What is native vlan and why?
- By default, it's vlan 1. You can change the native vlan, but never default vlan!
- Used for untagged traffic. i.e. CDP, VTP, STP, or mgmt traffic
- Used for VoIP
- Native vlan has to be the same on both switches. In another word, native vlan is per trunk per switch.
What is vlan and why?
- A vlan is a subnet; a vlan is a broadcast
- Flexibility and security