US 12,015,555 B1
Enhanced service node network infrastructure for L2/L3 GW in cloud
Xurui Huang, Shanghai (CN); Bo Sun, Shanghai (CN); and Yuefeng Jiang, Shanghai (CN)
Assigned to Cisco Technology, Inc., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Jun. 29, 2023, as Appl. No. 18/344,381.
Claims priority of provisional application 63/494,413, filed on Apr. 5, 2023.
Int. Cl. H04L 45/745 (2022.01); H04L 45/28 (2022.01); H04L 45/76 (2022.01); H04L 49/00 (2022.01)
CPC H04L 45/745 (2013.01) [H04L 45/28 (2013.01); H04L 45/76 (2022.05); H04L 49/70 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for managing Layer 2 (L2) and Layer 3 (L3) policies comprising:
routing traffic from a first virtual machine (VM) to a first centralized gateway (CGW) through an L2 Virtual Extensible Local Area Network (VXLAN) fabric, wherein the first CGW is included within a Service Node, wherein the Service Node includes a centralized policy for both L2 functions and L3 functions, and the first CGW integrates both L2 gateways and L3 gateways;
translating a source Internet Protocol (IP) address of the traffic from a private IP address of the first VM to a floating IP address;
routing, based on the floating IP address, the traffic within the Service Node, the traffic being routed by an access Bridge-Domain (BD) from an ingress bridge-domain virtual interface (BD-VIF) to an egress BD-VIF;
translating the floating IP address to a private IP address of a destination VM; and
routing the traffic from a second CGW that integrates both L2 gateways and L3 gateways to the destination VM.