Questions tagged [vlan]

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

287 questions with no upvoted or accepted answers
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Unable to make work both private and public ip network on openvz container in Proxmox

I'm using Proxmox 3, it is a fresh installation. For those who know, I'm using OVH Vrack 1.5 (along with a previous Vrack 1.0). My server has two interface eth0 and eth1, I succeeded to configure ...
4
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0answers
463 views

VLAN Communication between Cisco ASA 5510, and VMWare ESXi 5.5

I've having a problem, where my Cisco ASA 5510-v8.2 can't communicate with VM's in a VLAN specific port group. The Cisco ASA is currently sitting in front of a group of VM's that have public IP's. ...
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0answers
1k views

VLAN ID over DHCP for Management Interface of Fortinet FortiAP

When configuring the FortiAP device it's desirable to configure the VLAN ID for the tagged management network. Accordingly to the manual it's possible to do so by "telnetting" to the FortiAP device ...
4
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3answers
7k views

identifying vlan packets using tcpdump

I'm trying to figure out the vlan tagged packets that my host receives or sends to other hosts. I tried tcpdump -i eth1 vlan 0x0070 But it didnt work. Has anyone tried to view the vlan packets ...
4
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0answers
362 views

Configuring Container with bridges and vlans (server only?)

I have two groups of lxc contianers on a server and want to isolate their network traffic for security reasons. I will be using port forwarding so the containers much each have separate IP's. I know I ...
3
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0answers
203 views

Multiple Subnet, Same Gateway

I have a nexus3000 switch that has a L3 connection with an uplink switch. (172.18.186.129-130/30) ... In downlink, I have multiple servers and VLANs and I have a range of IP-addresses (172.18.186.0/...
3
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0answers
752 views

Multi vlan internet access via Watchguard

i'm pretty new to network and routing so i would appreciate some tips on this. I have a firewall(watchguard x1250e), connecting to a switch(Nortel Baystack 5510) with multiple vlans for internet ...
3
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1answer
261 views

Unicast traffic between hosts on a switch leaving the switch by its uplink. Why?

I have a weird thing happening on our network at my office which I can't quite get my head around. In particular I can't tell if it's a problem with a switch, or a problem with configuration. We have ...
3
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0answers
2k views

Configure vlan on Netgear switch via SNMP

I am trying to configure vlans on a netgear GS752TSX from the Linux command line with netsnmp. I have created vlan 99 on the web interface now want to control the pvid settings, egress and tagging. I ...
2
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0answers
136 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 ...
2
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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 ...
2
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0answers
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 ...
2
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1answer
459 views

hostapd: mapping MAC address to VLAN ID (static mapping via accept_mac_file)

I want hostapd to assign each station a given VLAN based on MAC address. BTW, my network is quite small. Using RADIUS would be an overkill. According to the hostapd manual: Optionally, the local ...
2
votes
1answer
113 views

Seperate network connection on server with 2 NICs

This is the setup we are aiming for in the picture. As you can see, the supervisor server (CentOS 7.5) has two physical nics (eth0, eth1). One of the design goals would be, to have eth0 allowed to ...
2
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0answers
2k views

VConfig error: cannot add vlan interface

I started working with VLAN kernel capabilities only recently and found a pretty challenging domain. I thought I had almost everything in control but then found a problem which I am apparently unable ...
2
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0answers
160 views

Does “broadcast-address” needs to be within defined subnet in dhcpd.conf?

Ideally, broadcast address should be last address of defined subnet.But I don't see dhcp server enforces such restriction.A brodcast-address defined outside subnet in dhcpd.conf is accepted by dhcp ...
2
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0answers
353 views

Hyper-V VLANS working, but VLAN trunk does not. Native VLAN works.. WEIRD,

Trying to get VLAN & Trunking to work in Hyper-V. I have two VM's on the same Network. SCVMM and Host1. Host1 should be a Trunk for VLAN 7-12 and Native VLAN 10. I then put SCVMM on VLAN7 via the ...
2
votes
1answer
1k views

Access remote VLAN over IPsec VPN using Zyxel routers

I have a central site with a Zyxel Zywall 310 and a remote site with a Zyxel USG 20w. I also have a working IPsec VPN between the two sites. PCs on LAN1 of the remote site can access Server1 on LAN1 ...
2
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0answers
334 views

Outlook + Office365 & VLAN issues

I am having major issues with Outlook and Office365. Mail is sitting in my outbox and not sending. This only started to happen after I had implemented a VLAN infrastructure at my office. I have setup ...
2
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0answers
6k views

tcpdump - shows VLAN tag, but filtering doesn't work?

I'm running tcpdump on a mirrored port and when I use a simple tcpdump command it shows the VLAN id: tcpdump -i eth1 -n -e 22:02:53.308715 78:31:c1:c6:c8:9e (oui Unknown) > Broadcast, ethertype ...
2
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2answers
2k views

VM with two NIC on Hyper-V - how to do that?

I'm new to Hyper-V. How do you configure two IP address on the same VM server? Both IP are on different subnets - one in 192.168.x.x and the other 10.x.x.x. There is an uplink (802.1q) between the ...
2
votes
1answer
3k views

pfsense bridge of vlan interfaces

Hardware Setup AMD E1-2100 Mini-ITX Motherboard with Onboard Gigabit (re0) Intel PCI Express (x4) 4-port Gigabit Adapter (igb[0123]) Software Setup pfSense v2.3 I'm trying to replicate my OpenWRT ...
2
votes
1answer
324 views

Creating additional VLANs on Cisco SG200

I would like to create 2 separate VLANs using a Cisco SG200-series smart switch (layer 2) where the devices would not see each other, while being able to connect to the internet. The setup is simple, ...
2
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0answers
419 views

Xen networking - dom0 receives ARP requests but no reachability

Both dom0 and domU are Debian 8. Dom0 network configuration is: auto xenbr0 iface xenbr0 inet manual bridge_ports eth1 bridge_stp off bridge_waitport 0 bridge_fd 0 auto xenbr0.4 ...
2
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1answer
308 views

vlan qemu: guest listening from other guests

I'm trying to simulate a little network of 3 machines using QEMU where a machine (deb1) is directly connected with the host and the other 2 machines (deb2, deb3): Host ...
2
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0answers
519 views

802.1q VLAN echo replies do not include VLAN ID

I am running a SLES11, SP4 kernel on 2 systems. I have 2 NICs connected through a Netgear GS724T switch. I have configured VLAN 400 on the switch. On system 1, I create a VLAN 400 on eth0 called ...
2
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0answers
43 views

Automatically setting DSCP on guest vs employee network

I am working on a 5000 device network (2/3 wifi, 1/3 wired). Half of the wifi connections are guests - so their traffic priority should be lower than the employee traffic. Is there a way to force ...
2
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0answers
1k views

802.1x dynamic vlan assignment not assigning VLAN

I recently dived into 802.1x authentication with dynamic vlan assigment. My current set up contains of: - A client - A SG220 cisco switch (the supplicant) - A freeradius (authenticator) ...
2
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0answers
350 views

Debian does not shut down interface with ip link set … down

I have a really specific question for a trunk-testing environment. I have this network setup: +------------+ +------------+ | | +-----+ | | | eth0 +----...
2
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2answers
3k views

Draytek 2830, Multiple VLANS on Same Port

The Kit Ubiquiti Unifi Long Range Wireless Access Point Cisco SG200-08P Switch (VLAN, POE Support) Draytek 2830VN Router The Problem I need to enable Multiple VLANS against a single port on the ...
2
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0answers
360 views

Separate L2TP/IPsec VPNs with dynamic VLAN assignment

I am working on a Linux (Debian 7) VPN concentrator for different kinds of remote access. One of the offered protocols is L2TP/IPsec because of the client availability. I am using xl2tpd which in turn ...
2
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0answers
146 views

Inter VLAN Routing

I have VLAN 1 and VLAN 2 setup on HP ProCurve Switch, each linked to a different scope on DHCP server. VLAN1 = 10.220.0.0/23 VLAN2 = 10.210.0.0/21 I can't ping VLAN1 devices from VLAN2 and vice ...
2
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1answer
681 views

Trunking between Juniper Ex3300 with Cisco Router

Hy Experts, Please tell how to create trunking with Juniper and Cisco. Cisco 2950 > Juniper EX3300 > Cisco 2621 I create VLAN 100,VLAN 200, VLAN 300 I have create trunk on juniper switch with : set ...
2
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0answers
99 views

Juniper SSG-5 different vlans authentication

In my network infrastructur I have 2 companies right now. Every company has it own vlan. For example: Company A 192.168.100.0/24 Company B 192.168.101.0/24 I want to use a shared vlan for all ...
2
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0answers
4k views

Single Sign On 802.1x Wireless - saying “Connecting to <SSID>”, hangs for 10 seconds, fails with “Unable to connect to <SSID>, Logging on…”.

We are implementing WiFi on Windows 7 machines in our corporate environment. Machines should be able to log into the domain by WiFi as the Machine (Pre-Logon), and as the User (Post-Logon). We have ...
2
votes
1answer
804 views

Virtual bridged networking with VLAN, could not ping

I require a virtual network with VLAN be build between two virtual hosts - which can be (lxc/ vbox -ubuntu or win xp). I tried with lxc and vbox with Ubuntu and was finding difficult to make it work ...
2
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0answers
169 views

dsl router for bridging two lans

I have two office locations that each have DSL service. I have the routers set up so that the two subnets, 10.0.1.x and 10.0.2.x, correctly keep data on each subnet and or pass across to the other ...
2
votes
1answer
222 views

Is is a good idea to put SMTP Shadow replication on the same VLAN as DAG replication?

We have a VLAN for DAG replication, Recoverpoint (SQL Data), and right now SMTP Shadow replication is going over with the production traffic. Should shadow replication be limited to the site? Should ...
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0answers
18 views

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 ...
1
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1answer
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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0answers
40 views

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 ...
1
vote
1answer
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, ...
1
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2answers
192 views

Different Avahi/ZeroConf Services for different VLANs

I couldn't find any reference in the man page for Avahi so here is my question: Is there a possiblity to configure one service (printer) for only one VLAN and another service (printer) for another ...
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0answers
56 views

How to set the mode of port? access, trunk, general

I tried to set (change) the mode of my port, and I read the book and followed it step by step. But I still get a lot of error. There were what I input. (Routing) (Interface 0/3)#switchport mode ...
1
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1answer
2k views

How to Utilize NIC Teaming for Hyper-V VMs with VLAN in Windows Server 2016

I have two Windows Server 2016 with Hyper-V installed. Each server has two ethernet adapters. And each Hyper-V has several VMs. My goal is VMs can communicate with each other if they fall into the ...
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0answers
4k views

NetPlan not applying static IP for VLAN

I setup a new Ubuntu 18.04 server and spend some time fighting with netplan. I only need a very simple network config, but for some reason it does not work and I have no idea what is wrong. I need a ...
1
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0answers
106 views

Cisco Catalyst 3750G series PoE-48 - Private VLAN

I'm working on a Cisco Configuration for the first time and I've run into a problem where the Vlans do not appear to be working correctly, the ports on the switch should be configured to the ...
1
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0answers
526 views

Issue with bond + vlan + bridge on top of systemd-network

We are using two switches (let's call them A and B), and each host (running debian 9) has 2 nics (eno1 and eno2), connected to A and B. Those interfaces are bonded together (bond0) in active-backup ...
1
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1answer
1k views

Windows 10, Virtualbox and Ubuntu VLANs

I have a laptop with Windows 10 and a Realtek PCIe GBE Family Controller. My NIC is connected to a switch in trunk mode (traffic for 2 VLANs transiting via this connection). I would like to setup the ...
1
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0answers
396 views

VLAN on Bridged Interface?

I've been banging my head against this for too long and would really appreciate a second opinion/sanity check: LAN Interface eth1 is bridged together with OpenVPN tap0 on br0 (192.168.2.1). I would ...