Troubleshooting Inter-VLAN Routing: SVIs, Router-on-a-Stick, and ARP Issues
Inter-VLAN routing failures are usually caused by SVIs in down state, missing routes, DHCP misconfiguration, or ARP timeouts. Learn to diagnose and fix them systematically.
Routing
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Inter-VLAN Routing on a Layer 3 Switch: SVI-Based Routing on Catalyst 9000
Layer 3 switches route between VLANs in hardware at wire speed — no external router bottleneck. Here is how to configure SVI-based inter-VLAN routing on a Catalyst 9300.
Inter-VLAN Routing with Router-on-a-Stick on Cisco IOS XE
When you don't have a Layer 3 switch, router-on-a-stick provides inter-VLAN routing via a single physical link split into subinterfaces. Learn when this design is appropriate, how to configure subinterfaces, and why it's a bandwidth bottleneck.
Configure Single Area OSPFv2 on Cisco Routers: Complete Lab Guide
Learn to configure and verify single-area OSPFv2 on Cisco routers with complete Router ID setup, network commands, and wildcard masks. Includes hands-on Cisco CML lab with full verification outputs and troubleshooting steps.