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Questions tagged [vlan]

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

VLAN, short for virtual local area network or virtual LAN, is where a group of hosts sharing the same set of requirements are connected to each other as if they were on the same broadcast domain regardless of their actual physical location.

See also

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Putting Android on ethernet network using VLAN s

In our lab, we have static IPs assigned to everything. We have less than 20 devices, some physical and some virtual on ESXi, ranging from servers to android tablets. Everything is wired ethernet. There are 3 VLANs on the switch. Our virtual linux…
Xenophod
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identifying vlan packets using tcpdump

I'm trying to figure out the vlan tagged packets that my host receives or sends to other hosts. I tried tcpdump -i eth1 vlan 0x0070 But it didnt work. Has anyone tried to view the vlan packets through tcpdump before? Couldn't find much help…
madCode
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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 able to do this, with the hardware already at…
abstrask
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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: 10.0.0.1 (TMG server) VLAN:1 ~ 3 IP:…
A.J.
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Best Approach for subnetting/VLANing traffic?

Our network is currently setup with no subnets or VLANs. We are looking at going to VoIP so this needs to change before VoIP is installed. I believe that we want to use VLANs to separate Voice and Data, am I correct on saying that? Also, I would…
Trevor
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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?
Michuelnik
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DHCP server for multilple VLANs

Possible Duplicate: Can I have multiple DHCP servers on one network? This is a very old question i guess.In this forum itself it has been answered in Multiple VLANs, multiple subnets, single DHCP server?.That is done on using the Helper options…
nachi
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linux vlan routing

I've got this network topology: network 192.168.100.0/24 vlan 100 network 192.168.200.0/24 vlan 200 one ubuntu server(2 vlans on 1 ether) eth0.100 (ip:192.168.100.10/24) eth0.200 (ip: 192.168.200.20/24 def gw 192.168.200.254) Situation is…
MealstroM
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DHCP Server with multiple scopes. Which one does it use to handout an IP?

I have 4 DHCP Scopes. 10.200.0.0 <--------DHCP Server Lives Here 10.54.0.0 10.16.0.0 10.32.0.0 A DHCP broadcast request is sent to my DHCP server. How does it decide which scope to pull an address from? My problem is that a client that should be…
Ruisu
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Is there a good way to programmatically configure VLANs on a managed switch?

My situation is that my company makes a product that (currently) requires the user to set up a dozen or so VLANs on a managed switch that is dedicated to the exclusive use with our product. Currently, the way it works is this: The user enters his…
Jeremy Friesner
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Management Network Best Practices

I am looking at setting up a Management vlan, on which I will put all the Management interfaces for my various networkable devices (Firewall Mgmt Interfaces, Server RAC, WAP Mgmt Interfaces, etc). What are best practices when it comes to accessing…
Josh Brower
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When to use routers and when to use layer 3 switches

If you were to connect two buildings on the same site via fiber, what is best to use - routers or layer 3 switches? The layer two switches in each building have VLAN's, so these will either connect to a router or layer 3 switch, and then the router…
The_Bear
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Multiple VLAN's - Multiple SSID or Single SSID and Multiple VLAN's (radius)

I have a question regarding best practice. I have a case where i need multiple VLAN's in wireless networks. What is more performant? Having multiple SSID and each of them have a VLAN (this also mean that they will be on the same chanell on that…
George Farcas
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Transparent firewall with nftables and VLANs

I want to ask you for best practice advice in transparent firewall build. I have 2 segments of network and CentOS serv with 2 10G interfaces. I want to filter/monitor/limit/drop traffic between segments. Traffic is tagged. Should I untagg traffic…
Severgun
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Setting spanning tree link "priorities" in Cisco switches

I've got a pair of C2960G-48 switches (running IOS 12.2(46)SE, if it makes a difference) with redundant trunks in place. On these switches there are a bunch of VLANs that carry quite heavy traffic at times (enough to completely saturate the trunks…
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