About This Architecture

Enterprise three-tier core-distribution-access network with Palo Alto PA-5200 Series firewall, dual H3C S6520 core switches, and redundant aggregation layers protecting DMZ, management, web, and database VLANs. Traffic flows from ISP through the firewall to core switches, then distributes across aggregation switches to access layer devices serving workstations, wireless APs, and servers. This architecture implements defense-in-depth with trust boundaries between untrust (internet), DMZ, and intranet zones, ensuring high availability through dual core and distribution paths. Fork and customize this diagram on Diagrams.so to match your VLAN assignments, switch models, or add additional security zones. The design supports enterprise scalability while maintaining clear separation between management (VLAN 10), core (VLAN 100), distribution (VLAN 200), access (VLAN 300), web (VLAN 20), and database (VLAN 30) traffic.

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How do you design a scalable enterprise network with core, distribution, and access tiers using Palo Alto firewalls and VLAN segmentation?

This diagram shows a production enterprise network using a three-tier model: Palo Alto PA-5200 firewall handles perimeter security and routes traffic to dual H3C S6520 core switches for redundancy. Aggregation switches distribute traffic to access layer devices, with VLANs isolating management, web, database, and end-user traffic for security and performance.