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

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12 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 ...
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0answers
18 views

OSPF with VLAN and LAN

I have two Linux based router/firewall with Quagga installed. There are three physical interface connected. firewall one eth0 - WAN - 172.10.100.2/30 eth1 - LAN - 192.168.3/24 eth2 - wifi_lan 10....
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1answer
27 views

Access shared files between two vlans using a local server

I am very new to networking. I have two VLANs, and want to read and transfer shared files between them. I cannot add a new router. I have access to a server which can be accessed by both the VLANs ...
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1answer
300 views

How to config private IPs for IPMI using VPN?

Recently I discovered it is best to protect my IPMI web interface behind a VPN. I went ahead and installed OpenVPN on my server and connect to it using tunnleblink on OSX. The VPN part is all set and ...
4
votes
1answer
3k views

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 ...
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1answer
16 views

Inter VLAN on Netgear layer 2 switches

I have a basic setup as described in the (rather poor) image above. I have various VLANS; 1 Default 10 VOIP 20 Guest WIFI (Unifi) I am looking at a way of doing Inter VLAN in this setup of layer ...
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2answers
31 views

Why do some VLAN Wireshark captures include data after the IPv4 payload?

Data Some Cloudshark captures show a "Trailer" for the vLAN and some do not. Captures With extra 4 bytes. Without extra 4 bytes. Question Why do some and not all VLAN Wireshark captures ...
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0answers
11 views

NPS with VLAN tagging not getting correct IP from DHCP

Surely I am doing something wrong here. I have setup a Wireless router to use WPA2-Enterprise and connect to a RADIUS server. I have NPS running on Windows 2008R2 Server. I have setup NPS in a way ...
0
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1answer
25 views

Two untagged VLANs on one port (ProCurve)

Goodmorning I'm setting up a new network. My problem is that i have a management VLAN 99 and an IT VLAN 89. Now i want to connect my laptop to one port and access both VLANs. Because when i'm at my ...
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1answer
75 views

Dropped packets in all Linux and Unix

I have a problem. I have a motherboard by Supermicro – X11SBA-LN4F. There are 4 ethernet ports. In the first port I connect to the internet. In the second port I connect to my local network. When, I ...
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0answers
2 views

Tomato router with separate DHCP server [migrated]

I currently have a Netgear R7000 (running Tomato) acting as my main router (DHCP and DNS) and access point. Because of how my house is laid out, the modem and router are apart from each other (...
0
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3answers
802 views

mixed private ip address and public ip address without nat?

I distribute network using vlan, at vlan.1 we already use a public ip, and to extend the services at vlan.11 we using private ip address. The machine in vlan.1 can ping device in vlan.11 vice-a-versa....
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2answers
1k 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 ...
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1answer
24 views

how should I divide a network into several smaller vlans on a extreme switch?

I get a C-network from my ISP, and there's a static route in ISP side pointing to one ipaddress(192.168.0.2) in my C-network so that this C-net can be reached from outside world. I use a Extreme X460 ...
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2answers
34 views

cisco 3850 in separate wiring closets - VSS?

I have two new 3850 24 port gig switches. I am putting one in the front wiring closet of our warehouse, the other in the rear. IS there a way to have these be a layer 2 / layer 3 Virtual Switch using ...
0
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1answer
2k views

VLAN & WiFi & DHCP with Cisco SG200

I'm trying to configure a small business network with one Cisco SG200-26, a Linux server and two TP-Link TL-WA801ND. I have set up the APs to have two different SSIDs, Public and Staff, and have ...
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1answer
2k views

Getting invalid input error on procurve 2510 when setting up ip helper-address

I have 3 HP Procurve 2510G-48 and I want to setup a VLAN for public wifi (VLAN100). Originally I just had the default vlan1. I have computers communicating across switches on VLAN100 with static IP ...
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0answers
19 views

Cannot create macvlan interface, why?

My linux (debian jessie, 4.6.0-0.bpo.1-amd64 #1 SMP Debian 4.6.1-1~bpo8+1 (2016-06-14)) boxes have a number of modems and mifis connected. I would like to split off some of the processes in the system ...
2
votes
1answer
229 views

Scan to folder across subnets/VLAN's no longer works

We have a Sharp copier scanner set up on address 172.20.20.200 and a Windows 2008 file server with network shares IP - 172.20.10.82. Up until a week ago we could scan from the copier directly to a ...
1
vote
1answer
42 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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1answer
44 views

PfSense box not passing traffic between WAN and LAN

I just tried to insert a PfSense box into my network and I seem to have broken something in the process. Need some outside help to point out any errors I might have missed. The setup was working ...
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0answers
57 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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0answers
25 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 ...
1
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1answer
114 views

interVlan routing with Ubuntu

I have 4 vlans created and I trying to use my Ubuntu machine as the DNS,DHCP, L3 router. I want my 4 vlans seperated but still able to talk. Here is a bit about my setup. Cable modem (Bridged)-->...
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0answers
44 views

Get an IP from DHCP behind a few routers

I know that there few posts for this subject (i read them all) but they don't cover my case I'm new in the company and having some beginners problems... The context: Users LAN - SW Access - SW ...
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votes
7answers
50k views

Why does a VLAN have an IP address?

A dumb question for the majority, but I am interested to know "why does a VLAN have an IP address?" Is this address different from the default gateway? Or is this address, same as broadcast address ...
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2answers
59 views

“route” sub-command does not exits in “ip” command on Cisco 2960-S

I am new to cisco. I'm running a Cisco 2960-S and defined several VLAN on it. I like to use SVI feature and set 192.168.1.254 ip address for interface VLAN 1, 192.168.2.254 for interface VLAN 2 and so ...
0
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2answers
72 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 ...
1
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0answers
37 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 ...
1
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5answers
13k 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 ...
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1answer
25 views

Basic Vlan questions

I've been "awarded" with IT infrastructure manager possition as I'm the "good with computers" guy in my small office. Nedless to say they have made a huge mistake, I have no clue.... I'd like to ask ...
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3answers
138 views

Forward traffic between VLANs with iptables

We're having the following 4 VLANs on my network, connected to an Ubuntu Linux box with DHCP. This Linux should act as the L3 router as well. VLAN 10 on interface eth1.10 with subnet 10.10.10.0/24 ...
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0answers
55 views

pfsense inter vlan slow speed

In our company we use pfsesne 2.3 as a router. Problem is with inter-vlan transfer, which is very slow about 150kbit/s in both ways. Its very strange , network is 1GB , transfers inside vlan's are god ...
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1answer
45 views

Set Internet Access for VLAN + Default Gateway + DHCP Client

I have a question that make my mind so bussy. I would appreciate if anyone guide me about this. So let me explain: Firstly consider We have bellow devices: Devices: 2 L2 Managable Swiches 1 ...
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0answers
25 views

Can't transmit from multiple virtual vlan id interfaces on same interface

I'm creating virtual interfaces of vlan id on same interface, i.e: eth0 - the main interface with ip 0.0.0.0 . eth0.1 - tagged interface under eth0 with ip 10.0.0.1 . eth0.2 - tagged interface ...
0
votes
1answer
42 views

Cisco 3750G: Tagging and untagging traffic on a port

I have the following setup: [phone]-~-~-~-(port-10)[Cisco 3750](port-24=trunk)----[servers] I want the phone to talk only on vlan (say 1940), where-as Cisco switch to untag/tag its traffic, as goes ...
1
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2answers
3k views

VLAN support on Juniper EX - 2200 switches

I have 6 Juniper switches (EX - 2200) connected to each other as shown in the network topology. I have two PC's that I am using PC1 - (used for configuring the 6 switches via minicom) PC2 - to ...
1
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0answers
48 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. ...
0
votes
1answer
35 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 ...
0
votes
1answer
50 views

Ip addressing for serial routing

I have the following packet tracer diagram: I have range of ip address : 10.0.0.0 - 10.0.255.255 I need to assign ip addresses from this range to the routers' serial interfaces as well as subnet ...
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2answers
27 views

How can I see whether tcp-offloading is enabled on a ubuntu server?

I would like to find out if my Ubuntu VM uses tcp-offloading to increase the performance of VXLAN encapsulation. Where can I find this information on my machine?
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1answer
37 views

Figuring out the most efficient use of an ip range

I am working with Packet Tracer atm and have 3 subnet plans : assigned(management(104users) staff(43 users) admin(35 users)). I have an ip address range of:38.191.0.0 and subnet mask of 255.255....
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1answer
39 views

Intervlan routing--DHCP offer from server on default VLAN not making it back to newly created vlan via layer 3 switch

Default VLAN: 10.36.0.0/24 New VLAN : 10.36.8.0/24 DHCP server : 10.36.0.17 I can see the DHCP offer packets making it back to my VLAN ip address namely 10.36.8.31 (from dhcp server message log) ...
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0answers
51 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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vote
1answer
27 views

If you switch an interface's vlan does it stop traffic?

I'm configuring a cisco catalyst switch and I want to change the vlan for the all of the ports on the switch away from the default vlan 1. I know how to change a vlan on an interface, I want to know ...
0
votes
1answer
74 views

Create vxlan - RTNETLINK answers: Operation not supported

I knew nothing of vxlan until about 30 minutes ago, however I've come up with an issue installing OpenStack, which is vxlan related. Trying to create a vxlan on an interface on Ubuntu 14.04 (kernel 3....
1
vote
1answer
57 views

Why a computer in one VLAN cannot get an IP address from a DHCP server in another VLAN?

Can anybody please explain as to why a computer in one VLAN cannot get an IP address from a DHCP server in another VLAN by default? Why is there a need for a DHCP Relay Agent or an IP helper, they all ...
4
votes
2answers
1k views

Bridging two VLANs together

I have a connection to a network service provider with two VLANs on it. One VLAN has the internet. The service provider has defined a default router and assigned me a subnet of IPs attached to that ...
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0answers
33 views

Cant get multicast to work across VLANs using pfsense router

I have a pfsense router as a VM on hyper-v, on which I have configured multiple VLANs. I have an application on VLAN1 (10.60.1.0/26) which multicasts to multiple VMs on another VLAN2(10.70.1.0/26). ...
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0answers
40 views

Cisco 3750 intrer-VLAN routing not working

I've defined three VLANs on my 3750 switch. I've also enabled the routing on it. It is a standalone switch. But the routing is not working between the VLANs. I don't know what to do. There is the ...