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Questions tagged [vlan]

Group of hosts with a common set of requirements connected as if on the same broadcast domain despite physical location

VLAN, short for virtual local area network or virtual LAN, is where a group of hosts sharing the same set of requirements are connected to each other as if they were on the same broadcast domain regardless of their actual physical location.

See also

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Does using VLANs in your network infrastructure cause an appreciable decrease in performance?

This is something I've never considered before and wanted the opinions of the experts. We use VLANs day in and day out for various network tasks. My modus operandi is that in general, if something supports VLANs, that port is getting trunked…
Peter Grace
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Stop DHCP client from receiving old IP address on new VLAN

I have one DHCP server running Windows Server 2008 R2. It is configured with one Superscope which contains 5 member scopes. One scope for each one of my subnets. Here is the problem, if I am on VLAN 12 I get a VLAN 12 IP but if I disconnect my…
Ruisu
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Radius feedback from AP to WiFi client

We have the following setup at our company: a gateway PC with CentOS (gw), running Radius and some traffic filtering programs. All of our employees connect wirelessly, and we have a WPA2 Enterprise encryption in place. The users are in a MySQL…
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Campus VLAN Segmentation - By OS?

We've been thinking through re-arranging our network and VLAN configuration. Here's the situation. We already have our servers, VoIP phones, and printers on their own VLANs, but our problem lies with end user devices. There are just too many to lump…
Moduspwnens
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Design Critique Needed ( VLAN & ESXi )

So this is my new "project" which consists of tearing down our legacy network and re-doing it correctly. As of now it is a mess. Production is a hogpoge of legacy servers that should have been put to pasture two years ago. Within this time period I…
BrandonB
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Mixing SAN iSCSI Traffic with core network traffic, Am I asking for trouble?

I am configuring a new network and had a couple questions I am finding hard to find good answers about best practices on using VLANs to separate Core network traffic and iSCSI traffic. The switches for the core network are a Cisco 24 port 3560X…
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Do I need routing protocols on a small network?

I have a small network with 10 VLANs, mostly routed via our core layer 3 switch. RIP is enabled on the core switch, but I'm in the process of adding a second router for a couple of VLANs as our core switch doesn't support policy based routing. In a…
Bryan
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Procurve 2810 command line - reassigning ports to a different VLAN

A very basic question, but my googling has failed to find an answer... At present the VLAN config looks like this: vlan 1 name "DEFAULT_VLAN" untagged 1 ip address 10.200.1.134 255.255.255.0 tagged 2,Trk1 no untagged 3-20,23-24 …
ChrisNZ
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How to Configure VM's with static IP on Hyper-v host windows server 2008 R2?

I have Hyper-V role installed on Windows server 2008 R2 installed on a machine with 32GB RAM and IBM System X3400 M3 Server. I created the Guest VM using the VHD that is already installed with Windows server 2003 SP2 using the Hyper-V manager…
mainu raj kehte hai
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Can a non-VLAN-aware switch pass 802.1q tagged packets?

Let's say I have a incoming connection which is fixed 1Gb/s with tagged packets. And lets say that I need to connect that connection to a device which is a 10/100 device, which deals with the tagged packets. Can I use a dumb (ie: non-VLAN-aware)…
David Mackintosh
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Cisco IOS: Segregating VLANS

I am trying to segregate the traffic on the VLANs, as one is our visitor VLAN (VLAN 3 is the guest lan). It is a Cisco 881W router. Here is my VLAN configuration: interface Vlan2 ip address 10.10.100.1 255.255.255.0 no ip redirects no ip…
Dan McClain
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Set 802.1Q tagged port on VLAN1 on Dell PowerConnect switch

I'm having big troubles when adding this Dell switch to my network. Here we use several VLANs to segment traffic. All switches (3com and DLink mostly) have configured the same VLANs, most ports are 'untagged' and belong to a single VLAN, except for…
Javier
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Adding a new vlan to a pair of Cisco 4948E that are standby - any pitfalls?

at a branch office, we have a pair of 4948E as the network core. I need to add a new VLAN and haven't done so on these devices before. Here's an existing config on one of the pair: interface Vlan20 description DC-Guest ip address 10.2.80.3…
mfinni
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Inject Delay between Virtual Machines in a VLAN

We'd like to simulate the impact of locality using VMs within a on a public cloud (say AWS EC2). To do this, we would like to inject delays in packets such that we can simulate a particular network topology. Assume that there are three VMs: A, B,…
Jedi
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how to make Windows server 2012R2 NIC connect to trunk,but with a VLAN ID

Windows Server 2012R2 ,with hyper-v. for hyper-v 's guest os connecting to multi vlan, host 's NIC connect to trunk port on switch hub. but I want set host os with VLAN ID(VLAN 10) ,for with a VLAN 10 IP address.
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