I am looking at installing WLAN to one of our outbuildings at work. I will be putting the transmitter/receiver on building roofs but due to traffic passing the link may lose line-of-sight for short durations (5-10 seconds).
Wireless technologies 802.11a and 802.11b don't require line-of-sight to transmit and receive data. I have wireless running in my home. Access unit is upstairs in a brick structure and I can connect downstairs outside of the brick structure (and anywhere else in my home). I have been very pleased but am still learning about the technology. Hope that helps, Justin
I concur. Over large distances, there's something called a Fresnel Zone where the radio will sorta bend and not require line of sight -- so if a truck goes by you may never lose a packet. But even if you do lose a few packets, the 802.11 protocol will rettransmit up to 16 times by default (and this is configurable), and the higher layers (e.g., TCP) also may have retrainsmit timers.
The vehicles passing by are made of metal. They will create reflected signals. You either need to get the antennas higher (plan on about $100 each for mounts that take a vertical pipe), or you need to go to circular polarized antennas.
Circular polarization helps overcome interference created by reflection of the original signal. I can explain why and help you find antennas.
Or, put the stuff in, try it and see if anyone complains.
Transferring Crash file from standby:
Login to the Active WLC in HA.
(Cisco Controller) >transfer upload datatype crash
(Cisco Controller) >transfer upload filename <Desired filename>
(Cisco Controller) >transfer up...
This is the start of a display filter cross reference between Wireshark and OmniPeek.
The 1st installment is a table of advanced filters. More filters will be added as time allows.
It is a living doc, so check back for changes every so often
Please feel ...
I have created a Powershell script to automatically add a Wireless Guest User on Cisco WLCs. (tested on 2500 Series)
The script should be completely self explanatory.
Powershell SNMP Module (Install-Module -Name SNMP)
SNMP Write Access to...