- It can automatically route between locally created vlans because it considers them as connected interfaces (given that the SVIs are created).
- on a device, there are 3 types of traffic: control, management, end user.
- Control traffic such as CDP, DTP, PAgP goes through vlan1 between Cisco switches, even if you clear it from trunks.
- By default, native vlan traffic is untagged. But there's a Cisco command that tells the switch to tag all vlans.
- by default, native vlan = vlan1. If we set the native vlan to vlan100, then vlan100 frames will be untagged on trunks, and vlan1 frames will be tagged.
- SMI: Standard Multilayer Image
- EMI: Enhanced Multilayer Image
- if switch is acting L2, then we should set a Default Gateway on it to make the management vlan reachable remote ; if it is acting L3, it will have routes instead.
- switch and Management vlan
- the management IP address must be reachable from remote
- best practice: use a same subnet to manage all network devices
- on L2 SW: only one SVI is up at a time
