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

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2answers
123 views

Adding VLAN removes earlier virtual IPs in CentOS 6.X

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 ...
0
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0answers
497 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 ...
3
votes
2answers
145 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
357 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 ...
3
votes
1answer
588 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 ...
0
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1answer
154 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 ...
1
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3answers
143 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 ...
0
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1answer
563 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 ...
0
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0answers
229 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 ...
-1
votes
1answer
106 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
53 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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1answer
2k 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 ...
2
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4answers
268 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
vote
1answer
2k 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 ...
0
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2answers
1k 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
337 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 ...
0
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1answer
1k 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) ...
2
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1answer
189 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
732 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 ...
-1
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1answer
93 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
659 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
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1answer
117 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
212 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 ...
0
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2answers
631 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
121 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
91 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 ...
1
vote
1answer
411 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 ...
0
votes
1answer
181 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
vote
1answer
4k 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
votes
1answer
310 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
3answers
553 views

DHCP Relay vs Multi-Homed DHCP Server

I'm sketching out a new network topology and I'm unsure of how to solve the issue of DHCP between two VLANs. 10.50.2.0/23 will hold the majority of our users, corporate wifi, printers etc. ...
0
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1answer
118 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 ...
2
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1answer
401 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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2answers
202 views

Why would a traffic flow be on a VLAN in one direction, but not the other?

I've seen PCAPS recently from three separate companies networks where two devices are configured to transmit traffic to each other over UDP, where one side sends a VLAN header on each packet, and the ...
0
votes
1answer
137 views

Vlan between Pfsense and Proxim hotspots

We want to plugin some hotspots to an existing network. Because we will account the hotspot traffic, it is important to route all traffic from the hotspots to the hotspot router. I tried to do the ...
0
votes
1answer
1k views

DHCP For Voice And Data VLANs With Router-on-a-Stick

Background: I have 2 Powerconnect 62xx switches stacked with a Watchguard XTM-26 between them and the outside world. Currently all devices connected to the switch are in the same vlan and the ...
2
votes
1answer
298 views

Hyper-V 12r2 across 2 physical networks

Ok, so first off... I have done this multiple times with VMware and had zero problems so I assume I am missing something in Hyper-V. Hardware I am working with: Single Dell R510 Host Onboard Dual ...
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votes
1answer
145 views

Is there a way to emulate a DHCP server (overlay network) [closed]

I have created an overlay Level 2 network using VLAN tags with Open vSwitch. I want a Level 3 one so I need to give each VM a consistent IP address. I'd like every host on this VLAN to get an IP ...
1
vote
2answers
496 views

Cisco IOS: Prevent Inter-VLAN IPv6 Network Solicitation messages

I have a Cisco 3825 router that (among other things) functions as a gateway to the internet. I have two VLANS, but only one of them should have access to the internet. VLAN10: network = ...
0
votes
1answer
354 views

cascading load on connected Alcatel-Lucent OmniSwitch units via VLANs

We are having an intermittent issue with a campus of Alcatel-Lucent Omniswitch switches, ranging from model 6000 to 6850. We are having a problem tracking down the root cause of our issue. The seems ...
0
votes
1answer
113 views

different Native vlans on the ends of trunk link

http://www.techexams.net/forums/ccnp/53867-different-native-vlans-ends-trunk-link.html so i read this, but i still can not get traffic between two ends of a trunk link, each with a different native ...
0
votes
2answers
100 views

Questions regarding my network plan

I'm developing an IT infrastructure room for testing purposes. The overall aim is to create a network, which if fully disconnected from the productive environment and several people can come and ...
2
votes
2answers
2k views

Inter-VLAN routing: multiple VLANs, only one should be accessible to all. Makes sense?

I am trying to segment our company's network. My main goal is to have many small broadcast domains instead of a gigantic one, so I thought of assigning one VLAN per department. However, we have many ...
0
votes
1answer
3k views

How to get 192.168.3.2 to successfully ping 192.168.2.3

With the layout described below, the following is true: either router can ping any host on either subnet 192.168.2.0/25 hosts can ping (and ssh to) 192.168.3.0/24 hosts but 192.168.3.0/24 hosts ...
1
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1answer
623 views

Scanning tagged traffic over bridge through iptables

I am working on bridge on linux box using brctl. Now I have to scan and monitor bridge traffic through iptables. So for the same I changed: net.bridge.bridge-nf-call-iptables = 0 to ...
6
votes
3answers
13k 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 ...
0
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2answers
8k views

How to set up 2 separate VLANs on one switch (HP v1910-48G switch)

I need some advice on how to set up 2 VLANs (on one switch, I have HP v1910-48G switch) that separate broadcast domain and also share a single internet connection. The two Vlans must remain separate, ...
1
vote
1answer
50 views

VLAN, possible to do this?

I have a Cisco RV110W small buisiness router. Here is a demo of what the administration interface/options: https://www.cisco.com/web/sbtg/gui_mockups/RV110W/default.asp.htm I have 3 devices connected ...
2
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0answers
82 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 ...
0
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1answer
412 views

Creating VLANs between network namespaces [closed]

I want to implement the topology shown in the figure below using network namespaces (ns1 to ns4). ...