Network L3 Support_P_3rd Nov

Key Responsibilities :

L3 Network Support & Troubleshooting :

Provide advanced (Level 3) support for escalated incidents related to Cisco Firewalls, Meraki Switches, and Aruba Wireless networks.

Perform deep-dive troubleshooting for routing, switching, wireless, and security-related issues.

Analyze root causes and implement permanent fixes for recurring problems.

Configuration & Maintenance :

Configure, manage, and maintain

Cisco ASA / Firepower / FTD

firewalls including VPNs, ACLs, and NAT policies.

Manage

Meraki MS series switches —VLANs, trunking, L3 routing, link aggregation, and port security.

Deploy and support

Aruba Wireless

infrastructure including controllers, access points, and wireless SSIDs.

Monitoring & Performance Optimization :

Monitor network health using tools like

Meraki Dashboard ,

Aruba Central , and

SolarWinds .

Identify and resolve performance bottlenecks and connectivity issues.

Optimize configurations to improve reliability, redundancy, and security.

Security & Compliance :

Manage network security configurations and policies.

Conduct periodic audits and ensure compliance with organizational security standards.

Collaboration & Documentation :

Collaborate with L2 teams for escalations and provide mentoring or training as needed.

Maintain updated documentation on configurations, network diagrams, and standard operating procedures.

Technical Skills Required :

Firewalls :

Cisco ASA / Firepower / FTD (Policy Management, VPN, NAT, Access Control)

Switching :

Cisco Meraki MS Series (L2 / L3 switching, VLANs, Spanning Tree, EtherChannel)

Wireless :

Aruba Access Points & Controllers (SSID management, radio tuning, roaming, authentication)

Routing Protocols : OSPF, BGP, EIGRP

VPN Technologies :

IPsec, SSL VPN, Remote Access VPNs

Monitoring Tools :

Cisco Meraki Dashboard, Aruba Central, SolarWinds, PRTG

Other :

DNS, DHCP, SNMP, NTP, QoS, Network Segmentation, HA / Redundancy Concepts

Qualifications :

Bachelor’s degree in Computer Science, Information Technology, or related field.

7–10 years of hands-on experience in enterprise network support (L3 level).

Certifications Preferred :

Cisco Certified Network Professional ( CCNP Security / CCNP Enterprise )

Meraki Certified (CMNA / CMNO)

Aruba Certified Mobility Professional ( ACMP ) or equivalent

Strong problem-solving and analytical skills.

Excellent communication and documentation skills.