Role: Technical L1 Network Support Engineer
Location: Chennai | 247
Notice Period: Immediate to 30 Days
CCNA certification Mandatory
Experience and Qualification Pathways
- 3-5 years of relevant technical experience in network support, enterprise networking, ISP, NOC or managed network services.•
- CCNA-level networking capability, including networking fundamentals, troubleshooting, BGP and OSPF.•
- CCNA/CCNP certification preferred; practical competency demonstrated in interview is essential.
- • Willingness to complete networking refresher, SD-WAN, RF/satellite
Candidates must achieve at least 3/5 in every Must Have category. These core entry requirements cannot be offset by Good to Have or scalability scores.
1 Core Networking Fundamentals
- OSI/TCP-IP models, encapsulation/decapsulation and end-to-end packet flow.
- IPv4/IPv6 addressing, subnetting, CIDR, route summarisation and longest-prefix match.
- Routing and switching, VLANs, access/trunk ports and inter-VLAN routing.
- ARP, ICMP, DNS, DHCP, NAT, default gateways and basic ACL concepts.
- TCP/UDP, ports, three-way handshake, MTU, MSS, fragmentation and Path MTU Discovery fundamentals.
- Interpret interface status/counters, routing tables, logs and network diagrams.
2 OSI-Layer Troubleshooting
- Structured, evidence-led fault isolation from Layer 1 through Layer 7.
- Validate physical connectivity, power, cabling, interface errors and link status.
- Investigate VLAN, MAC learning, ARP and Layer 2 forwarding issues.
- Validate addressing, gateway reachability, routing, NAT and ACL behaviour.
- Investigate TCP establishment, retransmissions, resets, DNS and application reachability.
- Differentiate LAN, customer edge, WAN/ISP, satellite access, cloud and application fault domains.
- Document tests, observations, evidence, impact, likely fault domain and next action.
3 BGP and OSPF
- BGP architecture, AS numbers, eBGP/iBGP and neighbour relationships.
- BGP state machine and troubleshooting failed or unstable peerings.
- Route advertisement/withdrawal, prefix filtering, propagation and best-path fundamentals.
- BGP attributes including local preference, AS path and MED.
- OSPF neighbour formation, adjacency states, areas, router ID, network types and cost.
- OSPF LSA and link-state database concepts at troubleshooting level.
- Investigate missing routes, route selection, reachability and convergence.
4 Wireshark / Packet Analysis
- Capture traffic and use capture/display filters to isolate conversations.
- Interpret Ethernet, ARP, IPv4/IPv6, ICMP, TCP, UDP, DNS and DHCP exchanges.
- Recognise TCP handshake, retransmissions, duplicate acknowledgements, resets and timeouts.
- Use packet evidence to investigate DNS failures, packet loss, latency and application symptoms.
- Correlate captures with logs, counters and reported symptoms.
5 TAC / Customer Handling
- Explain incident investigation and gather relevant evidence.
- Communicate technical findings clearly and professionally.
- Maintain accurate incident notes, timelines, actions and handover details.
- Understand prioritisation, escalation and service-level discipline.
- Follow runbooks and security policies in the agreed 247 operating model.
Key Responsibilities
- Provide L1 technical support for Amazon Leo connectivity and network incidents.•
- Troubleshoot customer LAN, routing, WAN/ISP and, after training, SD-WAN, satellite access and cloud connectivity.•
- Investigate BGP/OSPF reachability within defined L1 scope.• Analyse packet captures, monitoring data, logs and device outputs.•
- Recognise potential terminal, antenna, RF and satellite-link symptoms and follow diagnostic procedures.•
- Maintain incident timelines, evidence, technical notes and customer updates.•
- Escalate complex incidents with problem statement, impact, tests performed and findings.•
- Participate in training, knowledge checks, lab exercises and production-readiness assessments.
