Honnappa Nagarahalli

Austin, TX n (512)971-6194 n nagarahalli@yahoo.com n Visa: Green card holder

Summary of Qualification

  · Professional with 17 years of software development expertise in TCP/IP networking protocol suite, VoIP,

telecom and embedded systems.

  · 14 years of experience developing data plane software on multiple network processors, system-on-chip

architectures and multi core processors used in virtual routers, switches, wireless base stations and IP

gateways.

  · Strong hands-on expertise in C, assembly, Linux, L2 to L5 network protocols, DPDK and Open Data Plane

(ODP).

  · Proficient in analyzing customer requirements, design, coding & testing of networking software with

experience in agile methodologies.

  · Have experience working in global and cross functional teams. Experience leading global teams,

ensuring successful completion of projects end to end.

  · Collaborative, detail oriented, innovative, creative, holding two patents (US 9276776, US 8233400).

Technical Skills

Processors/SoCs Multi core Intel Xeon. Multi Core SoCs – Axxia ACP34XX, ARM A15 Axxia 55XX,

OCTEON CN38XX. IXP2400 and IXP2800.

Operating

Systems

Languages

Protocols

Linux, Solaris, OSE, VxWorks (thread programming, kernel programming)

C, Assembly Language, Proprietary languages, Shell scripts, knowledge of C++,

knowledge of Perl, Python.

Ethernet, ARP, IPv4, IPv6, ICMP, TCP, UDP, GTP-U, TWAMP, BFD, IPsec (ESP/AH), NAPT,

IPv4/IPv6 tunneling, VoIP, IGMP, PIM-SM/PIM-DM, RTP, RTCP, SIP. Knowledge of

OpenStack, SDN, NFV, Open vSwitch, Fast Data Project (Fd.io) Vector Packet

Processor, VXLAN, Geneve, LTE, WCDMA, GSM.

Frameworks

Tools

DPDK, Open Data Plane (ODP), Axxia SDK, Cavium’s SDK, IXA SDK

Makefiles, GCC, VTune, GDB, Gcov, Coverity, Valgrind, QEMU-KVM, IXIA, Adtech,

Wireshark, Git, SVN, CVS, Clearcase, FootPrints, BugZilla, Jenkins, Microsoft Office.

Professional Experience

Individual Contributor/Tech Lead, Intel, Austin, Texas

Aug 2008 – Till date

Develop Application Development Kit (ADK) consisting of highly optimized data plane protocol modules and

system software for wireless base station supporting LTE, WCDMA and GSM. Networking stack consists of

Ethernet, IPv4/IPv6, IPSec, UDP, SCTP, GTP-U, TWAMP, BFD and proprietary back plane modules. These

modules are integrated with Linux net-driver for ARP, Routing and other signaling modules running on Linux

user space. ADK is supported on multi-core/multi-threaded x86 Xeon and Atom CPUs and SoCs to support

cloud deployments. It is also supported on different generations of Axxia SoCs consisting of multi-core ARM

A15 cores and various multi-threaded hardware accelerators.

Define data plane ADK framework/architecture for x86 multicore CPUs and SoCs. Develop IPSec module.

Role & Highlights:

  · Defined and developed ADK architecture. It supports flexible stacking of the protocol modules and allows

for different packet processing models.

  · Developed and analyzed different packet processing models.

  · Developed mechanisms for data plane and control plane separation, lockless methods to update data

plane tables.

  · Developed IPsec data plane module and integrated with QAT 8955 (Coleto Creek) PCIe device.

  · Integrated ADK with Open Data Plane framework to support a customer node running in cloud.

  · Provide inputs for developing PMD APIs for hardware queue manager.

  · Developed wireless base station data plane application. Optimized the application using VTune.

  · Lead a team to setup a platform to benchmark the data plane application. This involved understanding

the target performance requirements, choosing a suitable DUT and developing the traffic generator. The

resulting performance analysis was used in designing the new SoC.

  · Developed security gateway data plane application running in virtual machine. Analyzed packet

processing latency in multi core Xeon with the availability of different amount of L3 cache.

  · Benchmark IPSec ARW algorithm performance on Xeon to assess the need for hardware acceleration.

Environment: C, Linux, Linux Kernel Programming, DPDK, ODP, VTune Amplifier, QEMU-KVM, GDB, IXIA, Multi

core Xeon-E5 dual socket board, X710 4X10GbE Ethernet PCIe card, QAT 8955 IPSec acceleration PCIe card.

Develop/maintain ADK for wireless base station market for multi-generation, multi-core Axxia SoCs.

Role & Highlights:

  · Develop IPv6, GTP-U, RTP-MUX, HSDPA framing protocol and proprietary back plane data plane modules.

  · Lead the team responsible for development of L3 to L5 and backplane data plane protocol stacks.

Responsible for analyzing/discussing requirements with the customer, developing optimized modules,

benchmarking data plane as well as call setup rate on control plane.

  · Develop multi process and multi thread support for ADK framework.

  · Develop packet handler module to transport packets between data plane and control plane.

  · Develop performance benchmarking data plane application for the base station to understand the

performance improvements required in the next generation SoC. The demo of the application and the

proposed enhancements helped win various design-wins.

Environment: C, assembly, Linux, OSE, Axxia SDK, Axxia ACP34XX, Axxia AXM55XX. Pre-silicon FPGA platforms

and simulators.

Senior Switch Engineer, NextPoint Networks, Gaithersburg, Maryland

Dec 2005 – Aug 2008

Develop/maintain the media card and related software for VoIP session border controller.

Role & Highlights:

  · Owner of media card data plane and control plane software for IXP2400 and OCTEON based PCI media

cards for development, release of packages and customer support.

  · Developed firewall data plane module. Added IPv6, voice quality monitoring and high availability features.

  · Developed control and data plane firewall configuration module for managing NAT-PT redirects.

Environment: C, assembly, C on bare metal, Linux, IXA SDK, Cavium’s SDK, IXP 2400, OCTEON 38XX.

Senior Network Software Engineer, Intel, Bangalore

Jan 2004 – Nov 2005

Develop 10Gbps application supporting IPv4/v6 forwarding, IPv4 multicast and IPv4/v6 tunneling.

Develop Ethernet and IPv4 termination modules.

Role & Highlights: Lead a team of 3 members. Developed PIM-SM/PIM-DM data plane modules. Developed

the ingress and egress pipelines, did numerous optimizations. Developed Ethernet and IPv4 termination data

plane modules.

Environment: C, assembly, Linux, IXA SDK, MontaVista Linux cross development environment, IXP 2800.

Network Software Engineer, Intel, Bangalore

Jan 2002 – Dec 2003

Develop IPv4/v6 forwarder data plane application.

Develop Net Driver to integrate IXP data plane with Linux.

Test data plane C compiler for IXP network processors.

Role & Highlights: Board bring-up with Linux. Developed NAT-PT data plane module. Developed Linux NetDriver

for IPv4 and IPv6 for packet exchange to/from Linux kernel. Testing different IXP data plane C compiler

features such as intrinsics, I/O parallelization, inline assembly and data structures.

Environment: C, assembly, Linux Kernel Programming, IXA SDK, MontaVista Linux cross development

environment, IXP2400.

Software Engineer, Hughes Software Systems, Bangalore

Nov 1999 – Dec 2001

Develop intelligent SS7 Node and interworking functionality between SS7 & ISDN.

Develop various features for Base Station Controller and Gateway Mobile Location Centre node.

Role & Highlights: Developed parser for CLI commands and database module. Executed acceptance tests

and monitored the product in live SS7 network at customer’s premises. Developed device handler for Abis

interface. Developed OS abstraction layer, inter-thread communication.

Environment: C, Solaris, Windows NT, GDB, VC++ Debugger. MOTOROLA MPC860 PCI card with VxWorks.

Academics: Bachelor of Computer Science & Engineering - 1999, Bangalore University, India.