Here's the IEEE 802.1 defintion of VLAN. This is basically your layer 2 VLAN.
Provides for the logical grouping of stations (MAC Service Access Points - MSAPs) and/or switch ports, allowing communications as if all stations/ports are on the same physical LAN segment. This includes stations/ports that are physically located on different LANs or segments within the physical boundary of an 802.1D Bridged LAN. A single Bridged LAN may include multiple VLAN segments.
With that said, as the previous poster mentioned, for a host on a VLAN to communicate with a host on another VLAN you need a layer 3 device (router). Often, this is done by a layer 3 switch (like 3550, 6500 etc.). On a layer 3 device you have to create a logical interface, vlan interface on a switch or sub-interface if you are doing router-on-a-stick, to route traffic between VLANs. This is basically your layer 3 VLAN (interface) if you like to call it that way.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...