What is a VLAN (Virtual LAN)?

it allows you to seperate trafic, say like starbucks, they have free wireless, and they have there own network, vlan lets you sererate them so people on the free one cant mess around on your network.
 
So, it separates bandwidth, then? Now, HOW would go about making a VLAN? What's the min. & max amount of hosts i could turn into a VLAN? What can i do if a LAN has routers + switches?
 
VLAN is when you split your switch up into smaller switches. To talk to people in other VLAN groups, you need to go through a router
 
VLANs are flexible, depending on your switch. How you configure it and what your switch allows you to do can do seperate things. At our schools, we have 2 VLANS. Admin, for the administrators, and Curriculum for the students and teachers. Among other things, admin machines can access the curriculum domain, but not the other way around.
 
nyhk said:
To talk to people in other VLAN groups, you need to go through a router
Click to expand...

Naturally, but would i connect the switch to the router with a patch or crossover cable?

addle_brains said:
Among other things, admin machines can access the curriculum domain, but not the other way around.
Click to expand...

How did you go about doing this?
 
You will need to set up a trunk that connects the switch to a router with a patch cable which will route all the vlan traffic. This will need to be configured on both the switch and router. A trunk will send traffic from all the vlan to and from the trunk port. This port can be any port you assign. On the router you can configure ACL’s to allow or deny traffic to and from the different vlans.
What networking equipment are you running?

http://en.wikipedia.org/wiki/Virtual_LAN
http://en.wikipedia.org/wiki/Trunking
 
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