Data Center Network Engineer(Cisco CX

2 days ago

Delhi, India Tata Consultancy Services Full time

Total Exp : 8 to 12 Years Locations : Delhi / Noida / Hyderabad We are seeking a seasoned Level 3 Datacenter Network Engineer with in-depth experience in Cisco and Aruba networking technologies. The ideal candidate will lead the design, implementation, and troubleshooting of high-performance data center infrastructure with a focus on high availability, security, and scalability. You will serve as a technical SME for complex network problems, architecture decisions, and cross-platform integrations in modern hybrid environments. Key Responsibilities: Design & Architecture: - Design and deploy resilient, high-speed, low-latency network topologies across data center fabric using Cisco Nexus (3K/5K/7K/9K) and Aruba CX switches. - Architect Layer 2/Layer 3 networks with: - VXLAN/EVPN overlays - BGP EVPN, OSPF, LACP - VPC, MLAG, VSX - Design and implement fabric-based topologies and Spine-Leaf architectures.. - Configure Cisco Nexus (NX-OS) and Aruba CX (AOS-CX) - Deploy and manage L2/L3 segmentation, VRFs, VLANs, SVIs, Private VLANs, and inter-VLAN routing. - Implement routing redistribution, policy-based routing, HSPR/VRRP/GLBP, and route filtering. - Work with overlay technologies (VXLAN, LISP) and underlay IP fabric (BGP/OSPF). Automation & Monitoring: - Automate provisioning using Ansible, Python, or REST APIs for Aruba CX and Cisco Nexus (via NX-API or Cisco DNAC). - Utilize NetEdit (Aruba), Aruba Fabric Composer, and Cisco DCNM or APIC for centralized management. - Perform capacity planning, failover testing, and performance tuning of the datacenter network. - Lead root cause analysis (RCA) and troubleshooting of L2/L3 issues, link flaps, STP/RSTP, convergence issues, or fabric-related errors. - Serve as Tier 3 escalation point for critical incidents and collaborate with vendors (TAC/Support). - Create detailed network diagrams, HLDs/LLDs, and SOPs for operational teams. - Perform firmware upgrades, code validation, and manage change controls (ITIL-based processes). Required Skills & Experience: - 8+ years of experience in enterprise or data center networking. - Deep hands-on experience with: - Cisco Nexus platforms (9K, 7K, 5K, 3K) running NX-OS - Aruba CX switches (6300, 6400, 8325, 8400) with AOS-CX - Fabric technologies: VxLAN/EVPN, VSX, MLAG, VPC, LAG - Routing protocols: BGP, OSPF, static routing - L2 protocols: STP, RSTP, MST, LACP, CDP/LLDP - Expertise in: - CLI troubleshooting - Packet captures with SPAN/RSPAN - QoS design, queuing strategies, and buffer tuning - Dual-stack networking (IPv4/IPv6) Preferred Certifications: - Cisco Certified Network Professional (CCNP – Data Center or Enterprise) Soft Skills: - Excellent troubleshooting and diagnostic skills under pressure. - Strong documentation, diagramming, and presentation abilities. - Self-driven with the ability to work independently and lead projects. - Clear communication across technical and business teams. - Ability to mentor junior engineers and support staff.

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