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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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Configuring Sonicwall to route VLAN traffic to internet

I have a Sonicwall NSA 2400 that had its configuration reset and I'm having trouble reconfiguring it. The Sonicwall's WAN port (X1) connects to the internet. Its LAN port (X0) connects to a 3Com 4500G switch (Layer 3 enabled) which I connected…
losttime
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Vlan Tagging at Access Port in Switch

I'm Confused from the fact that Vlan tagging is done at access port and trunk port always gets tagged packets (until its case of native vlan).But I still believe in other fact which says tagging happen only when a frame hit the trunk port which…
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Allied Telesis router: IP filtering for the LOCAL interface

Given an Allied Telesis router with an AlliedWare OS (2.9.1) I would like to disable access to all management services of the router except for a number of subnets (or alternatively have what is a "management VLAN" with other manufacturers' switch…
the-wabbit
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understanding vlan

I have few questions regarding the functioning of VLANs: 1) Do end hosts (e.g my laptop) would ever see a VLAN ID when it is connected to a trunked or Access port ? 2) As a follow-up to 1, in the normal VLAN setup do endhosts tag the packet or is…
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For VLANs: difference between untagged and non-member setting for ports?

The "default" VLAN is VLAN 1, and traffic over ports are Untagged by default (at least, in the switches that we use). We've created VLAN 2 and marked the necessary ports as Tagged, and it's working beautifully. However, all of the ports that I did…
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Multiple virtual VLAN interfaces on single NIC (Debian)

I'm trying to setup multiple virtual interfaces with VLAN's on a single NIC. I'm running Debian Squeeze. Currently this is my /etc/netowrk/interfaces auto eth0.10 iface eth0.10 inet dhcp This gives me a working connection, however I'm not sure…
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LAN segregation for security reasons using VLAN

I was asked to segregate the testing environment in our network to improve our security. Our structure includes: 1 switch Dell Power Connect 3448 1 switch Dell Power Connect 2748 A few 5 ports Star Tech switches (work around to expand our cabling…
Fabio Ribeiro
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What happens when an untagged frame is sent to a multiple untagged VLANs port?

I am totally new to the concept of VLAN and just read about it today. So sorry if my question sounds stupid. Let's say I set up port g2 on a 10-port Cisco switch as a general port (thus can be part of multiple tagged/untagged VLANs). Furthermore, g2…
Thanh DK
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Netgear smart switch: don't understand VLAN

I'm having some difficulty getting my head around the VLAN settings in a NetGear Smart Switch (GS724TS). Can anyone help me? My understanding is: All incoming packets effectively have a VLAN number which is determined from a tag attached by another…
Bob Sammers
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Best way to break up a large subnet

I have ran into a 10.10.50.0/20 network that is having issues with packets dropping. They run all unmanaged switches and I imagine the huge amount of devices on one subnet is causing issues. I've looked at breaking the network down into separate…
Jason
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LAN and WAN at the same cable?

Can I connect LAN and Internet using the same cable? LAN computers ------\ Ubuntu server ------Switch ADSL Router --------/ I want to make LAN computers 192.168.0.2-50, server will have real IP 192.168.0.1 and some "virtual" IP 192.168.1.2.…
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Why we need VLAN in any network?

What is the use or purpose of a VLAN in networking? Can anyone point out a scenario where VLAN is useful?
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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 router for me to use. The other VLAN is a…
David Mackintosh
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Is there a better way to do bonded vlan tagged interfaces with XEN

We have a number of XEN servers all running CentOS or RHEL. The VM's that they run are all required to be on their own VLAN for no other reason than the customer expects them to be. Long story short however, I can't change this right now. We are…
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VLAN ACLs and when to go Layer 3

I want to: a) segment several departments into VLANs with the hopes of restricting access between them completely (Sales never needs to talk to Support's workstations or printers and vice-versa) or b) certain IP addresses and TCP/UDP ports across…
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