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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Simple VLAN Trunking between 2 switches

I am trying to set up a connection between 2 buildings. In building 1 I have the following: Network 1 192.168.2.0/24 Network 2 192.168.3.0/24 Network 3 192.168.0.0/24 Network 4 192.168.180....
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240 views

Duplicate packets on network after disconnecting wireless access point on separate VLAN

We have a network with a few switches. One of these is a 3com 4500, where there are many computers connected, a custom linux firewall and a wireless bridge. The port where the wireless bridge and the ...
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317 views

Can multiple VLANs be provided with multicast addresses by a single MADCAP server?

Can a single DHCP server provide dynamic multicast addresses for hosts in many VLANs using MADCAP, just like it can provide hosts with unicast addresses via ip-helper? Or from a Cisco perspective, ...
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657 views

HP ProCurve & Cisco switches interoperability

I have a couple of questions regarding Cisco and HP ProCurve interoperability. Here's a link to pdf with my network topology. Can someone help me with basic VLAN configuration in such topology? Below ...
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1answer
819 views

iproute and nat across devices

I've got the following configuration: vlan123@eth0 - range 1.2.3.0/24, with 1.2.3.4 assigned to it br2000 - range 10.2.3.0/24 In the ip route I see: 10.2.3.0/24 dev br2000 proto kernel scope link ...
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879 views

Dell PowerConnect 6224F ACL Not Performing as Expected

What I'm trying to achieve is as follows: Allow full access to the device on 10.58.9.32 (our VoIP server), from anywhere on our network. Allow ICMP to flow in all directions to/from any device. ...
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1answer
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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1answer
272 views

Configuring a firewall appliance with 2 VLANs - how are the outbound links on the firewall configured?

We just ordered a sonicwall NSA 4500 firewall and I am preparing a network diagram for its arrival. We have 12 servers in a newly setup rack, a 48-port switch, and a Sonicwall NSA 4500 firewall I ...
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1answer
2k views

configure trunk interface in linux centos7

I have connected 2 trunk interface to server(centos 7 server) nic port for setup vlan tagging. And have enabled 8021q module in server. Configure two physical interfaces as bonding as below ...
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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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1answer
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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16 views

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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14 views

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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1answer
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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40 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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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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2answers
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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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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180 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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20 views

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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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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1answer
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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1answer
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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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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1answer
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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1answer
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 { ...
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96 views

Hybrid Port on Non-Default VLAN - Dell Force 10

I need a help to add ports to a new VLAN on Dell Force 10 switch. It is a simple scenario, but there is a problem: all ports are in VLAN5, which is not the default one. don't ask me why, it was like ...
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1answer
233 views

how to set skb->priority of ARP packets

As the title already specifies, I'm looking for a way to set the linux skb->priority of outgoing ARP packets of a given interface on my linux machine that is used as a router. The skb priority is ...
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1answer
151 views

multicast routing between vlan

I am trying to create a multicast messaging service between vlans. When both multicast client and server are in same vlan, the client receives the packet without any issues. When client and server in ...
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13 views

How do I setup a VLAN or STATIC ROUTE to simulate a procution network?

I have a test lab that I am trying to set up. It is not possible to set it up physically like the production setup since there are no extra routers. The production set-up looks like this: Production ...
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48 views

Problems to configure Mellanox SN2700 switch to hand out ip addresses to connected servers

I use the Mellanox SN2700 switch (with MLNX-OS) to connect 3 different servers. How can I configure the switch to hand out ip addresses to each server? Is that possible given that the switch possesses ...
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29 views

Use VLAN tag wtih SSTP traffic

I'm repurposing an old Server 2012 R2 machine as an SSTP VPN service for certain company-owned laptops. I'd like to mark the VPN traffic with a separate VLAN tag. I know I could multi-home the ...
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42 views

ipmitool disable vlan via raw

how is it possible to disable vlan via "ipmitool" or "ipmicfg" with raw commands? ipmitool raw Not enough parameters given. RAW Commands: raw <netfn> <cmd> [data] Network Function Codes:...
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1answer
55 views

New to VLAN configuration. What am I doing wrong?

I have a network using an M4100 switch connected to an EdgeRouter Infinity. I'm also connecting to the EdgeRouter over PPTP for configuration and testing purposes. I've created VLAN 80 on the M4100 ...
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200 views

rhel bridge + vlan tag network for KVM

I just did some search of my question before asking this, however I'm too new to the networking of KVM in red hat enterprise linux therefore most of the information helped a little. in my lab, a RHEL ...
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43 views

add common route to multiple vlan in centos

I have 2 lan cards in my centos 6, one for internet and another for vlans. I have configured 4 vlans: ifcfg-eth1.10 DEVICE=eth1.10 BOOTPROTO=none TYPE=Ethernet ONBOOT=yes HWADDR=00:00:00:00 IPADDR=...
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VLAN tagging on bridged Xen VM

I am a little confused regarding VLAN tagging and how it works on bridged virtual machines. I am testing an XCP-ng Hypervisor (Xen type-1) that I run as guest VM on Windows and VMware Workstation. ...
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362 views

configure bridge network with vlan-tagged interface in ubuntu

i believed that this should be a simple job, however it just can't be solved. of course i did some googling and tried to search questions that has been asked. an ubuntu server 16.04 is installed on ...
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1answer
73 views

Some Kubernetes traffic ignoring VLAN

I have a small Kubernetes cluster that I set up using kubeadm. My servers are connected via a VLAN, which my provider lets me add my servers into. The VLAN adds a network adapter (ens6), which I ...
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1answer
238 views

VLAN not working in MikroTik RouterBoard HAP

I'm currently having some problems configuring the VLAN in our network. Description: get the VOIP phones in to the VLAN2 with the MikroTik RouterBoard HAP. VPN configuration is on this device for the ...
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174 views

Docker Host with multiple VLANs

Background Information I have a server with one physical network interface that is running Docker. This interface is configured as a 802.1Q trunk. To avoid asymetric routing I configured routing ...
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18 views

Communication is not happening after configured multiple VLAN's on a trunk port of raspberry pi device

I have configured multiple vlan's on a trunk port of Raspberry pi device. but whenever i try to connect these vlan's from the MHN server then i am not able to connect. I can able to ping all VLAN's ...
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463 views

VLAN and Inter-Vlan Routing in TPLINK T2600G-52TS

I have a TPLINK Switch model T2600G-52TS, I made 3 VLANs; VLAN 1 (port 1 to 2), VLAN 10 (port 3 to 12) and VLAN 20 (port 13 to 48), I have assigned PVID for each port to desired VLAN, VLAN 1 is for ...
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48 views

OpenVPN client as gateway to its LAN

My problem is that my work LAN is using mobile internet provider to access internet, so none of the PC's neither our router is accessible from Internet. I'd love to have possibility to connect to ...