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

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21 views

Adding VLAN removes earlier virtual IPs in CentOS 6.X [Solved]

I added some virtual IPs to my eth0 interface in CentOS 6.5, ip addr add 192.168.100.2 dev eth0 I then simply added a VLAN on eth0. vconfig eth0 10 The VLAN was created but it removes any of my ...
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0answers
16 views

2 Vlans on a Cisco PIX 515 with DMZ

I have to install an application server on a networks dmz. The application will sit on a network but has no interaction with the other devices on that network. I was thinking that the firewall(Cisco ...
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0answers
10 views

Dell Powerconnect 6200 management access via general mode ports?

I have a Dell PowerConnect 6248/6224P stack with several VLANs, and am trying to set up VLAN routing. I have one port dedicated to my management VLAN (99), but I would like to access it from another ...
0
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0answers
23 views

Open vSwitch double VLAN tagging is ignored

I'm trying to add a flow to a KVM machine using Open vSwitch 1.10.2 for it's networking, which double tag all traffic comming from one of the virtual machine's ports. I'm using the following command ...
0
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3answers
856 views

KVM 802.1q (tagged VLAN setup)

I've done a lot of reading about VLAN tagging in KVM bridged networks, but am getting very confused as to what needs to be tagged (the physical network devices, or the bridges attached to those ...
3
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2answers
125 views

Can I set vlan ip to anything?

I'm new to vlans, but I'm thinking to set one up. I'm wondering if I can assign the vlan any network address I want (ex. can I make it say 3.1.0.0/16 if I wanted to?). The reason I'd like to do this ...
1
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1answer
27 views

Setting Up VLAN on Dell Switches

I need to create a vlan on a dell switch. I'm brand new to vlans, and have a few simple questions. I have the MAC addresses for devices that are plugged into the switch, how can I figure out which ...
2
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2answers
870 views

VmwareESXi Vlans, Cisco devices and broadcast making the things odd

I'm having problem for some days trying to make a correct configuration Right now I have a Cisco Catalyst switch, a Cisco Router 2811 and a VMware ESXi node with 4-8 VM (Linux,BSD, Windows), each ...
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1answer
75 views

Switch crazyness

I have a couple of switches here which gives me a headache. Sometimes it works, sometimes it doesn't the whole thing makes no sense. So I linking 2 vlan capable switches together on a regular access ...
3
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1answer
26 views

VLAN configuration in linux not showing tags in tcpdump

i bonded 2 NIC and specified VLAN tag of 11 cat /etc/sysconfig/network-scripts/ifcfg-bond0.11 DEVICE=bond0.11 ONBOOT=yes VLAN=yes NM_CONTROLLED=no STP=no HOTPLUG=no also ifconfig bond0.11 ...
1
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3answers
70 views

VLAN based interfaces for virtual machines

I am in the process of designing an experiment in which we have multiple VLANs arriving at a single NIC, with each VLAN being associated to a single VM. The straightforward way to do this would be ...
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2answers
766 views

XenServer 6.0.2 and Cisco 3550 vlan configuration

I am running a couple of xenserver 6.0.2 hosts with multiple vm's on them. All the xen hosts have 4 physical network ports connecting to the cisco. Each port is untagged in xen but is tagged to a vlan ...
2
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1answer
3k views

How do I setup routing for two companies with different Internet connections on the same LAN?

Here's the setup: Two companies (A & B) share office space and a LAN. A 2nd ISP is brought in and company A wants its own Internet connection (ISP A) and company B wants its own Internet ...
0
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1answer
35 views

Trunk port needs to be tagged or untagged?

I linking 2 different brand of switches (Linksys & Zyxel) through SPF gigabit connector. g4 1G-Combo-F Full 1000 Enabled Off Up Disabled Off It says the link is up but ...
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0answers
30 views

Untangle running on ESXi sending tagged VLAN to Cisco switch not working

basically here is my setup: [Host A] = A hypervisor running ESXi 5.0 [Switch A] = A Cisco 2960-S Series 48 port switch [Switch B] = A Cisco 2960-S Series 48 port switch [P-Router] = *A physical ...
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1answer
25 views

On which interface do I see the VLAN Tag packet

I am accessing two virtual machines running on CentOS. I have added one vlan on each machine: On Machine 1- 10.11.20.22 vconfig add eth1 2 ifconfig eth1.2 192.168.0.81 netmask 255.255.255.0 ...
0
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1answer
36 views

IM across VLANs

My workplace (a public library) employs two VLANs to service public machines and staff machines separately. The help desk techs are requesting an IM system such that a patron at a machine hooked into ...
1
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4answers
92 views

Can one server see traffic to another server inside a VLAN?

Scenario: I have a rack of servers that all belong to the same private VLAN. I transfer data from Server 1 to Server 2. Is it possible for any of the other servers to sniff out the data sent or is ...
1
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1answer
84 views

Trouble configuring standard VLANs on BNT G8264 and ESXi 5.5

I have a BNT (now an IBM) RackSwitch G8264 and am having problems trying to get standard VLANs configured and working with my two ESXi 5.5 hosts. I've followed the documentation (which can be found ...
1
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1answer
44 views

Private VLANs/Port Isolation on HP ProCurve 2524

I am trying to set up Private VLANs (as described on Wikipedia) on a HP ProCurve 2524, but I can't find any references to it in the online manual. Searching the internet hasn't yielded much either ...
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0answers
39 views

freebsd reducing network bandwidth after some uptime

I have a couple of machines running FreeBSD 10 that are experiencing the same problem. After some time, the network throughput falls to 10 Mbps and it stays there until the machine is rebooted. ...
0
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1answer
635 views

Cisco Catalyst 3750 connected to Cisco ASA 5505 and dropping packets

(Cross posted from Super User per suggestion there) At the office, I have inherited a network that I am still trying to fully comprehend. I have a problem today with a new connection between: A ...
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2answers
84 views

VLAN Tagging Traffic on Cisco Switch

I have a situation where I'm setting up multiple VLANS on a pfSense firewall on the same physical interface for a client. So in pfSense, I now have VLAN 100 (employees) and VLAN 200 (students - ...
2
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1answer
42 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 ...
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1answer
83 views

Voice VLAN Configuration on Cisco SG300

We currently have a single Cisco SG300 switch on our data network. We are introducing a hosted VoIP system. As such we will be installing a second Cisco SG300 (to account for growth and new phones) ...
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0answers
11 views

Is it possible to access multiple (trunked) vlans from A port programmed correctly?

What if we wanted to combine Mac security on a port, and allow that port access to all vlans on a Cisco switch? I know Mac spoofing would be a concern here, I work on an industrial network with ...
0
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1answer
799 views

Unable to access VLAN host from VLAN interface in CentOS

I am playing with VLAN (Virtual LAN) configuration on CentOS 6.4. I have 2 interfaces, eth0 and eth1. I have configured 2 VLAN interfaces eth0.20 and eth0.30 as #file: ifcfg-eth0.20 #------------- ...
4
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3answers
9k views

Set 802.1Q tagged port on VLAN1 on Dell PowerConnect switch

I'm having big troubles when adding this Dell switch to my network. Here we use several VLANs to segment traffic. All switches (3com and DLink mostly) have configured the same VLANs, most ports are ...
0
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0answers
33 views

cannot access the Internet from VLAN Setup on a netgear switch

I am trying to setup VLANs on netgear switch FS728TS with firmware version V3.0.0.30 I have created one VLAN number 10, and ports 23 and 24 have been "Untagged", under the port PVID configuration, I ...
3
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3answers
473 views

What do switches do to tagged and untagged VLAN packets?

Let's say we have a 4-port switch that is VLAN capable. 1 2 3 4 Port 1 is TAGGED to VLAN10` and `UNTAGGED to Default_VLAN(1) Port 2 is UNTAGGED to VLAN10 Port 3 is UNTAGGED to ...
2
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1answer
36 views

Tagged Packets on native VLAN General Port

Scenario a) I have a Switchport (g1) in General-Mode. Say g1 is member of VLAN1 (native, untagged) and VLAN2 (tagged). Another Port (g2) is in Trunk-Mode, and member of VLAN1 and VLAN2 If i send a ...
0
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0answers
84 views

pfSense NAT routing using VLANs

We already have pfSense installed and it is working for our single IP address on 1.1.1.1. We also have a further 3 ip addresses (1.1.1.2, 1.1.1.3, 1.1.1.4) which are set up as VLANs on the WAN ...
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1answer
43 views

VLAN IP assigning [closed]

In an Esxi 5.0 server, we have a standard switch created with an ip range of 172.25.17.32-172.25.17.63 with subnet mask of 27. I have created some virtual machines in that host. Now I need to map ...
2
votes
2answers
106 views

Is it possible to configure a private VLAN on a switch and still access each server via a public IP?

I'm sure this is a very basic/common networking problem. I have 1 web server and 2 database servers that are co-located in a data-center. I have been issued 10 public IP addresses and I have a 10 port ...
0
votes
1answer
39 views

802.1q Trunk Ports to Server - Drawbacks?

So I know that I can configure my switch to trunk a port and tag/untag packets from my Windows and UNIX servers using functionality provided by the NIC. My question is, what are all the downsides of ...
0
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0answers
44 views

Communicate between Voice and Data VLAN

I have a network of computers, on which I also have an Avaya IP Office phone system with several IP phones. Currently the IP phones are on their own IP subnet range, but I want to create a separate ...
1
vote
1answer
368 views

Hyper-v 2012 R2 Nic Teaming with VLAN's

Currently have a 3 node 2012r2 cluster. Everything is working fine without any issues with networking / VLANS / etc... The issue that I am having is needing to define the VLAN at the Guest VM ...
0
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2answers
2k views

arp -n responds with (incomplete) on the wrong subnet, can't remove it

context There are 2 servers: server1 - eth0 10.129.76.16 eth0.2 192.168.0.103 server2 - eth0 10.129.79.1 eth0.2 192.168.62.101 The 192.x.x.x addresses are connected to the ...
3
votes
4answers
269 views

Arbitrary VLAN interface name

Is there a way to name a VLAN interface arbitrarily like eth72 or ext19 instead of the four standard nameing schemes eth0.72, vlan19 (and the padded variations)? Don't have no clue. Perhaps udev?
0
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1answer
47 views

Cisco switch VLANing based on MAC address

Is it possible (or advisable) to tell a Cisco switch to VLAN based on MAC address? If so, how? I know it can be done on a port-by-port basis, but I'd like more granularity than that. We're using ...
0
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3answers
81 views

Can I create VLANs when there are subnets already?

I need to have separate subnets in each room but at the same time, I need a few computers (spread across rooms in different subnets) to be in a single VLAN. Is it possible or do I need to rework the ...
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votes
3answers
71 views

VLAN subset of LAN? [closed]

I'm reading up on VLAN and came across this "VLAN's allow a network manager to logically segment a LAN into different broadcast domains" If I'm understanding this correctly VLAN is always less than ...
0
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0answers
34 views

OpenVPN advanced privileged client access customization

I have implemented an OpenVPN server running on Tomato router (Let's call the router TR) the OpenVPN server is using TUN interface which means connections between clients and servers are based on ...
0
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1answer
48 views

Netgear GS108T v2 switch - packets exit wrong port

I have an eight port Netgear GS108Tv2 between my firewalls and their gateways. One switch serves my two firewall and the two ADSL and SDSL routers. One of the firewalls (pfSense) pings its gateway ...
1
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1answer
102 views

how can I present a network diagram on the building that has 3 floors

How can I present a network diagram on the building that has 3 floors? The requirements are to separate the users in one LAN according to their department, what confuses me is on the second and on the ...
1
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3answers
750 views

What do I do with the default VLAN 1 on a 3Com 4210?

I am a bit confused as to how to use the default VLAN on a 3Com 4210. The switch is configured out of the box with all ports on a default VLAN 1. I need 4 VLANs on this switch: 100 - Internal WIFI ...
2
votes
1answer
710 views

How to add vlan without vconfig command? [closed]

Is there any way how to create vlan interface without using vconfig ? I have only KVM console and trunk port connected to the machine, so I cannot use apt as I do not have internet access. I defined ...
0
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1answer
90 views

Linux Bridges - Tags on interface vs. on bridge

What is the difference between tagging on the bridge vs a physical interface then adding that tagged interface onto the bridge? I'm assuming if I want two total VLANs segmenting network traffic to ...
2
votes
1answer
141 views

Persistent Network Configuration using KVM and libvirt

Our environment will have a KVM host setup dynamically using kickstart (easy enough). The hard part is dealing with network configuration and keeping VLAN configuration (and possibly bridge/host ...
0
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1answer
41 views

Emulate VMware vswitch on KVM [duplicate]

I'm wondering how I would go about emulating how a standard vswitch works in KVM. In VMware you have the following: vmnic -> vswitch(tagged) -> port group (untagged) So all traffic going to the ...