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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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How to set up VLAN network

I'm changing my network from having every device on flat network to using VLans. My problem is that we already have a lot of devices on this network(192.168.20.0/24). From theory, I read that each Vlan has to be a different subnet and then I need to…
Paddington
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understanding vlan

I have few questions regarding the functioning of VLANs: 1) Do end hosts (e.g my laptop) would ever see a VLAN ID when it is connected to a trunked or Access port ? 2) As a follow-up to 1, in the normal VLAN setup do endhosts tag the packet or is…
user1126425
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For VLANs: difference between untagged and non-member setting for ports?

The "default" VLAN is VLAN 1, and traffic over ports are Untagged by default (at least, in the switches that we use). We've created VLAN 2 and marked the necessary ports as Tagged, and it's working beautifully. However, all of the ports that I did…
Bigbio2002
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What happens when an untagged frame is sent to a multiple untagged VLANs port?

I am totally new to the concept of VLAN and just read about it today. So sorry if my question sounds stupid. Let's say I set up port g2 on a 10-port Cisco switch as a general port (thus can be part of multiple tagged/untagged VLANs). Furthermore, g2…
Thanh DK
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VLANs and packet tagging

Not a system admin (electrical eng so I develop ASIC's) and I've come across an issue where I need to understand switching better. I have one device (A) that has pre tagged traffic coming out of it and I have two devices (B & C) that will be sending…
mHo2
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Can I set vlan ip to anything?

I'm new to vlans, but I'm thinking to set one up. I'm wondering if I can assign the vlan any network address I want (ex. can I make it say 3.1.0.0/16 if I wanted to?). The reason I'd like to do this is because many computers that would go on this…
Centimane
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Is A Managed Switch With VLAN Support Required

I am wondering if I need to buy a switch which is managed (VLAN support) for my configuration, or will a cheaper unmanaged switch work? I have servers with two NICS each. The first NIC is public and the second NIC is private. The router will plug…
Justin
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Network setup for a multi-tennant office space

I need to set up a new network for a client that will be leasing parts of their office space and providing shared access to internet and printers. Here are the details: Internet access will be shared between tenants. Tenants cannot see each…
JWright
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Understanding Native VLANs

As I understand it (and that is questionable): This pertains to Cisco equipment. 1-Switch traffic on a port, configured in access mode with a static VLAN, is tagged with a VLAN field before being sent out the trunk port? 2-Control traffic is…
Kernel Panic
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Ping is working on the wrong interface on VLAN configuration

I am using Centos 5.3 VM created on VMWare ESXi 4.0.0. I created a vlan interface with tag 3 on my interface eth3 and gave it an IP in the same subnet as other machines in the vlan. When I tried pinging another machine through the newly created vlan…
Sabu Thaliyath
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what happened when native vlan ( let's say vlan 10) arrived at access port vlan 20?

basic scenario: PC A connected to Switch 1 ------ Switch 2 ----- PC B switch 1 has an access port vlan 10 , and also has a trunk link between switch 1 and switch 2 with native vlan 10 configured to both switches on each end. Switch 2 other…
johnsmith
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Basic VLAN setup help needed, HPV1910 Switch->SonicWALL 3600

I'm struggling to get a basic VLAN working across my equipment an HP V1910 switch and a SonicWall 3600 router. Here is what I have: HP V1910 VLAN 1 - Mgmt 192.168.10.x VLAN 20 - Wireless 191.168.20.x The following VLAN interfaces are defined on the…
Michael Show
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Adding VLAN removes earlier virtual IPs in CentOS 6.X

I added some virtual IPs to my eth0 interface in CentOS 6.5, ip addr add 192.168.100.2 dev eth0 I then simply added a VLAN on eth0. vconfig eth0 10 The VLAN was created but it removes any of my added IPs on eth0 (eg. 192.168.100.2). I didn't face…
Ujjwal
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VLANS and Public/Private Traffic

I may reveal some ignorance with this question, but I am really confused. We have 3 static IPs and one gateway/modem with my organization. The gateway/modem is located in a remote area of our building, so we only have one line from the gateway/modem…
professornayr
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VLAN Configuration Conflict, Who Wins?

I'm new to VLANs, so take that into consideration... Lets say that I had a server set up to create a virtual interface that is set to be tagged as VLAN 3. For example, the following Debian config: iface eth0.3 inet static address 192.168.1.1 …
Soviero
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