method comprising: receiving, at a gateway server from a first client, a request to communicate with a second client, the request including a destination and one or more attributes; determining a label based on the destination and the one or more attributes, the label corresponding to a pre-existing tunnel; and transmitting a reply, to the first client, including the destination, the one or more attributes, and the label. ### Claim 2 (depends on 1) The method of claim 1, wherein the request is received from a virtual forwarder executed by the first client executing a plurality of virtual machines. ### Claim 3 (depends on 1) The method of claim 1, wherein the destination is the second client executing a second plurality of virtual machines and a second virtual forwarder. ### Claim 4 (depends on 1) The method of claim 1, wherein the determining further comprising: a look-up table, comprising a plurality of labels, based on the destination and the one or more attributes. ### Claim 5 (depends on 1) The method of claim 1, further comprising: determining the label corresponding to the pre-existing tunnel does not exist; transmitting, to a path computation element server, the destination and the one or more attributes; receiving, from the path computation element server, a new label including a tunnel to the second client; storing, in a look-up table, the destination, the one or more attributes, and the new label; and transmitting, to the first client, a reply including the destination, the one or more attributes, and the new label. ### Claim 6 (depends on 5) The method of claim 5, wherein the new label is identified by a path calculation algorithm based on the destination and the one or more attributes. ### Claim 7 (depends on 1) The method of claim 1, wherein the attributes are selected from two of the following: bandwidth, differentiated services coded point, latency, L2/L3/L4 header values, number of hops, or packet loss. ### Claim 8 A provider edge device comprising: a processor; and a computer-readable storage medium having stored therein instructions which, when executed by the processor, cause the processor to: receive from a first client, a request to communicate with a second client, the request including a destination and one or more attributes; determine a label based on the destination and the one or more attributes, the label corresponding to a pre-existing tunnel; and transmit a reply to the first client, including the destination, the one or more attributes, and the label. ### Claim 9 (depends on 8) The provider edge device of claim 8, wherein the request is received from a virtual forwarder executed by the first client executing a plurality of virtual machines. ### Claim 10 (depends on 8) The provider edge device of claim 8, wherein the destination is the second client executing a second plurality of virtual machines and a second virtual forwarder. ### Claim 11 (depends on 8) The provider edge device of claim 8, wherein the determination further causing the processor to: search a look-up table, comprising a plurality of labels, based on the destination and the one or more attributes. ### Claim 12 (depends on 8) The provider edge device of claim 8, comprising further instructions which, when executed by the processor, cause the processor to: determine the label corresponding to the pre-existing tunnel does not exist; transmit, to a path computation element server, the destination and the one or more attributes; receive, from the path computation element server, a new label including a tunnel to the second client; store, in a look-up table, the destination, the one or more attributes, and the new label; and transmit, to the first client, a reply including the destination, the one or more attributes, and the new label. ### Claim 13 (depends on 12) The provider edge device of claim 12, wherein the new label is identified by a path calculation algorithm based on the destination and the one or more attributes. ### Claim 14 (depends on 8) The provider edge device of claim 8, wherein the attributes are selected from two of the following: bandwidth, differentiated services coded point, latency, L2/L3/L4 header values, number of hops, or packet loss. ### Claim 15 A non-transitory computer-readable storage medium having stored therein instructions which, when executed by a processor, cause the processor to: receive from a first client, a request to communicate with a second client, the request including a destination and one or more attributes; determine a label based on the destination and the one or more attributes, the label corresponding to a pre-existing tunnel; and transmit a reply to the first client, including the destination, the one or more attributes, and the label. ### Claim 16 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein the request is received from a virtual forwarder executed by the first client executing a plurality of virtual machines. ### Claim 17 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein the determination further causing the processor to: search a look-up table, comprising a plurality of labels, based on the destination and the one or more attributes. ### Claim 18 (depends on 15) The non-transitory computer-readable storage medium of claim 15, comprising further instructions which, when executed by the processor, cause the processor to: determine the label corresponding to the pre-existing tunnel does not exist; transmit, to a path computation element server, the destination and the one or more attributes; receive, from the path computation element server, a new label including a tunnel to the second client; store, in a look-up table, the destination, the one or more attributes, and the new label; and transmit, to the first client, a reply including the destination, the one or more attributes, and the new label. ### Claim 19 (depends on 18) The non-transitory computer-readable storage medium of claim 18, wherein the new label is identified by a path calculation algorithm based on the destination and the one or more attributes. ### Claim 20 (depends on 15) The non-transitory computer-readable storage medium of claim 15, wherein the attributes are selected from two of the following: bandwidth, differentiated services coded point, latency, L2/L3/L4 header values, number of hops, or packet loss.