L3 Network Engineer/Team Leader
Responsible for design, deployment, and troubleshooting of Cisco SD-Access and ISE, requiring strong analytical skills and ability to handle escalations.
Skills
About This Role
Overview
The L3 Engineer will be responsible for design, deployment, troubleshooting, and optimization of enterprise network environments focusing on Cisco SD-Access (SDA) and Cisco Identity Services Engine (ISE).
The role requires deep technical ownership, architecture-level thinking, and handling complex escalations across campus networks, NAC, and segmentation.
• Cisco SD-Access (SDA)
- Design and implement fabric using Cisco DNA Center
- Deploy and manage: Control Plane Nodes, Border Nodes, Edge Nodes Fabric domains and multi-site SDA
- Strong expertise in:
- Underlay (OSPF/IS-IS, ECMP design)
- Overlay (VXLAN, LISP control-plane behavior)
- Implement segmentation: Virtual Networks (VN), Scalable Group Tags (SGT)
- Perform: Fabric provisioning, SWIM upgrades, automation workflows
- Troubleshoot: Fabric issues (LISP registration, VXLAN encapsulation, endpoint mobility)
• Cisco ISE (Identity Services Engine)
- Deploy and manage Cisco Identity Services Engine (ISE) in distributed architecture
- Configure: 802.1X, MAB, Guest, BYOD onboarding
• Policy Sets, Authorization Profiles, Profiling
- Advanced experience in: EAP-TLS, PEAP authentication flows
- PKI & certificate lifecycle management
- Implement: TrustSec (SGT, SGACL), posture compliance
- Integrate with: Active Directory / LDAP / MDM solutions
- Troubleshoot: RADIUS/TACACS+, endpoint authentication & authorization failures
• Cisco TrustSec & Segmentation
- Design and implement: Micro-segmentation using SGT & SGACL
- Experience in: SGT propagation across SDA & non-SDA networks
- Integration with firewalls (e.g., Fortinet, Palo Alto)
• Network Troubleshooting (L3 Escalation Handling)
- Handle complex P1/P2 incidents across: SDA fabric, NAC, LAN/WLAN
- Perform: Deep packet analysis (RADIUS, DHCP, DNS, EAP)
- Tools: Wireshark, CLI debugs
- Conduct: Root Cause Analysis (RCA) with preventive measures
• Wireless & Mobility Integration
- Integrate SDA with Cisco WLC (9800 series preferred)
- Troubleshoot: Roaming issues, policy enforcement failures
- Implement: Identity-based wireless access via ISE
• Security & Zero Trust Architecture
- Implement Zero Trust using SDA + ISE
- Design: Identity-based access control policies
- Handle: Threat containment and dynamic access enforcement
• WAN & Data Center Integration
- Integration of SDA with: MPLS WAN, Internet edge
- Exposure to: SD-WAN (Cisco Viptela)
- Fusion router & border node design
- Basic understanding of: VXLAN EVPN (Data Center fabrics)
- Operational Excellence
- Handle: Major incidents and escalations
- Work within: ITIL processes (Incident, Change, Problem Management)
- Mentor: L1/L2 engineers and act as escalation point
Soft Skills
- Strong analytical and troubleshooting skills
- Ability to handle high-pressure L3 escalations
- Clear communication with stakeholders and clients
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