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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VMs on a KVM host with tagged VLANs

I have two debian9.1-VMs running on one KVM host. If they are both on VLAN1, I can ssh from one VM to the other. If they are both on another VLAN, they can ping but can't ssh each other. If there is a ...
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235 views

KVM guest networking not working when on same vlan as the host

I have KVM running on a CentOS 7 host. The host is connected to the switch with a single NIC to an untagged port, with the PVID set to VLAN 100. I have set up VLAN networking on the host. I ...
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145 views

ProCurve 2910 - ping lost on tagging

I can't figure this out. I have 2 HP 2910 switches, interlinked (A1). VLAN 113 is management, I have an uplink to the core switch on port 20. Pinging and browsing works fine. However, I can't ping a ...
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174 views

isc-dhcp issuing wrong ip for subnet

i've configured a range of IP pools to a new server i've configured. the client contacts the correct router IP for the assigned subnet, but receives an IP completely out of scope for the subnet. the ...
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1answer
2k views

ARP/ICMP issue in VLAN over bonded interface

I've been trying to troubleshoot this for whole day without any success. I have two servers, server1 and server2, both running Ubuntu 14.04.5 LTS and connected to a Cisco sg200-08 switch via LAG ...
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81 views

Setting up an Inter VLAN for new building

Have added a building to our existing motel business setup and looking to utilise a fibre trunk to share a single internet connection between an open guest network (LAN and WiFi to guest rooms) and ...
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1k views

Configure 802.1Q VLAN on D-LINK switches

I am looking for some help on configuring 2 D-LINK switches (DGS 1510-52X on one side and DGS 1210-52 on the other) for my network needs. WAN LINKS on router are actually 2: First is WAN with NAT ...
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91 views

HP 1910-48G internal network can't ping other ip pools

I am struggling with setting up my hp procurve v1910-48G. I created 5 vlans: VLAN ID 1 192.168.0.1/24 <- default VLAN ID 10 192.168.1.254/24 VLAN ID 20 192.168.2.254/24 VLAN ID 30 192.168.3.254/...
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457 views

Procurve Inter VLAN Routing

I have a VLAN routing issue on our network. We have two ProCurve 5406zl's being used as our core switches, each vlan on these switches has an IP address and VRRP is configured on each vlan for ...
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124 views

2 VLANs between four switches

I am having a problem that I do not quite understand with my network setup. I have four switches on the network: Switch A is a managed network switch which is connected to the PC router -- it is set ...
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55 views

More Management VLANS for a switch

I created a management interface in vlan 99 to telnet the switch (2900 series). I also wanted to configure another management interface for the same switch from the computer belongs to the different ...
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1answer
3k views

inter VLAN routing with Ubuntu

I have 4 VLANs created and I'm trying to use my Ubuntu machine as the DNS,DHCP, and L3 router. I want my 4 VLANs separated but still able to talk each other. Here is a bit about my setup. Cable ...
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211 views

VLANs with mixed MTUs trunked over a LAG

I'm contemplating enabling Jumbo frames for a specific network/VLAN (a dedicated storage network). Ports are spread across two switches, linked together using a LAG, which is configured to carry all ...
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195 views

Small business network vlans and hyper-v configuration

We are a small business and have been successfully running one Hyper-V 2012 R2 vmhost with many Windows Server 2012 VMS that includes a DC, Web Server, CRM Server and SQL Server for a couple of years. ...
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1answer
98 views

debian networking does not restart properly

I have a Debian 8 machine, where I've configured two VLAN interfaces in /etc/network/interfaces. Now I've deconfigured it (deleted information from interfaces file), restarted networking, and now it ...
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171 views

Static route between vlans

Windows server 2003. MS TMG with two NICs. I have two vlans in my network. vlan1: 200.1.1.0/255.255.255.0 vlan2: 200.1.2.0/255.255.255.0 I have an ISA server with two NICs in vlan2. NIC1: 200.1.2....
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110 views

Configure Cisco QoS for VLAN

I have two VLANs (20 and 21) that are accessing the same resource on a switch. Clients on VLAN 20 access this resource only at schedule times, but when they do, they generate lots of traffic as they'...
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59 views

Auto Set VLAN ID Hyper-V 2012 R2 Cloud

I have a lab environment with multiple clouds configured in Hyper-V SCVMM. When a guest machine is created in the correct cloud say "Yellow" it is randomly given one of the 5 Vlans we use. If it is ...
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1answer
137 views

Configuring a private vlan for a test lab, but still access the internet

I have been looking around and trying to find ideas on how to isolate a test lab from our main network whilst still allowing the test lab access out to the internet. At the moment, our main network ...
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189 views

Router OpenVPN client connected, but remote VPN machines not visible

My goal is to connect my Asus RT-68 router to remote VPN network, so LAN computers can access remote ones. Remote OpenVPN server is run on Zentyal Linux distro. My LAN address range is 100.100.0.0/24 ...
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1answer
634 views

Manage Windows Server 2012 and trunk the Hyper-V VM (same physical NIC)

I'm trying to use Hyper-V to deploy a pfSENSE box inside of it. But, the scenario is: 3 VLANs VID: 1000 VID: 2000 VID: 3000 On a physical switch port, I've tagged the Server physical port with ...
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1answer
887 views

Best route for setting up VLAN tagging on CentOS

Lately, I have been working to configure a centos65 server to enable VLAN tagging, this server is going to act as VM Host (kvm). On the network-switch level, the ports were configured to enable ...
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1answer
507 views

Basic VLAN setup help needed, HPV1910 Switch->SonicWALL 3600

I'm struggling to get a basic VLAN working across my equipment an HP V1910 switch and a SonicWall 3600 router. Here is what I have: HP V1910 VLAN 1 - Mgmt 192.168.10.x VLAN 20 - Wireless 191.168....
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410 views

Adding multiple vlan interfaces into bridge (ovs)

I am adding multiple vlan interfaces (eth3.409, eth3.410, ...) to a bridge, furthermore I also add the eth2 interface (local network) to the bridge. eth3 is a trunk with 13 different vlans. The ...
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1k views

Using KVM with macvtap and VLANs for VM

I want to use the optimizations given for the ASAv (Page 18) which should run with KVM. I am using Ubuntu 14.04 LTS and I should configure macvtap for an higher performance. It just says the ...
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1answer
723 views

How to Connect Multiple Devices with the Same IP to a Windows PC

I'm working on a project that need to use a Windows PC/Server to control multiple identical devices through Ethernet. Obviously, those devices cannot be connected directly to the Windows PC/Server due ...
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1answer
201 views

Hyper-V VLAN with static IP

Trying to setup/simulate Hadoop cluster locally via multiple (hyper-v) VMs. I'm using hortonworks sandbox image for hyper-v which runs centos linux. I can hit the vm, if I use an internal switch and ...
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397 views

VTP trunking not working for Cisco 4948 switch

I'm adding a new Cisco 4948 switch to an existing network that has a bunch of 3500 series switches already configured and working. I've verified the VTP domain and password are identical, tried ...
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724 views

Trunk vlans inside openvz container (Proxmox)

I have a node running OpenVZ CT (ProxMox). eth1 on HN are bridged through vmbr1 to veth device on CT101 (eth1 inside container). (Host Node) eth1 -> vmbr1 <- veth101.1 <- eth1 (CT101) No VLANs,...
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2answers
206 views

Windows Server spamming devices on other subnets on port 445

I have a Windows Server 2012 that every few seconds sends packets destined for port 445 on local IPs on other subnets. The IPs on other subnets it is trying to reach are devices such as VoIP phones, ...
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456 views

VLAN configuration on HP J9279A

I've tried to set up separate VLAN for lab environment on one of my HP switches (J9279A/J9280A). Network schema: WAN | GW | ...
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1answer
981 views

Setting up VLANs using GS724T & Draytek 2860n-Plus

I am having a world of problems here and can't see what is going wrong! The Plan: Use the Draytek to connect to the internet and provide WLAN access. Single port to connect to the GS724T and tag ...
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306 views

Can pvlan-trunk Ports Carry normal vlans too on Juniper EX8208?

I'm trying to implement pvlan on Juniper EX8208 which will span across multiple switches (to a Cisco nexus 7000 Series) and need to know if the Inter-Switch-Link Port with "pvlan-trunk" will allow ...
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293 views

How does Juniper vlan.0 work with policies?

I'm trying to understand vlan.0 and Juniper policies. Referring to here: http://kb.juniper.net/InfoCenter/index?page=content&id=KB16667 According to the link above, it seems that if I use vlan.0,...
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521 views

HP 5120 vlan not working

So I have this odd issue with our HP 5120 switches. The VLANs will not pass traffic unless a interface with a IP is assigned to the VLAN. Problem is there is a limit of 8 VLAN interfaces that are ...
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55 views

network inbound from other subnets refused to server A, Server A can go outbound to internal networks, but not internet

I have a RHEL 6 server with 4 NICs on 192.168.2.[30-33]/24 Set with DHCP reservations via infoblox, I have checked and the MACs all match up. ifconfig shows /24 for every netmask, and the routing ...
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784 views

DRAYTEK - VLANs with VLAN tagging switches / router

Our company uses Draytek routers (various models, slowly upgrading to 2860n at each site). We have recently purchased a new site, and want to split the network up into separate VLANs, so as to ...
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152 views

Routing between L2 isolated ports

I am to deploy some managed switches for FTTB/FTTH and preparing configuration to introduce isolation between customers (by disabling L2 forwarding between client ports or using private VLANs). ...
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1answer
125 views

How can we better pinpoint instability issues on our network?

We have a medium-sized network of 600 users, all on Cisco switches. Where the users are allowed to plug in routers, etc. on the endpoints, so that they can use wireless and/or multiple devices in ...
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306 views

Guest wireless. HP to Cisco VLANs

I'm having trouble getting guest Internet access working. I have HP V-M200 WAPs and a Cisco RV042G for internet and a HP 1910 switch in the middle. I created a second Wireless Community/SSID on the ...
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231 views

Linux as gateway with VLANs failing for local network

We have a private VLAN being routed out from a host connected both to it and to our public network. Hosts on the private VLAN have the private IP address of the gateway host (10.2.2.82) set as their ...
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864 views

Cisco vlan entry missing in vlan.dat, but appears in running-config

One of our vlan's (ID: 104) stopped working suddenly and computers on that vlan failed when trying to obtain a dhcp ip address. On the Cisco switch if we do show vlan, this command is supposed to ...
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4k views

OpenWrt on TL-WR1043ND - VLAN to VLAN communication

I have this network configuration at home: 3G Wifi router - for access to internet, 192.168.1.0 subnet Router TP-Link TL-WR1043ND - OpenWRT (12.09), 192.168.2.0 subnet, connected wirelessly via "...
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755 views

debian KVM - network bonding fails with vlan and bridge

i have a Debian 6 system configured with 2 NICs these NICs are used on a bond (bond0) which is used by bridge that require to use VLAN. i can get connection between guests running on VLAN10 but it ...
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1answer
1k views

Ghost “vlan 0” tags added to ethernet frames in CentOS guest under OpenStack

I'm trying to debug an issue involving a KVM virtual machine instance where the instance doesn't respond to network requests when the source is on another physical machine, which is on the same subnet ...
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183 views

VLANS and Public/Private Traffic

I may reveal some ignorance with this question, but I am really confused. We have 3 static IPs and one gateway/modem with my organization. The gateway/modem is located in a remote area of our building,...
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1k views

PFSense VLAN's - clients cant access devices on a defined VLAN

I'm having an issue setting up pfSense with VLAN's, basically, the pfSense boxes can ping the devices on the tagged vlan, but clients routing through pfSense cannot. There are two Cisco SG500 ...
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1answer
573 views

How to prevent partial crash during VLAN configuration on a HP ProCurve 3500

As you can see from my question, I have a VLAN configuration problem with a ProCurve 3500. The goal is to remove a VLAN from the existing configuration, however when I use the WEB UI to do this, I ...
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1answer
789 views

Openstack - Connectivity between instances on 2 separate nodes

I have the following setup: 1 x Management Node (node A) 2 x Compute Nodes (node B & C) 1 x Volume Node (node D) Relevant configurations: VlanManager multi_host=true Node B[eth0=192.168.6....
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6k views

HP Procurve 2910AL allow traffic from VLAN to VLAN

We are trying to setup so that the switch handel routing and communication between a few vlans. And then have a link network up to the fw. Here is the config: Running configuration: ; J9145A ...