Feb 2013 – May 2018 · 5 yrs 3 mos · Bengaluru Area, India

• Dataplane software development for packet forwarding ASIC with multi-threaded architecture - SNP4000 - on Ericsson's range of routers. The software enabled the routers to be deployed in various segments of networking such as BRAS, MPBN, Packet-Gateways for Mobile backhaul and 5G deployments.
• + QoS PWFQ for L2TP Network Server (LNS) on SSR
• The design and implementation challenges was around the QoS hierarchy for pseudo floating interfaces, spread across multiple linecards. The queuing was distributed among port hierarchy and fabric hierarchy to achieve the desired subscriber level PWFQ. Optimizations to help achieve bringup and performanance.
• + Host path protection infrastructure,
• DDoS protection is one of the primary concerns in any network deployment.
• Hostpath protection involved an intelligent flow-aware throttling to give fairness among all
• the flows of a punt application as well as a coarse linecard-level ratelimiting to give fairness
• among multiple punt applications. Fast-throttling DDoS protection for inline reassembly.
• + L2TP Access Concentrator (LAC)
• Designed and implemented the forwarding path for LAC.
• Performance improvements and optimizations, concerning bring-up rate and dataplane throughput with the high scale of subscribers.
• + tunnel infrastructure design and implementation
• + QoS propagation for MPLS, Subscribers, Tunnels.
• Propagate the class of service information from the incoming packets to the outgoing packets, and internal node qos treatment based on rules, translation tables and precedence priority.
• + Queueing for L2TP Network Server (LNS) on R8801.
• Design the queuing towards fabric and then porting PWFQ for LNS.
• + AGF
• Current working on access gateway function (AGF) for coexisting wired and wireless UEs in 5G deployments.
• Awarded innovation award for multiple engineering and productivity improvement ideas.
• Focus with Persistence on resolving tough engineering problems and customer escalations.
• Lead mentoring of new joiners.

Jun 2008 – Feb 2013 · 4 yrs 8 mos · Bengaluru Area, India

• Dataplane development for M/Mx-Series routers.
• Work focus was on multiservice edge routers.
• + Worked on MPLS VPNs, VPLS.
• Co-owned Layer2 VPNs, Layer3 VPNs, VPLS modules of M/Mx-Series routers
• + Designed and implemented PIM snooping over VPLS.
• Work encompassed extracting and re-ordering packet fields in microcode and crafting the lookup path in ASIC.
• + Microcode optimization on M series routers.
• Due to static mapping of saving microcode instructions, few combination of interface cards could not be used together.
• To solve this, this project involved dynamic re-organisation of ucode based on the configuration CLI configuration knob.
• + Maintenance of multiple forwarding applications on pizza 1RU M-series edge boxes.
• + Handled various interop scenarios with multiple flavors of NPUs on M320, Mx routers.

Jan 2008 – May 2008 · 4 mos

• Developed a UNIX style shell for the Proprietory TINI OS on DS series microcontroller. Implemented telnet protocol on the same.