A capstone topology with two sites, VLANs, OSPF, DHCP, NAT, and SSH. The walkthrough explains the build order, the verification commands at each stage, and the most likely places to get stuck.
Site A — two access switches with VLANs 10 (Users) and 20 (Servers), an L3 switch routing between them, an edge router doing PAT to the cloud.
Site B — single switch with VLAN 30 (Branch), an edge router with a /30 to Site A across the WAN cloud.
Both edge routers run OSPF area 0 across the WAN /30, redistribute their LANs, and act as DHCP server for their local clients.
1 more section in this chapter, plus a 1-question quiz and a hands-on lab.
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