Allied Telesis AT-WR4500 manual Wireless Interfaces, Troubleshooting

AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers	33
RouterOS v3 Configuration and User Guide

full-duplex(yes no) - whether transmission of data occurs in two directions simultaneously rate (10 Mbps 100 Mbps 1 Gbps) - the actual data rate of the connection

status (link-ok no-link unknown) - status of the interface, one of the: link-ok- the card is connected to the network

no-link- the card is not connected to the network (cable is not plugged in or faulty) unknown - the connection is not recognized (if the card does not report connection status)

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See the IP Addresses and ARP section of the manual for information how to add IP addresses to the interfaces.

Example

[admin@AT-WR4562] interface ethernet> monitor ether1,ether2 status: link-ok link-ok

auto-negotiation: done done rate: 100Mbps 100Mbps

default-cable-setting: standard standard

4.2.4 Troubleshooting

Description

Interface monitor shows wrong information

In some very rare cases it is possible that the device driver does not show correct information, but it does not affect the NIC's performance (of course, if your card is not broken)

4.3Wireless Interfaces

4.3.1General Information

Summary

This manual discusses management of the Atheros chipset based wireless interfaces of the AT-WR4500 Series wireless routers that comply with IEEE 802.11 set of standards. These interfaces use radio waves as a physical signal carrier and are capable of data transmission with speeds up to 108 Mbps (in 5GHz turbo-mode).

RouterOS can operate wireless interfaces as wireless clients (station mode), wireless bridges (bridge mode), wireless access points (ap-bridgemode), and for antenna positioning (alignment-onlymode). RouterOS provides a complete support for IEEE 802.11a, 802.11b and 802.11g wireless networking standards. There are several additional features implemented for the wireless networking in RouterOS - WPA (Wi-Fi Protected Access), WEP (Wired Equivalent Privacy), software and hardware AES encryption, WDS (Wireless Distribution System), DFS (Dynamic Frequency Selection), Alignment mode (for positioning antennas and monitoring wireless signal), VAP (Virtual Access Point), ability to disable packet forwarding among clients, Nstreme wireless transmission protocol and others.

The Nstreme protocol is proprietary (i.e., incompatible with other vendors) wireless protocol aimed to improve point-to-point and point-to-multipoint wireless links. Advanced version of Nstreme, called Nstreme2 works with a pair of wireless interfaces (Atheros AR5210 and newer MAC chips only) - one for transmitting data and one for receiving.

Benefits of Nstreme protocol:

•Client polling. Polling reduces media access times, because the card does not need to ensure the air is "free" each time it needs to transmit data (the polling mechanism takes care of it)

•Very low protocol overhead per frame allowing super-high data rates