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

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1answer
50 views

Changing from router DHCP to Server DHCP [closed]

I want to setup a Linux DHCP server instead of a router based DHCP. I'm guessing that I will need to turn off the router DHCP, but keep the router as the gateway. I think that the BCAST DHCP requests ...
1
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2answers
473 views

Setting up VOIP system on separate VLAN / Server on default VLAN

First off, I am not a network engineer so apologies if I get terminology messed up, i realize accuracy is important here. Currently, we have a small(ish) network with around 40 devices and 20 IP ...
1
vote
1answer
218 views

What determines which of a DHCP Relay Agent's IP addresses are attached to relayed requests?

I have a vlan with multiple IPs set, and a helper-address: vlan 15 ip helper-address 172.17.1.11 ip address 172.17.5.254 255.255.255.0 ip address 172.17.51.254 255.255.254.0 All relayed requests ...
5
votes
1answer
12k views

VLAN tags not shown in packet capture (Linux) via tcpdump

I am adding a tagged VLAN onto eth0: #ip link add link eth0 name eth0.20 type vlan id 20 This results in: #ip link 2: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc ...
1
vote
1answer
80 views

Name resolving issue

I have a problem with my VoIP server name not resolving by voip.companyname.com If I try to ping it from windows 7/w2k8 the request is not coming back unless I type FQDN which would by ...
2
votes
1answer
4k views

Multiple, different VLAN trunks to KVM guests (Linux)

I've hit a roadblock of sorts with an architectural challenge. I've got a server running KVM - which will feature a number of guests, some running virtualised firewalls and others, just plain web ...
1
vote
2answers
337 views

Portfast on a trunk port on a Cisco 3750

Good morning everyone! Some history, we have mixed environment of Dell Powerconnect 6248 switches and Cisco 3750 switches and a Cisco 6500 core for our Head office. We have two VLANs 1 & 20 ...
1
vote
1answer
757 views

how to configure static ipv6 and additional ipv6 with same vlan?

I'm having trouble with configuration static ipv6 address and additonal ipv6 on same interface(eth4). static ipv6 configuraiton issue firstly, I configure below vi /etc/network/interfaces auto ...
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0answers
30 views

How do you create virtual NIC's with VLAN in windows server like Linux? [duplicate]

Under Ubuntu Linux I can create a VLAN like this: /etc/network/interfaces auto vlan10 iface vlan10 inet static address 10.1.10.10 network 10.1.10.0 netmask 255.255.255.0 vlan_raw_device ...
1
vote
1answer
83 views

Host not showing in ARP even after broadcast

serverfault community. What I would like: to determine the current IP of a host (a networked camera to be specific) What I have: its MAC, its previously documented hostname and IP What I have ...
5
votes
1answer
743 views

Designing segmented LAN with fairly shared hi-speed internet access on a tight budget

With another member of the owners' association, I've been tasked with designing and setting up shared, hi-speed, internet access, for our apartment building. We have very little budget and hope to be ...
0
votes
1answer
375 views

is it possible to use ms loop back adapter to setup local vlan

Is it possible to use Microsoft Loop back adapter to set up Lan connection between two computer which is logically isolated from the main network? 1st computer: has a regular ip stack 192.168.1.x ...
2
votes
2answers
2k views

VMware ESX: Unable to delete PortGroup. 1 active ports

At work we have an ESX 4.1 cluster with some vlan's (Port Groups) configured on a vswitch on each host. A lot of these port groups aren't in use anymore so we decided to clean them up. We don't have ...
4
votes
2answers
798 views

VMware vSwitch and double tagging (QinQ)

I'm experiencing an issue while trying to pass double tagged through a vSwitch. A physical interface on the VMWare host machine is receiving double tagged traffic - the outer tag differentiates ...
2
votes
1answer
599 views

SR-IOV on KVM hosted guest using tagged vlans

I have read a few posts here on NOT using tagged vlans in KVM because of the emulated e1000 drivers, but I have a situation where I need to use tagged vlans. Because of this we used SR-IOV enabled ...
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votes
3answers
139 views

Cisco switch inter-vlan access

I have Cisco Catalyst 2960-s switch and I want to configure three Vlans (A; B; C) I want to : Allow traffic between A and B Allow traffic between A and C Block traffic between C and B or if ...
1
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0answers
127 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 ...
0
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1answer
2k 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 #------------- ...
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votes
1answer
98 views

How can i configure different multiple vlan with dhcp server with a single ip subnetting [closed]

Hello every one out there!! I got a issue i would like to share with you, expecting to have it sorted out. I want o set up vlans on my network, in order to separat same department,which can be about ...
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votes
1answer
155 views

VLAN routing setup with VPN on Cisco ASAs

We currently have two ASA5515-X firewalls, what we want to do is dedicate one of them to providing AnyConnect VPN and two site to site VPNs only, with the second ASA handling firewall ACLs for ...
0
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1answer
79 views

Provide Internet To Two Networks One Connection

Currently we have one network set to 192.168.1.x and is set via DHCP providing internet to all machines on that network. Recently we've began development on programmable logic controllers that are ...
5
votes
1answer
559 views

Tag/Untag VLANs from Port Perspective on HP Switch

I'm familiar with vlans and tagging, and we usually use the command line interface for our HP Layer 3 switches. I've done quite a few: vlan 10 untagged 21 I've always wondered if this was possible ...
0
votes
3answers
165 views

make web portal visible on two different vlans on same interface

We have recently set up a new Aterisk pbx server based on our previous pbx (also Asterisk) which was installed by an external company. We've kept the configuration of the server the same, all we did ...
1
vote
1answer
241 views

HP N40L / Intel 82574L VLAN Leakage

This is a follow on from a previous question (Switch sending DHCP packets to wrong VLAN) but the problem turns out that it's not with the switch, but more so in the NIC hardware I believe. Basically, ...
3
votes
1answer
826 views

Domain Based Port Forwarding with VLAN routing [closed]

At my new workspace I want to setup a network that enables me to deploy my web development work on Dev, Test and Accept servers (VMs) with (controlled) access from outside the network - based on ...
2
votes
1answer
1k views

D-link DAP-2590 VLAN configuration

So we have been fighting this issue for well over a year. It's been so long that I am having to relearn the configuration today. Here's the situation. We're running several D-Link DAP-2590's with ...
3
votes
3answers
2k views

VLANs using one managed switch or link router to unmanaged switches?

I'm the resident IT guy in an office with about 20 workers, amongst 3 separate companies who sublet an office. We are wired with 24 ethernet ports dotted around the offices that all lead to a patch ...
2
votes
1answer
389 views

Same VRRP group, multiple VLAN

Let's say a gateway has traffic between vlan 11 and 22: Gateway 1 -- FastEthernet 0/1.1 -- vlan 11 -- 192.168.11.1 Gateway 1 -- FastEthernet 0/2.2 -- vlan 22 -- 192.168.22.1 Gateway 2 -- ...
0
votes
2answers
638 views

Sharing internet to Private WAN routing

I'm trying to help out with sharing internet over a private WAN installed between two sites, unfortunately the routers are controlled by a company that won't respond to support requests, but they have ...
2
votes
1answer
1k views

Multiple VLANs in the same subnet

Is it possible to have multiple VLANs in the same subnet, with the same gateway address (TMG)? I want to avoid having many Subnets (and vNIC's in TMG) just to isolate sets of a few hosts. IP: ...
0
votes
3answers
716 views

Ruckus wireless AP and Dell PowerConnect configuration problems

We are working on trying to get some Ruckus Access Points to work correctly on our network. Currently our network is as follows: VLAN 10 - Servers VLAN 11 – Computers/DHCP VLAN 12 – Voice VLAN 13 – ...
0
votes
1answer
289 views

VMWare Workstation and network isolation

When I install VNC or some other RAT to a container in my VMWare Workstation machine box, what ways can I prevent access to my local network and other machines on my network. Is this where setting up ...
11
votes
2answers
1k views

Encryption over gigabit carrier ethernet

I would like to encrypt traffic between two data centres. Communication between the sites is provided as a standard provider bridge (s-vlan/802.1ad), so that our local vlan tags (c-vlan/802.1q) are ...
0
votes
1answer
57 views

Offloading backups to secondary network

I'm trying to solve a problem- Currently, we are constantly backing up and have no budget for additional servers. Our production network is still a 10/100 and handles voip, SQL plus our backup ...
5
votes
1answer
2k views

Send trunk directly to vm in HyperV 2012

I'm setting up OpenBSD as a VM in HyperV 2012. It would be easier for me to just create one interface on the vm and have OpenBSD take care of setting up the vlans. Is it possible to tell HyperV to ...
1
vote
0answers
365 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 ...
3
votes
1answer
171 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 ...
1
vote
1answer
321 views

Access ESXi via the exclusive network management interface for an IPMI board

I would like to know if it's possible to access the ESXi configuration through vSphere using an dedicated network interface for IPMI connection with the motherboard. We have some Supermicro boards, ...
-1
votes
1answer
84 views

Filter incoming span feed to a single vlan

I have a span feed coming in on an un-addressed interface of a linux (centos) box. eth4. The span contains several vlans. I have an application which can grab packets from an interface ...
1
vote
1answer
7k views

Setting Up VLANS between a Dell PowerConnect 2824 and 2716

Goals: - Have two Dell switches trunked together with 1 cat5 cable. - Have VLANs of the same number/name passing traffic from switch to switch. - Not allowing any traffic from one VLAN to pass to a ...
0
votes
1answer
708 views

VLAN and Active Directory: complementary or substitute? [closed]

I recently encountered a network design that heavily implements VLANs but does not make use of a dedicated identity and access management system such as Active Directory or OpenLDAP. And yet another ...
0
votes
2answers
4k views

Difference between trunk and tagged port

I am reading some wikipedia articles and RFC 5517, studying VLANs, and I don't recognize the difference between a trunk port and a tagged port. From what the material I am reading says, a tagged ...
-1
votes
2answers
361 views

NIC teaming and vlan support in linux

Doeas anyone has idea about vlan support in linux with NIC teaming/bonding.In case of a switch I am not able to communicate however if I remove multiple vlan interfaces from NIC , I am able to ...
1
vote
3answers
2k 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 ...
0
votes
1answer
852 views

DHCP server with multiple scopes is issuing the wrong IPs to VLANs

We're restructuring our network, and configured our router/dhcp server as follows: # public internet connection auto eth0 iface eth0 inet static address 192.168.10.10 netmask 255.255.0.0 ...
0
votes
1answer
86 views

Best option for having ethernet (level2) switch simulated on typical ethernet level3 switch/router?

I have two Linux servers which are going to be connected to typical l3 switch/router. They will both have assigned one public IP number per each ( let's say: pub.ip.n.1 and pub.ip.n.2) by IT. Q1: ...
2
votes
1answer
335 views

In what scenarios is untagAll (access) VLAN port mode useful?

On my Avaya ERS2550T switch each port can be set with a native/primary VLAN I can assign other secondary (depending on the mode) VLANs that will be associated with this port. I can configure ports ...
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votes
1answer
53 views

vlans communicate with each other

I am setting up three vlans in a cisco router with the following configurations. Vlan 10 Subnet: 192.168.1.0/24 Netmask: 255.255.255.0 Gateway: 192.168.1.1 Vlan 20 Subnet: 192.168.2.0/24 Netmask: ...
1
vote
1answer
1k views

Hyper-V/SCVMM 2012 VLAN ID's not working

I am having issues getting multiple VLAN's set up on my Hyper-V cluster. Here is the scenario; I need to have 2 separate (potentially more in the future) VLAN's to span across the Hyper-V ...
-1
votes
2answers
239 views

how to receive MAC multicast packets based on VLAN interface?

can any one pls help me in the following question. Background : Two PC's(PC1 n PC2) with two VLAN interfaces in each (eth0.2 and eth0.3) respectively.The PC's are connected by WRT54GL router in ...