Questions tagged [vlan]

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

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Add a linux network bridge device between untagged VLAN1 and tagged VLAN100

I want to add a network bridge between a tagged vlan device and the untagged vlan1. That doesn't work as I expected it to work. First I want to show the configuration of the network as it is at the ...
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19 views

Linux interface not receiving double-tagging traffic on its sub-interface

I have configured qinq sub-interfaces on linux, to receive double tagged packets from switch that it is connected. When I try to ping from the other host, 110.10.20.1 to this interface @ eth2.10.2002 ...
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28 views

Using VLAN, IP A shows (and uses) also raw-device addresses

Setting up a cluster with a private IPv4 VLAN, we have the following problem: IP A says: 3: eno1.4000@eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1400 qdisc noqueue state UP group default ...
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27 views

NTP NIC binding

I'm wondering whether it's possible to setup NTP on a Windows Server running 2012 R2. The catch is that I only want one of the two NICs on the server to be used for NTP. Here's a little more ...
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26 views

Tagged ports on HP switch VLANs

wondering if somebody more experienced with HP procurve switching equipment can answer a pretty basic question for me. I'm trying to segment off 3 ports onto their own little network segment. I ...
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How do I use linux vlan bridging as ap?

As part of a bigger task I'm trying to build a simple setup: A linux pc 1 (ubuntu) connected to another linux pc 2 wired, and to another device wirelessly. The device and pc 2 should be able to ping ...
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19 views

Restrict a physical NIC or VLAN to a specific process?

On a Windows operating system, is there any way to have an isolated network interface or VLAN, that is only authorized to communicate with specific processes? The interface or VLAN would be ...
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18 views

VLANs and Trunks on HP Switches

long story short my goal is to configure 3 ports on an hp switch stack that can only communicate with each other, and nothing else on our lan. I created vlan 60 with 3 untagged ports. However, when I ...
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Devices in same vlan cannot ping each other - Possible ARP Issue

The environment is running with Nexus 9K in NXOS mode. Both are in vPC mode and running hsrp with N9K1 active and N9K2 standby. Due to vPC both nodes are running Active/Active for HSRP. Now the ...
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28 views

How to connect two virbr0 on two different KVM hosts?

I have one KVM host with VM's inside which using virbr0 virtual network(10.0.0.0/24). Now i got new KVM host machine for new VM's which must use ip's from same network and to be able to communicate ...
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37 views

No Internet access with DHCP Relay VLANs

I have a router that I can't manage (it is an ISP thing). It is directly connected to a T2600G-18TS (let's call it X) switch. The X switch has a static IP assigned from the routers IP range. I have ...
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41 views

Setting up VLAN: pfSense and UniFi Gear (150w PoE switches, EdgeSwitch 16XG, UniFi Controller, 13 UniFi APs)

I'm have a tremendously difficult time setting up something that seems like it should be easy: VLANS with a pfSense gateway and a bunch of Ubiquiti UniFi gear. The frustrating thing is I've set this ...
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48 views

Configuring iptables when operating KVM virtual machines over a VLAN bridge

I am currently setting up a virtualized environment with KVM that spans across two physical host machines (Host1 and Host2). Both are connected to the same VLAN. The network interfaces on both ...
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86 views

separating three vlans on openwrt

I wanted to make a network with 3 separated VLANs 10.140.1.0/24 10.140.2.0/24 10.140.3.0/24 So I hooked up two routers TL-WR740n with Openwrt installed, and started experiments. First router(10....
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ProCurve Switch 5406zl isolate VLAN for web hosting

Need to host company website in internal network using existing hardware. Still learning how to do things... All VLAN's can talk to each other. How can I isolate VLAN250 from the rest of the network ...
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41 views

Setting up Linux bridge for all VLANs (tagged) when bridges for same VLANs (untagged) exist

TL;DR: Does anyone know how to get bridges associated with a VLAN (like virbr0.101) and a generic bridge that supports all VLANs (like virbr0) to co-exist? Sorry for the rambling backstory, but I'm ...
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60 views

Getting VLAN to work between Polycom VVX phones and Cisco SG300 Switch

I followed instructions listed here --> https://community.polycom.com/t5/VoIP-SIP-Phones/FAQ-Utilizing-VLAN-s-with-Polycom-phones/td-p/38100. But came up short. So I have computers (VLAN 1) and these ...
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25 views

Creating a VLAN Trunk on Azure between VMs

I can't figure out how to build a VLAN trunk between VMs in Azure. For example, Fortinet has 10+ vdom enabled FortiGate appliances, but without a VLAN trunk, its hard to get more then 4 or so ...
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23 views

Netgear M4100-50G routing issues

I configured a Netgear M4100-50G to route between its vlans and the rest of the network (VLAN 1). So far so good. Here's the setup: As seen in the diagram, it is possible to ping the VLAN2 device ...
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49 views

How exactly does vlan traffic flow through a layer 3 switch from one vlan to another on a default route?

I have an office that has a layer 3 Dell switch in routing mode connected to both a Cisco router & a Dell Sonicwall. The network has Vlan 1, 10, and 20. The connection to the internet sits ...
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67 views

DHCP client stops working for specific NIC

Something weird is going on. I had a cable with VLAN 300 plugged into my ubuntu machine. And that worked fine, like this. Jul 9 09:13:16 ruby dhclient[17696]: bound to 85.x.x.136 -- renewal in 1797 ...
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54 views

Route 2 VLANs over one port

Related to, but expended on an earlier question of mine at Route all traffic over Fiber VLAN The fiber internet works nicely, this is the setup; Media Converter | +--- Ubuntu Server ...
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137 views

Netplan doesn't configure VLAN on hotplug of underlying link

We have the following netplan configuration: network: version: 2 renderer: networkd ethernets: ens3: dhcp4: yes ens9: {} vlans: ens9.4000: id: 4000 link: ens9 ...
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Configuration settings required for Cisco UC320W and Dell N1524P compatibility

I'm having issues with my Cisco UC320W controller getting config settings over to my Cisco IP phones using a Dell N1524P Switch. Currently there is a Cisco ESW-540-24P switch that connects to both the ...
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181 views

OPNsense/pfsense on Proxmox with LACP, VLANs and Multi-WAN

I want to set up an OPNsense router (of pfsense if OPNsense sould not work as desired) on Proxmox. I have multiple WANs as well as multiple local VLANs. Since I have more VLANs than physical ports I ...
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52 views

Tagged traffic throught FreeBSD server

i have a cable from provider with two VLANs on it, VLAN1 for internet and VLAN50 for VoIP. I need to take VLAN50 to my 192.168.0.2 server (PBX Panasonic TDE-600) on schema so it can connect to SIP ...
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59 views

libvirt: create a bridged network using openvswitch with dhcp enabled

I am trying to use libvirt + dsnmasq + openvswitch to create a bridged network with dhcp enabled. I created a libvirt network with the following XML: <network connections='1'> <name>ovs-...
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39 views

Route all traffic over Fiber VLAN

Recently, I upgraded to fiber based internet, that works okay but I want to hook that up directly to my Ubuntu box instead of the supplied router. The problem is, even though I can get a valid IP via ...
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61 views

How to create a VPN that maps users into VLANs each?

I want to setup a VPN server that puts each user into a different VLAN. I've got a network with about 200 users in which each user is in a separate VLAN with his own /27-IPv4 network. Which user ...
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What is the difference between vlan_id and vid in /etc/sysconfig/network-scripts?

I am looking at setting up VLAN tagging or Ethernet tagging on the host machine. Specifically on a machine running CentOS 7. In CentOS network devices are defined in text in the folder /etc/sysconfig/...
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103 views

vlan for segmentation, same subnet one dhcp server

I do not know if this is the correct setup. I need to isolate three ports on three different switches from the other ports (update: so they are separated from the others and also have access to the ...
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1answer
56 views

Determining which vlan a machine is on

On a linux machine, is there a way using ip (or ifconfig) to determine which vlan is being used by an instance?
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1answer
121 views

Arbitrary vlan interface name - undocumented configuration?

Today i was playing around with ethernet adapters and vlans in Alpine Linux. I tried to give the interfaces arbitrary names. After looking at the source i had the following example working Ethernet ...
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140 views

ovh proxmox vlan & vrack configuration

I have 2 proxmox nodes in dedicated servers at OVH. Both have vrack enabled and configured and working perfectly. I have 2 linux bridges: vmbr0 created by default by proxmox, with the public IP of ...
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96 views

VMWare & VLANs - why am I able to access one VM but not another?

I have two virtual machines on a VMWare ESXi server - a Sophos Firewall and a Windows Server. On the LAN side of my network, I have a bunch of devices and a Cisco ATA connected to a real switch. This ...
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46 views

Tagged interface not receiving packets?

I have a VLAN ID 69 at interface enp101s0f0 that's not receiving any packets: enp101s0f0.69: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.15.2.5 netmask 255.255.255.248 ...
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Forwarding mDNS packets from an on-prem network to cloud server and back

Problem Statement : We have an application running on an on-prem Linux server configured with a trunk port and its working is tightly associated to multiple VLANs traffic and certain device IPs ...
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33 views

Setting up a dns server with a virtualbox vm running Ubuntu and making it accessible via vlans

I have a virtual box vm I want to use as a dns server for my local network. I have a few vlans setup. The vm host is 10.0.50.2 The vm is 10.0.50.4 I want to keep everyone out of the 10.0.50.4 network ...
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41 views

Sending tagged traffic to lxc container while sending untagged traffic to other containers

I have a situation where I already have several bridges on my lxc host to send vlan-specific traffic to my various containers. I have one container that lives on several of the networks, and was ...
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1answer
62 views

Removing VLAN 1 traffic from a port

If I look at this page for Xen Server VLANs, it says "Configuring the XenServer management interface on a VLAN network is not supported" So then the Server must be on 'VLAN1' yes, my problem is ...
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54 views

802.1Q VLAN Tagged Vs Untagged

If I have a port A which has say VPID 200, has VLAN 200 untagged and also VLAN 150 untagged, does that mean that frames on the switch tagged 150 can reach port A, and open a connection, but port A ...
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60 views

add route table and vlan failed

I'm trying to add two route tables with two virtual Nics, I did the following steps: 1, Added two lines in the file /etc/iproute2/rt_tables 126 net_test_1 127 net_test_2 2, Created two Ip ...
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212 views

Communicating between VLANS without routing - 802.1Q

I have a NVR which I can access on my LAN, I would like some IP cameras isolated on a VLAN to access the NVR using a 802.1Q managed switch only. I want the cameras to connect to the NVR without ...
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28 views

VLAN egres CoS on bond interfaces

We have set up a bond interface with two 10G physical NICs in LACP mode. On top of that we have configured several VLANs. All this works well. Now we like to add egress CoS / Priority to one of the ...
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73 views

RHEL 7.6 - VLAN tagging stops working after system reboot. System unable to communicate with other hosts

In my structure I have a VLAN called 172, which is exclusive to communication between the iSCSI storage and the blades of the server. The VLAN is configured in two Dell PowerConnect M8024 switches, ...
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1answer
252 views

Briding LXD Containers to VLAN

I was trying to do something that is supposed to be pretty easy but for some reason it not work. I want to bridge two LXD containers to the same VLAN. To do this I create the VLAN interface over the ...
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59 views

New Cisco SG350X changing config of SG500 switches

We have about 20 Cisco SG500 Switches in our network configured with various VLANs, trunks, ports etc. We recently needed to install additional network capacity so purchased some SG350X switches as ...
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73 views

How to set the egress priority mappings permanently

I have a setup in Debian buster/sid that uses a tagged subinterface (aka vlan) and works correctly. However I need the egress traffic tagged with COS 3. I can do it manually with ip link and/or ...
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326 views

How do I remove the VLAN ID from my NIC (Netadapter)

So I am running a Windows 2019 datacenter server core running hyper-v which has a Broadcom Gigabit Ethernet BCM5720 NIC with 2 access ports. The Server is patched into a VLAN. So earlier on I ...
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46 views

Subnetting: Access 10.1.0.1 from 10.1.2.1?

Here is the newly configured vlan on my Juniper: vlans { vlan1 { vlan-id 3; l3-interface vlan.1; } } interfaces { vlan { unit 1 { family inet { ...