Jan 2005 – Jan 2015 · 10 yrs

• Worked in a team constituted to work in a “startup like” environment in order to create products in the data communication space.
• Being part of this team since its inception, was involved in ideation, design, reviews, implementation and testing. In addition to these, took up other responsibilities like mentoring, defending Intellectual Property (IP) audit and introducing the team to newer areas of technology.
• Below are some of the technical areas that I have designed and implemented from “ground up”:
• Extensive experience in design and implementation with parallel programming models (POSIX threads) and event driven architecture
• ACL and QoS – Design and implementation of support for packet filtering, multi-field classification, policing, hierarchical traffic shaping and re-marking.
• Support for multiple logical routers – management of multiple routing tables, local address tables, transport ports, ARP tables,
• Framework for management of routes from multiple sources (Routing protocols, interface routes, static routes) that performs optimized switch-over from active to backup routes
• Support for load-balanced ECMP routes that facilitates quicker modifications to next-hop list
• Distributed management of transport ports
• Distributed forwarding plane management – synchronization of forwarding table, transport ports and local address table on a multi-slot chassis
• Gained expertise in working with Network Processor in realizing some of these data plane functionalities
• Switch fabric management on a multi-slot chassis
• Configuration management sub-system
• Code generation and compilation environment
• Other areas – OSPFv2, RIP, IPv6, Inventory management, PPP, HTTP server, DNS resolver and Syslog

Jan 2003 – Jan 2005 · 2 yrs

• Worked as a senior engineer in a team involved in sustenance of an IP-DSLAM product
• I was involved in design and implementation of various features like - VLAN stacking (dual tagging), VLAN traffic shaping
• Gained extensive experience in programming Agere Network Processor
• Responsible for mentoring team members
• Conducted orientation for non-performers
• Worked with large multiple teams of customers - across time zones

Jan 2000 – Jan 2003 · 3 yrs

• Worked on Remote Access Servers (RAS) and IP-DSLAM of a leading OEM. A very brief highlights of some of the technical areas on which I worked during this period are as below:
• PPP, ML-PPP, RADIUS, TCP/IP protocol stack, DHCP, DNS, IPX, IP in IP and L2TP
• Memory optimization – heap and static memory usage
• Debugging issues reported from the field – like race conditions, heap memory corruption and stack corruption
• Worked with data structures like Xkernel Messages (XkMsg), Mbufs, Container Data Type (CDT)
• Gained proficiency over Vmalloc memory manager
• Worked with with various types of ports like Analog lines, T1/E1, T3, Fast Ethernet