Questions tagged [vlan]
Group of hosts with a common set of requirements connected as if on the same broadcast domain despite physical location
1,279
questions
2
votes
2
answers
2k
views
Tagged VLAN on KVM with macvtap driver
I've setup a pfsense guest on KVM and and trying to pass tagged and untagged traffics to the VM for obvious reasons. My setup looks like this -->
The KVM has 2 NICs(both virtio type):
1st(for ...
0
votes
1
answer
477
views
Connect 2+ LANs into a Single LAN and Access LAN Remotely
I have two Ubiquiti Dream Machines (just upgraded from Netgear and I am blown away by the difference in quality.) I have one of the Dream Machine routers at home and one at my office, each with its ...
1
vote
1
answer
699
views
Set up KVM host with multiple VLANs, each attached to "its own" external IP address
I'm trying (and having a hard time) to setup a clean KVM environment with: an Ubuntu (20.04) host (with a single NIC), multiple ubuntu KVM guests, 2 public IPs, and one Vlan per IP.
Basically ...
0
votes
0
answers
64
views
Is it possible to create a new network on a LAN with another router?
I have a main router (Zyxel XMG3927-B50A) in my house that is a gateway on 192.168.1.1 connected to the WAN and I have another router (DrayTek Vigor2830n) that is connected to the main router. Is it ...
0
votes
0
answers
1k
views
Unable to Ping IP Addresses on VIF interfaces on VyOS
I'm having issues with 2 VyOS routers, not being able to ping IP address on VIF interfaces. Below is the configuration on the router, which is also running BGP (which I've confirmed is working as ...
1
vote
1
answer
54
views
Fiber to copper switching - small network requiring robust solution
I have a simple setup which appears to require a clever solution; hoping someone has some ideas.
Network:
4 data generating computers, each with a copper->fiber media converter
2 data analyzing ...
0
votes
1
answer
191
views
Traffic not traversing VLAN over multiple hops?
I am configuring a new Cisco edge switch stack, and temporarily I am trunking this stack through another edge switch back to my core switch (no spare fiber pairs to use to trunk directly). This is ...
1
vote
1
answer
2k
views
Multicast not working on macvtap device
I have a problem with my virtual network and IPv6 network discovery (multicast traffic).
(The setup might seem a little bit involved and I don't remember the exact reasons for every design decision. ...
0
votes
1
answer
1k
views
Obtaining IP Address when Using NPS/RADIUS with existing lease from Windows DHCP
Problem: I have DHCP clients on a Windows AD network contoso.local, that often can't get an IP address after successfully authenticating over the RADIUS/NPS Server. I found that if the device has an ...
1
vote
0
answers
310
views
Multiple private networks across multiple hosts (KVM, OpenVSwitch)
I had asked this question on SuperUser, looks like it wasn't the correct forum. Hopefully ServerFault is the correct one.
I am working on a project, running KVM virtualization on 4 different host with ...
1
vote
1
answer
2k
views
Adding a VLAN (over bond/lacp) interface to bridge makes physical interfaces to go down
I have a working configuration of a team interface bonding two physical interfaces, with several VLANs.
ens1f1 ----- |--- team0.1826 (172.18.x.y/28)
|--- team0 -----|--- team0....
0
votes
1
answer
913
views
Bridge interface with VLAN tagging
I need my Proxmox instance to accept traffic from another VLAN and I'm having trouble with setting the interface correctly. I have 1 NIC, I've configured a port on my switch as a trunk interface, now ...
1
vote
2
answers
1k
views
How to expose a VM to the local LAN but not the Internet?
I'd like to wire up a VM with LAN access but restrict it from accessing the Internet. I've come across a couple of comments—such as this one—indicating that this can be done via two NICs, but the ...
2
votes
0
answers
2k
views
How do I stop STP from blocking ports assigned to different VLANs
I have a spanning tree issue on my Cisco SG500 SMB Switches that I could use some help solving.
Here is a diagram of my setup:
SW1 (ports 44-47, VLAN 10) connect to port 43 (VLAN 10) on SW2, SW3, SW4,...
0
votes
0
answers
183
views
Mikrotik RouterOS - How to prevent all devices in a VLAN from initiating any connections outside of the VLAN? [duplicate]
I'm using a RouterOS device as a router on a stick.
I'd like to isolate a certain VLAN from the outside world so that the VLAN cannot instantiate any connections to other VLANs or to the Internet (WAN)...
0
votes
0
answers
31
views
VLAN 'Bridging' for Core on Multiple Networks
I think I have a very unique use-case that I need help with since I am not a network engineer. Here's the layout. I help operate a gaming floor network for a Casino. The thing that I noticed right ...
1
vote
1
answer
335
views
Computer getting Unable to Identify Network UNLESS Vlan is changed
Question moved from Network Engineering to Server Fault.
This is a problem that has long plagued this environment.
At seemingly random times (measured generally in months), a computer may suddenly ...
2
votes
2
answers
34
views
Could servers with different net-ids be in the same VLAN [closed]
Could I theoretically have one server with an ip address of : 10.10.10.1 and another server with the ip : 10.10.11.2.
sign them the same vlan id on the switch, and have communication between them (say ...
1
vote
0
answers
98
views
Hyper-V virtual switch experiment
I recently learned that windows generally, server 2016 in my case can make use of the hyper-v virtual switch on the host machine as a way to tap into different vlan's.
I have a repurposed gigabyte ...
2
votes
0
answers
193
views
Secure Diskless System - NFS as root
I've created a diskless Debian installation with root filesystem over NFS, and boot loader on a USB (this computer has issues booting from PXE for some reason). My setup is similar to the one ...
6
votes
2
answers
2k
views
When to use routers and when to use layer 3 switches [closed]
If you were to connect two buildings on the same site via fiber, what is best to use - routers or layer 3 switches? The layer two switches in each building have VLAN's, so these will either connect to ...
1
vote
1
answer
160
views
VLAN AND PHP VIRTUALBOX
I have an ubuntu server with 2 network cards and I'm currently using only one network card.
In that server I have php-virtualbox installed. The server is connected to a switch port tagged for ALL ...
1
vote
1
answer
2k
views
VLAN aware bridging for KVM hypervisor on debian 10 (buster) and later
I am setting up a new KVM hypervisor and the VMs will need to connect to several VLANS (one VLAN per VM). However I can't find good documentation or instructions on how to configure the hypervisor or ...
0
votes
0
answers
608
views
Assigning proper vlan id tag to a QEMU-KVM Centos 7 virtual machine
I have a Centos 7 QEMU-KVM virtual machine located at a Centos 7 physical server. Both are in a network that uses vlan ids. Also the Network Admin Guy told me to assign the VLanId 33 to the Virtual ...
0
votes
1
answer
1k
views
VLAN tagging for non VLAN compliant devices
Okay so I'm a little new to VLANS, so forgive me if this is a silly question. I have a firewall set up with a few VLANS:
ID 1: This is the primary, and set to untagged. This will be used as a ...
0
votes
1
answer
897
views
IPv6 network fails on Linux router
IPv6 fails on ARMBIAN router
I have a armbian box (RK3328 board + 1GB DDR3 + 8GB eMMC). The box has only one NIC, and acts as a linux one-armed router. IPv4 network works normally, but IPv6 fails.
I ...
1
vote
1
answer
3k
views
about ubuntu and vlan /etc/network/interfaces
I have an ubuntu server and I want to set a static ip for it.
The ip will be 192.168.1.7, the subnet mask 255.255.255.0 the gateway 192.168.1.1 and the VLAN 50.
What lines should be in /etc/network/...
1
vote
1
answer
1k
views
Does a trunk port not half the bandwidth the way connecting an access port would?
If you connect a trunk port instead of an access port from your managed switch; does the bandwidth not get cut in half when the vlan is accessed on the managed switch's access port for that vlan?
1
vote
1
answer
887
views
pfSense on ESXi VLAN and interface definition dilemma
I'm trying to set up a virtualised pfSense router in ESXi on a Dell server. After many hours of reading, experimenting, watching Youtube videos etc, I'm close to pulling my hairs out...
The setup:
- ...
0
votes
0
answers
388
views
win Server not responding to DHCP Discover on vlans
Im pretty new to the topic, Im an electronics engineer so im naturally missing something in my IT config :-)
im trying to set up a network for a non-profit organisation (small sports club) with the ...
0
votes
1
answer
1k
views
Are devices on the same VLAN considered on the same network segment? [closed]
Say you have two network segments connected by a router. In my previous question we found that the two network segments are not on the same network segment when connected by a router. Now say you put ...
0
votes
1
answer
14k
views
Vlan manager does not automatically disable macs
I want to implement a client infrastructure where the devices connect to the network in different vlan.
I installed a freeradius server connected to our Active Directory. I have enabled the switches ...
0
votes
0
answers
1k
views
bridge isn't forwarding non local traffic
I'm experiencing the following issue, i have two virtual machines connected and vlan tagged traffic is passed lets say from A to B.
The traffic passed from A to B is tagged and I need to strip the ...
0
votes
1
answer
3k
views
How to configure VLANs along with Libvirt/KVM/QEMU and OVS?
I am using Debian 9 machine as a router with two interfaces:
eth0 for WAN
eth1 for LAN
The eth1 has subinterfaces for multiple VLANs (eth1.10; eth1.20; eth1.30) and has trunk connection to managed ...
4
votes
0
answers
784
views
Layer 2 Broadcast filtering on VLAN? (Access ports on Cisco SG-500-52MP)
This is my first time setting up VLANs on a Cisco so I've probably made some mistakes - would appreciate some suggestions. Thank you in advance.
...
From my understanding of switches, when a layer ...
0
votes
1
answer
654
views
GuestVMs in a different VLAN than host in a HyperV Failover cluster
I'm smashing my head against a wall. I can't seem to get my guest VMs to use a different VLAN than my host machine.
I have a 2 node Hyper V cluster(2016). Each node has 2 10Gig NICs in a Team. This ...
1
vote
1
answer
2k
views
OVS Bridge — How to Toggle a Port Between VLANs?
I am an Old School network guy trying to do some development work on an OVS Bridge. I need help figuring out the syntax to toggle the OVS bridge interfaces between VLANs.
First, some system ...
0
votes
1
answer
393
views
Ubuntu Routing: Dual Nics with 2 Vlans
I am new to linux routing. I have an architecture similar to this
. I realize this network architecture is fundamentally flawed however I am not permitted to change the architecture. I did some ...
1
vote
0
answers
112
views
How can I put a WiFi client and an Ethernet client to the same group?
I have wireless interface wl0 and ethernet interfaces eth0, eth1, eth2, eth3 all in the same bridge br0. Now I have to put one of the wifi clients and one ethernet client to the same group so that ...
1
vote
1
answer
2k
views
CentOS 7, KVM, bridge, VLAN, bond and no guest traffic
I'm running into an issue where my KVM guests have no network traffic in- or outgoing. After a lot of hours debugging I'm pretty sure I'm missing something essential.
What I have a server with 2 10 ...
0
votes
1
answer
1k
views
Bridge over VLAN interfaces causes broadcast storm
I am doing experiments on my Proxmox server. The purpose of the expriment is to establish reliable and fault-torrant communications between two PCs that control industrial equipment. but I am puzzled ...
1
vote
1
answer
901
views
LACP and VLAN routing correct network setup
I am trying to understand the correct way to do LCAP with a VLAN and have all the routing be correct.
Hardware
OS:FreeNAS-11.2-U7
Server:(2) Intel(R) Xeon(R) CPU E5-2660 v3 @ 2.60GHz
128GB ...
0
votes
1
answer
564
views
LCAP and VLan on FreeNAS box
I can not seem to get the FreeNAS GUI to come up when I try to use link aggregation. I have been googling for days and I am totally lost as to where I am going wrong. I will list the equipment I have ...
0
votes
0
answers
2k
views
Ubuntu 18.04: Can't SSH into server's VLAN interface from my Cisco router
I recently configured VLAN interfaces on my relatively new Ubuntu 18.04 server which has two physical interfaces: eno1 and eno2. I have configured them using the netplan utility.
My goal is simple: ...
0
votes
1
answer
1k
views
How to move multiple, random ports to a vlan on a cisco switch
I'm very new to Cisco networking. We had a Cisco engineer set up vlans on our network switches and then gave us instructions for moving our existing ports to the voice vlan he created.
I've moved ...
1
vote
0
answers
955
views
Attach KVM VM to vlan-filter capable bridge
I am trying to use new vlan-filter capable bridge on Virtualization Host running OEL 8.1. It does not support OpenVSwitch out of the box and I think vlan-aware bridge might work.
Now I have (...
1
vote
0
answers
2k
views
VLAN Config on Mikrotik RB4011
I'm trying to configure the router to have two subnets 192.168.1.0/24 and 192.168.2.0/24. The first subnet is the default and all ports should use this as the default IP range, the second subnet ...
0
votes
0
answers
97
views
DNS A Records Disappear On Multi-NIC Server
I have a 2 Servers running as a top Level DCs on a Parent Domain. They are running DNS for the following addresses.
192.168.1.X (DHCP)
192.168.10.X (Static)
I have 2 servers running as child level ...
3
votes
1
answer
1k
views
VLAN not working on PFSense (SG 1100) with HP switch (HP E3500-48G-PoE yl)
Recently I bought a PFSense server (SG 1100) and a HP switch (HP E3500-48G-PoE yl). My idea is to create VLANs on the PFSense server, and use them on the connected HP switch.
I have found a ...
2
votes
1
answer
159
views
Dell PowerConnect 2724 VLAN frame type filtering issue?
The endless VLAN headaches (and questions), eh?
I really have no idea how to title this one, do not judge.
I'm currently configuring VLANs on a Dell PowerConnect 2724 switch. Currently, all ports ...