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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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Add unmanaged switch to VLAN port

I have a situation where needed to create network within about 20 offices. Typically each office is rented by different company, but some of them has two or more rooms. So i have no idea how many and which devices they going to connect. I am…
Y Borys
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tcpdump - shows VLAN tag, but filtering doesn't work?

I'm running tcpdump on a mirrored port and when I use a simple tcpdump command it shows the VLAN id: tcpdump -i eth1 -n -e 22:02:53.308715 78:31:c1:c6:c8:9e (oui Unknown) > Broadcast, ethertype 802.1Q (0x8100), length 114: vlan 10, p 0, ethertype…
SofaKng
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inter VLAN routing with Ubuntu

I have 4 VLANs created and I'm trying to use my Ubuntu machine as the DNS,DHCP, and L3 router. I want my 4 VLANs separated but still able to talk each other. Here is a bit about my setup. Cable modem (Bridged)-->Ubuntu Server box (see…
dsmigelski
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802.1q PXE boot

I've been using CrucibleWDS for the past year to image machines in my environment. My dhcpd.conf file lists the PXE boot information for clients attached to the particular network I use for imaging. For efficiency's sake I'd like to merge that…
Adam
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Cisco SG200-26 - Can't change management VLAN

I've purchased a new SG200-26 switch and upgraded it to the newest possible version: I configured multiple VLANs - nothing special - however if I try now to change the management VLAN (as I did multiple times for my SG200-8 switches) I simply…
Omegavirus
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VLAN Communication between Cisco ASA 5510, and VMWare ESXi 5.5

I've having a problem, where my Cisco ASA 5510-v8.2 can't communicate with VM's in a VLAN specific port group. The Cisco ASA is currently sitting in front of a group of VM's that have public IP's. That part needs to stay the same. In addition,…
Shane Chambers
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VLAN ID over DHCP for Management Interface of Fortinet FortiAP

When configuring the FortiAP device it's desirable to configure the VLAN ID for the tagged management network. Accordingly to the manual it's possible to do so by "telnetting" to the FortiAP device and setting the variable AP_MGMT_VLAN_ID by…
Vinícius Ferrão
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Routing on Bonded VLANs

I've got a linux d/b server (OEL 6.4 but effectively Redhat 6 I believe) with bonded nics connecting to juniper switches. I've split the bond up into multiple vlans (bond0.11, ... bond0.18) with IP address ranges 192.168.X.Y/22 so that the d/b…
Mark Fisher
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Configuring VLANs on HP 1910 switch

I understand how VLANs work, but am not quite sure what the various settings in my HP switch actually do. I have an HP 1910 switch, and I'm using the web interface to configure it (personally I'd prefer the CLI, but we have some CLIphobic people…
Grant
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Configuring Container with bridges and vlans (server only?)

I have two groups of lxc contianers on a server and want to isolate their network traffic for security reasons. I will be using port forwarding so the containers much each have separate IP's. I know I must subnet both groups and intend to give each…
user108168
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Is there a way to pass VLAN tagged frames through managed switch?

I currently have a managed switch (DGS-3120-24SC) configured for private VLANs (secondary and primary port groups). Secondary ports are isolated from each other and forwarding is not possible between them. However they can communicate with all…
squirrely
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VMware vSwitch and double tagging (QinQ)

I'm experiencing an issue while trying to pass double tagged through a vSwitch. A physical interface on the VMWare host machine is receiving double tagged traffic - the outer tag differentiates multiple switches (mirroring remote tag) and the inner…
vobelic
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iptables: match only untagged traffic on an interface with VLANs

As far as i know, there is no way of distinguishing VLAN traffic in iptables on the master interface (that is the interface to which virtual VLAN interfaces are added with vconfig or ip link add link; I don't know if that's the correct term, I…
Sebastian Schrader
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vconfig not tagging outgoing packets with vlan tag (Ubuntu)

I am trying to experiment with a vlan interface on my desktop ubuntu machine. The desktop has only one single interface (eth0) connected to the company LAN. After using vconfig to create the vlan interface, running wireshark on the interface does…
Gopal
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Cisco VLAN across few switches

I have one CISCO SG-300-52 switch in Layer3 mode, and 3 x SG-300-52 in Layer 2 mode. Currently they all connected together with spanning tree loops using link aggregation. I am running 192.168.0.0/16 subnet on this setup. There is a DHCP server…
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