Open to senior network and cloud roles
Sagar Bairagi
Cloud & Data Center Network Engineer · CCIE #57252
I design, secure and troubleshoot data center and hybrid cloud networks. Fifteen years of hands-on work – from L1 support to leading Cisco ACI fabrics for Vodafone’s European data centers and connecting them to AWS, Azure and GCP.
LinkedIn sagargbairagi@gmail.com Pune, India
15+
years designing and running production networks
CCIE
#57252 Routing & Switching (lab)
4
Vodafone core data centers on Cisco ACI
5
countries in a global WAN migration
What I do
Networks that are designed well, secured by default and quick to fix
Three things I am known for in every team I have worked with.
Network design
Data center fabrics, hybrid cloud and enterprise WANs designed for scale, segmentation and failure – documented as HLD and LLD that operations teams can actually use.
- Cisco ACI Multi-Pod
- VXLAN EVPN
- Hybrid cloud
- IPv4/IPv6 addressing
- HLD / LLD
Network security
Segmentation by design: tenants, VRFs and contracts in the fabric, micro-segmentation with NSX-T, and firewalls and VPNs at every trust boundary.
- Zero-trust segmentation
- FortiGate
- Cisco ASA / Firepower
- Juniper SRX
- IPsec & SSL VPN
- Cisco ISE
Troubleshooting
Calm, methodical P1 incident work across routing, switching, overlays and security appliances – then the root-cause analysis and the fix that stops it happening again.
- BGP / OSPF
- Packet captures
- P1/P2 incidents
- Root-cause analysis
- Runbooks
Selected work
Recent projects
Case studies with the problem, what I did and the outcome.
Hybrid connectivity between AWS and on-premises Cisco ACI
Read the case study: Hybrid connectivity between AWS and on-premises Cisco ACIConnecting AWS workloads to on-premises data centers running Cisco ACI with Site-to-Site VPN and Direct Connect, ALB/NLB application delivery and Terraform-built VPCs.
ACI configuration as code with Ansible, Git and Jenkins
Read the case study: ACI configuration as code with Ansible, Git and JenkinsReplacing hand-built ACI tenant changes with Ansible playbooks, YAML/JSON templates and a Jenkins pipeline with automatic pre-checks and post-checks across several fabrics.
Cisco ACI fabrics for four Vodafone core data centers
Read the case study: Cisco ACI fabrics for four Vodafone core data centersDesign, deployment and operation of Cisco ACI Multi-Pod fabrics for four of Vodafone’s core data centers in the UK and Europe, integrated with NSX-T, HPE networking and AWS, Azure and GCP.
Experience
From L1 support to data center lead
Since 2011 I have worked my way through every layer of network operations and design – which is why I can talk to both the engineer on call and the architect in the design review.
Senior Specialist Cloud Network Engineer
Design and run the hybrid network between AWS and on-premises data centers built on Cisco ACI.
Senior Network Manager – Data Center
Ran four enterprise-scale Vodafone data centers: Cisco ACI Multi-Pod, Nexus 9K/7K, VMware NSX-T, Fortinet and Juniper firewalls, F5 load balancers.
Data Center Manager
Led design, deployment and operation of Cisco ACI fabrics for four large Vodafone core data centers in the UK and Europe.
Deputy Manager – Network
Rolled out Cisco DNA Center with SD-Access, integrated with Cisco ISE and wireless controllers for identity-based access, device profiling and secure mobility.
Certifications
Certified where it matters
CCIE #57252 – Routing & Switching
Cisco Certified Internetwork Expert (lab). Also passed the CCIE Data Center written exam.
Cisco Certified Specialist – Data Center
Data Center Core, Design and Operations.
VMware NSX-T
Network virtualization and micro-segmentation.
Microsoft Azure AZ-700
Designing and Implementing Azure Networking Solutions. Plus AZ-900 Fundamentals.
Cisco SVPN
Implementing Secure Solutions with Virtual Private Networks.
Juniper JNCIA
Juniper Networks Certified Associate – Junos.
Blog
Latest writing on networking and AI
The first articles – on BGP and hybrid cloud connectivity, data center fabrics, automation and practical AI for network teams – are being written. Get in touch if there is a topic you would like covered.
Open to new opportunities
Looking for a senior network or cloud engineer?
I design resilient data center and hybrid cloud networks, secure them and keep them running. Recruiters and hiring managers are welcome to reach out.