Interesting. Yea we had a few of these due to I think it was vlan trunking protocol but I don't really remember. We had a cycle over 3 or 4 years where: 1. Con

Interesting. Yea we had a few of these due to I think it was vlan trunking protocol but I don't really remember. We had a cycle over 3 or 4 years where: 1. Configuring VLANs is hard, let's turn on the Cisco feature to sync VLANs 2. Network switch from lab or another network would be moved to production, with a higher revision index. All switches sync from the highest revision. 3. Outage happens because VLANs in lab are not same as production. 4. Investigation says vlan trunking protocol is dangerous, and should be disabled. 5. A year later, forget about the outage and repeat. I think eventually there was a feature that sort of solved this problem, but I don't remember after all this time.