Network Support Engineer L3

4 weeks ago


Noida, Uttar Pradesh, India Luytens Technology Solutions Pvt. Ltd. Full time
Job Profile:

As a Network Support Engineer L3, you will be responsible for ensuring end-to-end network operations across GAIL, including all data centers and site offices. Your duties will include handling teams for network monitoring and maintenance, inventory management, spares management, SLA management, and reporting monthly reviews of deployed L1 and L2 engineers. You will also be responsible for escalating complex problem resolutions to L2 and L1 support engineers.

Key Responsibilities:
  • Providing expert-level support for network-related incidents and problems, including troubleshooting and root cause analysis.
  • Performing packet capturing and debugging of unencrypted and SSL/TLS encrypted traffic from switches, routers, etc., through Wireshark tool for detailed analysis and resolution within allotted timeframes.
  • Resolving network-related issues in East-West and North-South traffic.
  • Identifying and resolving network-related problems, such as video conferencing application connectivity issues, application slowness, routing/switching issues, configuration issues, etc.
  • Implementing Policy-Based Routing (PBR) for application-wise traffic routing, IPSLA tracks, BGP, IPSLA netflow, etc.
  • Ensuring that all network devices, WAN links, and their bandwidths, downtime reports, bandwidth utilization reports, etc., are correctly configured and up-to-date in the GAIL provided NMS tool.
  • Preparing configuration configlets for all network devices, including routers, switches, etc., in GAIL NMS for bulk configuration, including patches, updates, firmware upgrades, etc., and implementing the same across the network to maintain uniformity of configuration.
  • Configuring static and dynamic routing, static and dynamic NAT, PAT, link load balancing, eRoutes, bandwidth management, QoS, DNS resolution, etc., in deployed array link load balancers.
  • Performing troubleshooting and escalating issues with OEM in case not resolved within allotted timeframes.
  • Reviewing, modifying, and creating all policies/rules configured in Forescout Network Access Control solution for detection, classification, assessment, control, and 3rd-party integrations.
  • Performing integration of all switches with 802.1x NAC for pre-admission posture assessment.
  • Configuring new DMZs/MZs zones for new applications being hosted in the network data center using Arista SDN technology, including configuring VLANs, VXLANs, eVPN, BGP, eBGP, etc.
  • Having in-depth knowledge of Cisco SD-WAN deployment, configuring Zero-Touch Provisioning between vBond, vEdge, & VManage, OMP (Overlay Management Protocol), SD-WAN security aspects, segmentation, application monitoring, multitenancy, etc.
  • Coordinating with various FMS support engineers of respective network devices at DC and DR for quarterly reviews of policies, rules, etc., to identify any loopholes, troubleshooting of any issues, assisting support teams to submit RCA for any major issues within SLA, opening TAC cases with OEM, and following up till closure RCA submissions.
  • Managing the entire IP schema, VLANs, etc., of WAN subnets, DC, and DR LAN subnets, DMZ, MZ, etc., including public IPs pools provided by Internet service providers.
  • Performing configuration, implementation, and troubleshooting of IP, MPLS, OSPF, BGP, EIGRP, IPSEC, HSRP, 802.11, 802.1x, SNMP, IPv6 routing, tunneling, HSRP, VRRP, SLA, DHCP, DNS, FTP, TFTP, NAT, and PAT, switching, VTP, STP, trunking, dot1q tunneling, etc.
  • Implementing QoS across GAIL routers and switches, using FIFO weighted fair queuing, priority queuing, custom queuing, RED CAR MQC-based traffic shaping, policing, packet marking, and classification.
  • Coordinating with various ISPs, OEMs, SIs for resolution of any network-related issues, such as Internet links issues, ILL, BGP issues, public IP pools blacklisting issues, port blocking issues at ISP end, etc.
  • Visiting GAIL Corporate Office, Delhi, in case of any major network-related issues for identification and resolution.
  • Taking backup of all devices of Noida and Jaipur DC as per GAIL backup policy, including configuration backup, log backup, etc.
  • Providing detailed plans of action for DR drills, other drills, and coordinating with other user/technical departments, service providers for successful completion of DR drills and providing RTO/RPO reports.
  • Handling resource shift plans during the contract period and providing attendance reports, etc., on a monthly basis to GAIL.
  • Having working knowledge of ISO 27001 and industry standards pertaining to information security.
  • Working closely with onsite teams on various discussions, POCs, new technology evaluations.
  • Ensuring that all audit findings for sites/offices/DC/DR are closed within given time and providing proofs (that can be shown to the auditor) to GAIL.
  • Coordinating with TAC and other escalations with OEM.
  • Performing other network-related jobs assigned by GAIL from time to time.


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