Layer 2 interface is operate in Data link layer, so this interface doesn't have IP address.
Layer 3 interfaces have IP addresses.
If you use on a multilayer switch only L2 Vlan interfaces eg. VLAN 10 and VLAN 15, between the two VLAN you can't transfer traffic, but if you use Layer 3 interfaces the multilayer device can route between the two interfaces.
Just imagine that in case of Layer 2 interface you will not reach Network layer only Data link layer...
So if the goal is pass traffic between VLANs you need use Layer 3 interfaces (SVI) and if the goal is separate the VLANs you need use Layer 2 interfaces.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.