Walkin Network Security / Data Security L3

Greetings from TCS!!

Walkin with TCS for Network Security / Data Security L3 role

Exp : 6 to 10 years

Location : Chennai

Interview Mod e: Walkin

Interview Date : 13 Jun (Sat)

Interview Venue : Tata Consultancy Services , Kumaran nagar , Sholinganallur - Chennai

Job Description:

• Administer and support enterprise LAN/WAN network infrastructure.
• Configure and manage firewalls including security policies, NAT, and access control rules.
• Implement and troubleshoot routing protocols such as BGP, OSPF, and static routing.
• Manage Layer 2 and Layer 3 switching including VLANs, trunking, STP, port-channels, and vPC.
• Support Cisco ACI fabric using APIC for configuration and monitoring.
• Configure and manage EPGs, contracts, policies, VLAN pools, and physical domains in ACI.
• Implement and support L3Out connectivity to external networks and firewalls.
• Monitor and troubleshoot network performance, latency, and availability.
• Execute network changes, upgrades, and migrations as per approved change processes.
• Provide L2/L3 support, incident resolution, RCA, and problem management.
• Participate in DR drills, audits, and security reviews.
• Coordinate with security, compute, storage, and vendor teams.

Required Skills

· Firewall administration (policy, NAT, security zones)

· Routing protocols: BGP, OSPF, static routing

· Switching: VLANs, STP, trunking, port-channels, vPC

· Cisco ACI (APIC, EPGs, contracts, L3Out)

· Datacenter networking concepts

· Network troubleshooting and performance analysis

· ITIL processes (Incident, Change, Problem)