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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Explanation of Port Access Control settings for a TRENDnet switch

I'm trying to set up some security settings on a TRENDnet TPE-082WS managed switch, in particular its Port Access Control settings (emulator link; press Settings to see it): The switch's manual is ...
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35 views

TCP retransmissions inside vlan

I want to monitor a service from another machine. Both machines are connected to a VLAN. Both machines can ping and also establish connections to each other. So connectivity in general seems fine. ...
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24 views

Scaling VXLAN overlay without too many tunnels

I'm trying to setup a simple but scalable overlay network sing VXLAN tunnels but having too many VTEPs leads to many many tunnels and I don't know how that can be a good idea. I asked a question ...
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109 views

Cisco Switch: Limit mgmt access to specific VLAN

I want to limit the access to the management console of my cisco switches. My idea was to only allow clients of a specific vlan to access it. In my current physical setup I have three unstacked cisco ...
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38 views

DHCP, VLANs, APs and IP assignements

I have a debian-based isc dhcp server, that works as router/firewall too. I configured a Cambium cnPilot 610 to broadcast 2 SSIDs. Each SSID is associated to a different VLAN. So, in the port where ...
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99 views

VLAN ID conflict

I have two devices not managed by myself (let's call them A and B) that should be directly connected, but due to cabling reasons they have to go over at least 2 switches used by my internal network. ...
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101 views

VLAN Tagging on Cisco Layer 3

I have a Cisco managed switch which I have configured VLAN 2 to separate some networks. The main LAN is 10.3.7.0 and VLAN 2 is 10.3.9.0, with .1 being the default gateway. That VLAN is broken out of ...
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2k views

EdgeRouter X as VLAN-only Switch

The Ubiquiti EdgeRouter X (ERX) has a switching chip on board so that it can be used as an L3 switch instead of as a router. I have another router, we'll call it router-core, which is serving an ...
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1k views

CentOS VLAN tagging is not working

I am trying to enable two VLANS in CentOS 7 and following the article of Redhat. 1.Configure the parent interface in /etc/sysconfig/network-scripts/ifcfg-em1, where X is a unique number corresponding ...
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108 views

Unable to set up bond interface from 2 vlans

Can someone help me to set up a bond interface from 2 vlans using teamd daemon. This is how i'm trying to do: # ip link add link eth1 name vlan50 type vlan id 50 # ip link add link eth2 name ...
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54 views

Can modern switches limit packets based on IP without VLANs or bridge VLANs?

Can the switch HP 2910al, restrict traffic coming to it based on it's IP/subnet settings without using the routing functionality? Or is it possible to configure something like HP 2530 (layer 2) to ...
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271 views

Should I be able to see duplicate packets on both of these interfaces?

I have a Debian based DHCP server, with network interfaces configured for each VLAN in our network (vlan10_), as well as an interface on the network without VLAN (eth0). 2: eth0: <BROADCAST,...
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133 views

2 virtual interfaces on the same vlan

I have one vlan with id 30. The VLAN interface on the host is eno1.30. I need two bridges to access this VLAN. Can I create a new virutal interface on the same VLAN in the same machine and add the ...
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173 views

VLANs, FreeIPA, and AD trust on different subnets - how do the computers see each another?

Let me preface this by saying I am completely unfamiliar with VLAN tagging. I understand the basic concept, but I lack any sort of real-world experience. I am looking into installing FreeIPA for a ...
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354 views

DNS with VLAN issue

I just inherited a network with 2 Linux servers running Debian as a host OS, with VMWare hosting a number of VMs on both, including the domain controllers and some web sites. Here is the issue, each ...
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114 views

Intervlan routing in HP Procurve 2900 not working

Heya networking gurus! I am building a Proof of concept that requires doing some wacky things. All is going well except I can not seem to get my intervlan routing working. Here is a diagram of what ...
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42 views

Connectivity loss with VLan and VSphere machines

I'm facing a very strange situation with some virtual machines on my vSphere setup and I can't quite figure out what is happening. Originally, I am working with a 192.168.9.0/24 network where 192.168....
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272 views

Joining vlans by bridges

What anomalies might happen if you try to join a bunch of vlans by bridges in a cluster of Linux servers? We'll presume, you have a group of servers doing running VMs (qemu-kvm), these VMs have their ...
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180 views

Cannot ping a server. Wan over vlan on Cisco/Linksys switch

I have an old, but mostly unused Cisco/Linksys slm224g4s switch and Mikrotik B2011UiAS-RM router. On a switch I've configured three vlans, two for WAN1 (id:3) and WAN2 (id:4) and third for LAN (id:2). ...
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112 views

Find gateway of VLAN on Linux

I have a Linux box on a network where the network has several VLANs. Of course, the Linux box is on VLAN 1 (the LAN) and I know how to get the default gateway on the LAN using "netstat -rn" and ...
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1answer
82 views

SQL Cluster unreachable from alternate VLAN

I'm having a situation with Hyper-V that I really need some help with. We recently added a 4th physical host to our Hyper-V cluster. It was working fine until this last weekend when some things got ...
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35 views

VXLAN with unicast only transport?

I started looking into VXLAN recently and I am trying to grasp the basic concepts of it. The standard use of VXLAN transport appears to be multicast, however many ISPs do not allow multicast traffic. ...
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166 views

My computer sometime uses ISL instead 802.1q?

My computer is connected to another computer via Ethernet (via a very simple unmanaged switch). I want to make the traffic between the two computers VLAN tagged with 802.1q protocol. My computer use ...
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54 views

Issues with pinging Dhcp server and internet from Vlan 2

I am having issues with our new vlan's allowing access to the internet. I have setup 2 vlans: Vlan 1: 10.0.1.210 255.255.255.0 Vlan 2: 10.0.2.1 255.255.255.0 I have enabled Ip routing ...
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26 views

vlans for corp and guest networks SSID broadcast

Cenario: Two separated physical connections: 01 Corp (Internet, shared network resources, etc) 192.168.10.x 02 Guest 192.168.1.x (Internet only) AP: ZyXEL NWA3560-N Lab switch: HP 1810-24G What I’m ...
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42 views

What value does Microsoft's default 802.1q offer?

So in a general case 802.1q is handy and cool, grab two switches connect them with a single cable, do some configuration and have multiple virtual lans spanning both switches. You can even do funky ...
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45 views

Server can't see VLAN after changing an IP of something else

I used to have a 3COM Layer3 switch on our production floor whos IP was 192.168.0.13 and it was creating VLANs and one of them was VLAN5. I have replaced that switch with a Netgear switch and ...
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105 views

How to connect virtual machines from different proxmoxes?

I have cluster of 3 proxmoxes and I want to create shared network to connect virtual machines from different physical machines. Virtual machines should be able to see other machines from their network,...
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417 views

KVM Build - Team with Native VLAN and Tagged VLANs

I'm trying to get clarity on whether or not what I have been trying to do is possible since I have yet to get this working. I have a server in a lab with two NICs that I would like to team. I then ...
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1answer
89 views

cisco calculate ip-phone voice traffic as tag or untag?

I'm almost confused about what the switch has really done with the voice traffic. I know access port traffic is always "untaged", but actually the "Switch port voice vlan (xxx)" command is used to ...
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291 views

Multiple subnets, multiple DHCP servers, 3 access points, no VLAN

Good day folks, I was working at a customer site which has an odd network setup. The WAN connection is connected to an 8 port dumb switch. The WAN modem provides DHCP for the 192.168.2.0/24 ...
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114 views

Hyper-V cluster - physical or virtual network adapters for nodes?

I just want to state this in advance - I'm not a networking engineer, but I'm trying to learn more about how hyper-v clustering should be built from the networking side. We have a hyper-v cluster ...
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1answer
57 views

Comunication via vlan interface in general mode

I'm trying to understand egress tagged rule in the context of general mode port in vlan. I have an Allied Thelesis AT-8000S switch with two PC connected (PC1<->e1, PC2<->e2). Both PCs have ...
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332 views

2 VLANs, different subnets, NAT, EIGRP

I have following network: http://imgur.com/M4BCWXv So want to connect 2 subnets: VLAN 10 - programmer - network 155.55.3.0 / 26 - left side VLAN 10 - programmer - network 155.55.0.0 / 23 - right ...
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38 views

Does PVST allow to bridge two VLANs?

I am having a Switch Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(50)SE4, RELEASE SOFTWARE (fc1) I have interface FastEthernet0/1 up to interface FastEthernet0/48 are ...
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471 views

Linux bridge over vlan is not working

I have a Netgear Prosafe JGS524E switch where I have configured ports 1-10 to be a part of vlan 10(port 1 of the switch is connected to 192.168.1.0/24). In port 2, I have a Ubuntu 16.04 server where I ...
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441 views

vSphere on same subnet as FreeNAS - how to limit FreeNAS management access to a specific VLAN or subnet?

I have a fairly common setup - vSphere and ESXi hosts using FreeNAS as the VM store. The servers can see each other (obviously) so I want to segregate system admin traffic and user traffic onto ...
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354 views

How to assign an IPv4 domain name to an IPv6 server behind NAT (local network)?

I have a server behind a router that has an IPv6 address. I configured my DNS to AAAA record, but looks like the domain can only be accessed by IPv6 computers. Is there any way to port a domain name ...
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1answer
353 views

DMZ on Hyper-V using VLAN with fortigate

One of my customers would like to publish his HR Portal on the internet, It is a IIS website, running on a virtual machine in a Hyper-V environment. This company has a single host, with 2 NIC paired, ...
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528 views

Windows workstaiton virtual NIC for softphone voice vlan

We are going to be installing softphones on our Windows Vista, Windows 7 and Windows 10 workstations. I have read that it could be possible to setup virtual NICs in the machines and have them connect ...
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61 views

Creating VLANs on a PowerConnect 8132

I have scoured all over dell.com for answers and nothing that really explained/taught me how to do what I want. I have 1 PowerConnect 8131 Layer 3 switch. My router is connected to port 1 and it ...
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69 views

Can't configure vlan on device

I'm new at vlan implementation. I'm trying to manually configure a vlan on my target device. I use these 2 vlan config commands, then I ping an IP address and sniff the packets to look for the vlan ...
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48 views

tenants are building their own server in the share office, how do I give out specific ports to them?

Scenario: A couple of companies are sharing an office as a tenant. Since I don't have much knowledge in networking, I'm not quite sure how to configure the setting of switches and routers. However, ...
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1answer
1k views

Mikrotik Switch Trunk (Tag All) Port

Trying to configure switching on Mikrotik CRS125-24-1S. ether24 is connected to another switch port with tag all (trunk) mode activated ether23 is connected to my ESXi host I just want to add this ...
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446 views

No Internet Access in VMWare VM and specific VLAN

I have a VM that was in a VLAN (3) and has a static IP address. Yesterday i could not connect via rdp and found out that it lost its connection. Things I tried first: Disable / Enable Network Adapter ...
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2answers
748 views

Networking Issue with DHCP and Vlans

We've had this issue for a while now and im at my whits end. Bit of background, we have a simple setup, we have a main vlan for the office, then a few seperate ones for development, testing and ...
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27 views

Need to split a high speed ADSL line for several departments

I'll try to keep it simple! We have a new and very fast ADSL line coming in to our office which needs to be split between 4 different departments. Each department will have a certain bandwidth ...
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1answer
507 views

Guest WiFi using isolated VLAN - Cisco routing

I am attempting to setup a test environment for a guest WiFi network. My aim is to use a separate SSID on a completely different subnet and keep it totally isolated from the management subnet. So far,...
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1answer
552 views

Using VLANs to pass two separate LANs over a single ethernet run (with a twist)- best practice?

I am using two small managed switches each side of single ethernet run linking two rooms, to 'trunk' two VLANS, enabling two separate LANs to pass over it. The source of the each LAN being it's ...
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60 views

VLAN Routing for VOIP

Confession first - my networking skills are not massive but I'm learning fast! We have three VLANs (for the sake of this question - there are actually more but not relevant to the posting). These are:...