Questions tagged [vlan]
Group of hosts with a common set of requirements connected as if on the same broadcast domain despite physical location
1,166
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181 views
How to tag IPv4 and IPv6 packets with different VLAN tags on a Linux box?
I want to tag incoming IPv4 and IPv6 packets from a dual stack enabled connection with different VLAN tags, e.g. IPv4 packets should go to VLAN4 and IPv6 packets should go to VLAN6. To be more general,...
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80 views
How to connect macvlan to the internet?
I want to connect macvlan to the internet, but i can't.
I added macvlan to the network namespace, what to do next?
I am using VPS server (Cloud VPS), OS Debian 10
My default gateway, outside the ...
0
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1answer
136 views
VLAN support with libvirt for linux bridge to virtual machines
I'm using systemd-networkd to configure network interfaces managed by libvirt for KVM (Kernel-based Virtual Machine) with Debian Bullseye on all nodes. I want to have transparent VLAN support on the ...
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2answers
33 views
How do I provide Internet Access to both of my VLANS?
I have a TP-LINK T1600G-28TS, and I have 2 different VLANS (10.0.0.0/24 ID 101 and 10.1.1.0/24 ID 102), their IP addresses are defined by the switch's DHCP server. This part is working fine, I can see ...
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1answer
75 views
QEMU / KVM - Dedicated 802.1q VLAN for each VM - Communication only via router
I have a Linux firewall router (dedicated machine) with multiple ethN interfaces (my "big firewall"). All forwarded traffic is filtered by a set of iptables rules (default policy DROP).
...
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1answer
48 views
VLAN passthrough security
Currently I am working on designing a network. The problem is that at a certain point I got confronted with a weird request. The client has made some thoughts of her/his own. Now I am troubled because ...
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0answers
33 views
Can't see docker ports from external machines when using a veth interface with an OPNSense KVM
Quick summary of the setup:
Ubuntu Server 20.04 with 4 network ports
OPNsense router running in libvirt KVM
One port is WAN, three ports are LAN (bridged)
Router works great
Server (same one running ...
3
votes
2answers
360 views
Why am I seeing unicast packets from a machine on another VLAN?
I'm (still) trying to properly configure VLANs on a level 3 switch (Netgear GS516TP).
Basic scenario: there are three VLANs: VLAN 10, 11, and 12, with respectively three ports, and three machines.
10....
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0answers
67 views
added vlan interface, main host not reachable
I have a VM server running Ubuntu on the 192.168.1.0/24 network. I am trying to add a vlan tagged subinterface that will be used for a VM that will be in a DMZ on my network. I added the subinterface ...
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101 views
Hetzner vswitch with public addresses using router - how to get to the internet?
I am using a Hetzner vswitch with some public IP addresses and I want to use them on some virtual machines.
The whole config is as described in my larger question where I say that it feels like data ...
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31 views
VLAN tagged bridge to virtual machine - seeing network chatter but ssh/ping don't work
I have a VLAN-tagged network going through a bridge to a virtual machine, and I can see network traffic on the virtual machine using tcpump, I can't ping or SSH it.
I run tcpdump -n -e -i br4003 host ...
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10 views
experimenting with vlan setup in terms of inspecting
I initialized vlan test interface over default enp7s0, using ip link add link enp7s0 name test type vlan id 2. As I have very limited experience with the configs of networking, I left things like ...
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1answer
33 views
Connect two switches with two VLANs each
I have two switches (A and B), each one divided into two "Sub-switches", i.e. two VLANs.
Port 1 to 12: VLAN 100 (untagged)
Port 13 to 24: VLAN 200 (untagged)
Now, I want to connect the ...
1
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0answers
45 views
Linux 5.9 VLAN interfaces don't receive traffic unless promiscuous mode is enabled
I've just upgraded a NAS running Debian Buster to Debian Bullseye. This included a kernel upgrade from 4.19.0 to 5.9.0, and a systemd upgrade from 241 to 247.1 (the system is using systemd-networkd ...
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0answers
63 views
Netplan will not assign given IP from yaml file
I have an Ubuntu 20.04.1 system and I am trying to set up the ethernet adapter with a static address and a vlan with a static address - here is my yaml file:
network:
version: 2
renderer: ...
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1answer
159 views
How to configure subnets/VLANs to restrict access to WAN/other VLANs?
I manage the networking for our (very!) small church as a volunteer. Currently everything is set up on a single /24 IPv4 subnet. I'm wanting to break these out into VLANs for increased security, and ...
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1answer
30 views
Using netns to force Java application use specify IP
My VPS provider assigned 4 IPv4 to my vps. However, This assigned to single NIC, and VLAN not working(Maybe it is my configuration problem). If I try using VLAN, I can't get external network using ...
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1answer
83 views
How to make the devices belonging to two separate VLANs to communicate together?
I want to set up multiple VLANs in order to be able to isolate different types of devices from each other. More specifically, I want to restrict what Wi-Fi devices can see when exploring the network: ...
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24 views
ip addresses on Vlan
I have a question maybe a dumb one but I got just started exploring VLAN's.
I got a vlan and I need to give it a IP address and I have two switches.
Can the IP addresses on the different switches be ...
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0answers
21 views
inter vlan routing and access switch default gateway
I have a question. If we have 5 2960 layer 2 switches with vlans 2,3,4,5,6 that they are connected via trunk port to 3850 and we've created vlans(2,3,4,5,6) on 3850 and gave them an ip each in it's ...
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17 views
Create simple vlan with internet access for connected device
All I want is to create a simple vlan with a single device connected to it, and this device should be able to access the internet.
I need this vlan for security purposes, so that the main network isn'...
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45 views
How to bind maria-db server to external ip on eno1 and vlan ip on eno2
Server version: Ubuntu 18.04
MariaDB 10.1
On eno1 I have an extra failover IP configured
On eno2 I have a VLAN configured
I read that MYSQL can bind to more than one IP using separated with a comma.
...
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0answers
140 views
Netplan fails to bring up VLANs
I'm trying to have a properly configured Ubuntu 20.04 server network at boot.
I have an physical interface connected to a trunk so I want to define some vlan tagged interfaces on it. I'm using netplan....
1
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1answer
215 views
Why are untagged VLANs configured separately from the port PVID?
After misconfiguring a switch port yesterday, I'm curious: in what situation would you configure an untagged VLAN on a switch port and not set the PVID to that same vlan?
On all the switches I've ...
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0answers
49 views
Ethernet frames duplication when using VLAN interfaces
I have three processes on linux machine:
First is using socket, which is bound to all network interfaces.
The second is sending ethercat packets by using broadcast (ethercat doesn't use IP layer).
...
1
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2answers
258 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
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1answer
101 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
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1answer
122 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 ...
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0answers
26 views
Add interface option disabled on a NIC Team
I have a Windows Server 2019 VM, running under Hyper-V on a Windows Server 2019 host. I need the VM to have two different IP addresses, one of them in a specific VLAN. Both need to be configured for ...
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39 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 ...
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0answers
130 views
Turris Omnia Router and VLAN with DHCP
We have been trying to achieve this task for a week now, and this forum post is kind of my last hope… Since I am pretty new to networking as a coder it might seem like an easy to answer question but ...
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198 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 ...
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0answers
141 views
LXD Container - Static IP over Bridged VLAN
I have an alpine LXD container that I want to connect to my VLAN 10 using a virtual bridge already set up within the centos host machine.
I made a representation of the network here : Network Image
...
1
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1answer
46 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
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1answer
72 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
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1answer
268 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
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1answer
102 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 ...
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0answers
156 views
VMware nested ESXi + pfSense + VLAN trunk lab
I got a lab issue. The environment is:
A nested ESXi env
3 x ESXi 6.7 U2 VMs within the 1st level ESXi
One VCSA 6.7 U2 VM within the 1st level ESXi
A pfSense 2.4.5-p1 VM within the 1st level ESXi
2 x ...
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0answers
46 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
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1answer
151 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
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1answer
169 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
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2answers
91 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 ...
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0answers
198 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,...
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0answers
24 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)...
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0answers
24 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
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1answer
36 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
2answers
25 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 ...
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0answers
30 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
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0answers
28 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 ...
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27 views
linux bridge can merge vlan?
I have a PROLINK router. it`s bridge set below:
# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.000c120060b0 no eth2.1
...
