Allied Telesis AT-WR4500 manual Vlan Interfaces, Vlan Setup

AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers	75
RouterOS v3 Configuration and User Guide

4.4VLAN Interfaces

4.4.1General Information

Summary

VLAN is an implementation of the 802.1Q VLAN protocol for RouterOS. It allows you to have multiple Virtual LANs on a single ethernet or wireless interface, giving the ability to segregate LANs efficiently. It supports up to 4095 vlan interfaces, each with a unique VLAN ID, per ethernet device.

A VLAN is a logical grouping that allows end users to communicate as if they were physically connected to a single isolated LAN, independent of the physical configuration of the network. VLAN support adds a new dimension of security and cost savings permitting the sharing of a physical network while logically maintaining separation among unrelated users.

Specifications

Packages required: system

License required: Level1 (limited to 1 vlan) , Level3

Submenu level: /interface vlan

Standards and Technologies: VLAN (IEEE 802.1Q)

Hardware usage: Not significant

RelatedTopics

•IP Addresses and ARP

Description

VLANs are simply a way of grouping a set of switch ports together so that they form a logical network, separate from any other such group. It may also be understood as breaking one physical switch into several independent parts. Within a single switch this is straightforward local configuration. When the VLAN extends over more than one switch, the inter-switch links have to become trunks, on which packets are tagged to indicate which VLAN they belong to.

You can use RouterOS to mark these packets as well as to accept and route marked ones.

As VLAN works on OSI Layer 2, it can be used just as any other network interface without any restrictions. VLAN successfully passes through regular Ethernet bridges.

You can also transport VLANs over wireless links and put multiple VLAN interfaces on a single wireless interface. Note that as VLAN is not a full tunnel protocol (i.e., it does not have additional fields to transport MAC addresses of sender and recipient), the same limitation applies to bridging over VLAN as to bridging plain wireless interfaces. In other words, while wireless clients may participate in VLANs put on wireless interfaces, it is not possible to have VLAN put on a wireless interface in station mode bridged with any other interface.

Additional resources

http://www.ieee802.org/1/pages/802.1Q.html

http://en.wikipedia.org/wiki/IEEE_802.1Q

4.4.2 VLAN Setup

Submenu level: /interface vlan

Property Description

arp (disabled enabled proxy-arp reply-only; default: enabled) - Address Resolution Protocol mode disabled - the interface will not use ARP protocol

enabled - the interface will fully use ARP protocol proxy-arp- the interface will be an ARP proxy