Posted on 2011-03-11
I am hoping some of you can help explain VLANs to me, and provide me with a solution to my problem.
Here is an overview of the network setup:
We span 3 floors and have switches in 3 central locations. The main switches are all managed switches of the Dell variety. Some 34xx, some 54xx. We have unmanaged switches are random locations throughout the office where we needed them. These are of varying variety, mostly Linksys or Netgear.
Recently we picked up a Dell 2824 switch to go in a server rack. We want to setup a VLAN to isolate some server traffic from the rest of the network, but still allow the VLANS to talk to each other.
Right now there are no VLANS, everything is on VLAN1 (the default created one).
Here is what I setup on the 2824:
VLAN2: Ports 11-20. Untagged.
VLAN1 (default): all other ports
Port 23 is set to Tagged for VLAN2, but is still in VLAN1.
Connecting the switch to the rest of the infrastructure (on port 23), VLAN1 can talk to the network and get internet access, but VLAN2 is still completely isolated (no internet, cannot ping anything outside VLAN2).
I assume this is because no trunk port has been designated. So in this case, since port23 is connected to the rest of the infrastructure, I would make port23 a trunk port, correct?
I read in one of my many online searches a comment that mentioned all managed switches in the network need to know about every VLAN. If this is true, how does one go about doing this? Do I have to connect to every switch and create a "VLAN2", even if no ports are assigned to it? I'm a little confused on this aspect.
If someone can help me try to understand a little better about how VLANs communicate through the network, and in my specific case what I would need to do to accomplish what I set out to do, I would be much appreciative!