Apr 2021 – Jun 2022 · 1 yr 2 mos · Bengaluru, Karnataka, India

• Designed the architecture to modify TCPdump code to parse DNX (Broadcom) headers. Also, I have implemented critical changes in the TCPdump code.
• Worked on designing packet forwarding path from any NPU (Network Processor) to offload processor of any NPU, in a multi NPU system.
• Provided critical improvement to enhance debugging in slowpath packet forwarding (VPP architecture)
• Worked in Slowpath Packet Processor forwarding in IOS-XR for NCS DNX family of platforms.

Aug 2013 – May 2017 · 3 yrs 9 mos · Bengaluru, Karnataka, India

• Escalations: L2 protocols (NXOS 5k/6k Data center Switches)
• Switching domain (NXOS 5k/6k Data center Switches)
• Component: Soft-Reload, VLAN MGR, and VTP MGR
• Responsible for creating, deleting, managing VLAN’s in the system
• Developed VLAN long name feature
• soft-reload was done by hijacking ISSU which internally uses kexec
• Routing domain (IOS XR - ASR9k Routers)
• Component: BGP Flowspec (Dev and Test)
• Flowspec can be used to assist in DDOS mitigation dynamically, taking benefit of BGP
• Worked on SIP-700 line card

May 2017 – Apr 2021 · 3 yrs 11 mos · Bengaluru, Karnataka, India

• Worked in layer-2 controller forwarding (Datapath – Fastpath and Slowpath)
• Worked on the overall redesign of AirGroup (control-plane) feature
• o This feature leverages zero-configuration networking to enable Bonjour services like Apple’s AirPlay, AirPrint, Google’s google cast services, etc. from mobile devices in an efficient manner
• o This has been extended for wireless & wired service enablers
• o Overall redesign of new architecture to scale 7k-8k PPS and 130K devices
• o This is a multi-threaded process that leverages OpenFlow to install flows in Datapath
• o Many new features added like packet capture, L3 Aruba discovery protocol, round trip time, packet per-minute stats, telemetry of stats, etc. are a few mentions
• Enhanced GRE tunnels to support trusted VLANs (Controlplane + Datapath)
• License manager module: Added features for FED (Controlplane) on virtual x86 based controllers
• o Offline activation of backup controller
• o Auto license activation (Unlock only on select H/W)
• o 90-Days Eval license developed and delivered in 4 days during the COVID-19 pandemic. This ensured quick enablement of remote health workers/Partners/Customers
• Worked on bug fixes at multiple levels fastpath multi CPU spraying, dynamic segmentation, GRE tunnels, glibc, Controller redundancy (Clusters) feature (Datapath only) are a few mentions
• Converted controller cluster SYNC messages to google’s protobuf messages as part of bringing controllers on Aruba Cloud Platform. Helped integrate nanopb in Aruba Datapath
• Hackathon – Implemented lockless packet tracing in a multi-CPU environment for Aruba controllers
• Hackathon – Developed a working POC for AirGroup (mDNS & SSDP) hybrid mode to drop unwanted services and VLAN based filtering
• Designed and administrated wireless+wired+cloud Aruba Lab for a team of 25 members

Jan 2013 – Jun 2013 · 5 mos · Bangaon, West Bengal, India

• POC for Regional backlighting of display, discussed in eDP 1.4 specification combined with Eye Tracker.
• An internal Automation Tool.
• Developed a windows driver using WDK