Vishal Sahare

Packet Data Gateway Network

• 64-bit migration from 32-bit of PGW node (UPF, UP)
• App-Infrastructure development and design in gRPC space in HERMES UPF node
• Design and development of Name-Server component in HERMES.
• Product development and design cnUPF (Sx/N4 interface PFCP).
• Control and Data path support in iCUPS and CUPS solution.
• Maintenance of UPF, CUPS-UP in mobility space.
• Development of CUSP solution to support accelerated flows with TCP Proxy to improve round trip time.
• Support of CUTO (Cisco Ultra Traffic Optimization) traffic.
• Mentor junior developers through regular 1-on-1 meetings, providing guidance on best practices, coding standards, grooming them to enable them as good software engineer.
• Coordinated with cross-department teams like platform team, control plane team, QA, DevOps, and Support to ensure seamless end-to-end software delivery process.
• Enhanced system performance with thorough code reviews, debugging, and optimization techniques.

Cisco-ISG(Intelligent Service Gateway)

• Development/maintenance BNG (Broadband Network Gateway) Control Plane and Data Plane.
• Control congestion at DSLAM by Standardize L2TP protocol as per RFC 5515, to transport dynamically change DSL line information from LAC to LNS (L2TP, xconnect, SSM)
• Developed scalable and maintainable code, ensuring long-term stability of the software by ISG feature template.
• Tool “smart pre-commit sanity” framework, detects and execute the test suites with respect to changed files.
• Scale, Performance and memory usage improvement in terms of number of IP sessions from 48k to 128k and ensuring long-term stability of ISG Product.
• Accounting accuracy for templated IP sessions.
• PoC for queueing support on VirtualPPP interfaces.
• L2TPv3 for L2VPN scenario for L2 traffic. (L2TP, xconnect, pseudowire).
• L2TPv2 for LAC-LNS deployment. (L2TP, ANCP, xconnect).
• MLPPP for LAC-LNS deployment on ASR1K and support on ISR4K series (PPP, MLPPP infra, Shim layer, MCP, CPP).

Radio Aware Routing (RAR)

• Support in aggregate and bypass mode on ASR1K, CSR1K, ISR4K series. (PPP, adjacencies infra, VMI, VAI, OSPFv3)
• LDP protocol (MPLS-LDP, L2VPN, L3VPN) and RFC 8104 requirement compliance.
• Collaborated with cross-functional teams to deliver high-quality software products on schedule.
• Build team for takeover on components from other team and provide development and sustenance.

Message Routing Hub (MRH)

• Design and development of Message Routing Hub (MRH) acts different diameter agents like Relay, Proxy, Redirect agents, route the diameter message based on the policy configured.

3GPP AAA Server

• Design and development of 3GPP AAA Server provide security solutions which communicates with PDN-GW to authenticate subscribers for trusted/untrusted non-3GPP access and HSS.

NSN-HSS(LTE)

• Development /Maintenance of NSN-HSS(LTE) provide solutions provides safe and reliable authentication, authorization and accounting for the 3GPP and non 3GPP subscribers to access the EPC network.
• Development /Maintenance of NSN-HSS(LTE) on NSN diameter stack- Cx, Sh, SWx, Rx, S6a, S6b interfaces for control signals on EPC network.
• Collaborated with cross-functional teams to develop high-quality software products within tight deadlines.

Base Station Subsystem Manager (BSSM)

• Support and maintain Nortel Network's BSSM product is the primary network management entity for CDMA Cellular Land Network.
• Development in improvement of bandwidth for Nortel Network product BSSM having IP Backhaul feature.
• Several Base Station Communication Network (BCN) frames communicates on BCN addresses which IP, UDP & ETH overheads which is designed by multiplexing the multiple BCN frames.