• Devised framework to enable cloud-based monitoring of embedded network switches and integrated with Cloud Network Management system.• Designed infrastructure to support the RESTCONF protocol on routers. Implemented to support the openconfig YANG models for external configuration and data collection. Utilized Redis database, Python, C++, and C on Linux based embedded system.• Created generic code templates and defined relationships for Model-Driven Development (MDD).• Developed control plane code, defined project milestones, and acted as lead for control logic for Port Extender via a Controlling Bridge (802.1BR).

Engineered innovative technologies for Layer 2 and 3 networks:• Designed Fabric Attach control plane. FA connects cameras, wireless APs, IoT, and switches to an SPB fabric. - Implemented MLAG/Split Multi-Link Trunking (SMLT) messages, failure logic and data synchronization - Coded automatic I-SID creation, SDK callbacks and LLDP UI• Tested Health Care Solution in which SDN controller programs Open Networking Adapters (ONA) to signal Fabric Attach; debugged using KVM logs, OVS stats, NETCONF and verified traffic• Created control plane for IS-IS Accept policies which allow inter Virtual Routing and Forwarding (VRF) leaking as well as filtering by nickname, I-SID and route policies• Implemented Private VLAN and developed ETREE (Private VLAN over SPB) control plane logic and messaging to Broadcom datapath• Spearheaded IP multicast over SPBM (802.1aq) - Added logic for transmitting and receiving multicast SPB TLVs via Intermediate System to Intermediate System (IS-IS) - Invented mechanism to trace SPB multicast flows via CFM (802.1ag) - Resolved scaling issues using queue logic to handle bursts of Link State Packets (LSPs)• Invented Layer 3 interface to CFM for IPv4 and IPv6, including addresses learned as IP shortcuts and Equal-Cost Multi-Path Routing for various VRFs and implemented by expanding state machines, creating algorithm to map VRF and ECMP to CFM packet, and modifying control plane• Devised Nodal CFM to debug inside SPB cloud and CFM CMAC to debug across the cloud, coded control plane and packet formation of both VLAN and MiM encapsulated packets and invented I-SID tracing• Developed automated tests in Java to test Layer 3 SPB with OSPF, BGP and RIPEmbedded Platform• Developed Linux routines as part of boot sequence and hardware (HW) conversion• Parsed optical transceiver information as per SFF-8472 specification for Diagnostic Monitoring Interface for Optical Transceivers to allow best effort link operation for any transceivers

• Technically led team for Connectivity Fault Management (802.1ag) and Performance Monitoring (Y.1731) enhancements for North American Tier One. Concurrently designed and implemented Ethernet First Mile (802.3ah)• Designed and coded Provider Backbone Bridge Traffic Engineering (802.1Qay) scaling feature for European Tier One. Implemented while acting as team lead. • Led team and developed Multi-Link Trunking (MLT/LAG) 802.1ag• Designed and developed CFM (802.1ag) on Metro Ethernet Routing Switch. Devised MIB/CLI, coded state machines, ensured packet encapsulation. Integrated CFM code with existing PBT trunk switching• Executed Feature Test for 8 port DS3/ES3 IOC card for Software Quality Assurance (SQA)• Designed and implemented Quality of Service (QOS) control plane code for Hierarchical Scheduling. This feature enabled intelligent bandwidth policing and scheduling for subscribers• Worked with Product Line Managers to refine requirements and determine release content• Created and executed test plan to verify SNMP, SSH, memory, RPC, telnet and FTP code ported from PPC processor to MIPS processor. Corrected alignment issues, exceptions, and crashes found • Invented proprietary event definition language and used Perl scripts to generate C routines to send SNMP traps

• Developed mechanism to build System V dynamically loadable shared libraries for object oriented executable and to load them as required on live router. Used PCCTS to parse class meta data, wrote a Perl script to generate Makefiles for shared libraries, and implemented interface to dynamic linking facilities (dlopen)• Created commands to configure Service Edge Router using database manipulation, RPC calls, software semaphores, and parser modifications in VxWorks environment. Extended configuration and accounting to collect various statistics and transfer data to a server or a file• Added EMANATE SNMP v3 framework, MIB objects using SMI syntax, and used k routines• Modified proprietary agent code (GAME) to support SNMP v2: added 64 bit counter support, expanded error handling, and implemented multi-varbind get next• Designed parser for command line interface, Bay Command Console (BCC)

• Created mechanism to allow Electronic Data Interchange (EDI) for Health Care Registration for Harvard Pilgrim Health Care. Performed trials with lead customers for annual enrollment

• Defined device drivers for proprietary circuit cards operating under VxWorks

• Developed C libraries for ModSAF, a virtual simulation model• Designed mechanism to pass data between analytical constructive and virtual simulation models

• Developed real time embedded software for satellite simulator to mimic uplink probe responses to a ground terminal as defined by MIL standards• Designed GUI and message handler for satellite simulator using C, C bindings, and Ada • Created download code that initialized dual port RAM, wrote to DSP using semaphores and dual sided buffers, and extracted/formatted data from a memory image file• Studied signal manipulation as required for secure satellite communications, including Fast Fourier Transforms (FFT) and various encryption techniques