Problem Summary In an enterprise campus network, a new switch was added to the core distribution layer. After connecting it to the existing VTP domain, several VLANs disappeared across the access layer. This triggered a major network outage affecting voice, data, and Wi-Fi. Symptoms Observed […]
![Ticket#13: VLAN Not Propagating Across Switches – VTP Revision Number Conflict Fixed [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Ticket13_VLAN-Not-Propagating-Across-Switches-–-VTP-Revision-Number-Conflict-Fixed_networkjourney.png)