RLX2-IHx Series ♦ 802.11a, b, g, n
Configuring a Radio - Detailed Configuration
Industrial Hotspots
User Manual
ProSoft Technology, Inc.
Page 101 of 248
Parameter
Description
MFP Enabled
Check this box to enable 802.11w Management Frame Protection in the RLX2-
IHx. MFP when enabled, requires that management frames received over a
wireless connection must be encrypted. Management frames received from a
Parent or child node that are not encrypted are discarded, preventing denial of
service attacks.
When MFP is enabled the RLX2-IHx will always encrypt management frames
that it sends to an Associated peer/client. Both ends of a wireless link must
have MFP enabled before MFP will be used on that link.
If the peer/client does not have MFP active (as indicated in Beacons and
Associate Request elements) then the RLX2-IHx will not use MFP on that link,
even if this control is checked.
Note:
This control is automatically disabled if the Security Mode configured on
the Basic Settings tab does not include WPA2.
Arp Proxy
In industrial wireless networks, it is important to minimize external disturbances
which can cause packet latencies to soar. This can be anything from
interference generated from other equipment, to another wireless network using
the same channel or even internally generated broadcast bursts which when
transmitted simultaneously from multiple overlapping Masters can cause severe
latency spikes.
The latter can sometimes unintentionally be caused by a controller looking for a
list of remote devices, producing a burst of ARP Request frames. The ARP
Proxy feature when enabled, will intercept these ARP Requests and prevent
them from flooding the wireless network. The RLX2 is continually learning and
adding the MAC and IP Addresses of devices to its address tables and if the IP
Address being requested by the ARP Request is known, the ARP Proxy
function will send an ARP Response for the IP Address back to the Requestor.
The ARP Proxy feature should not be enabled if it is known that remote devices
do not send unsolicited IP frames after power up. If the device remains silent
until it is polled for example then the RLX2s will not learn its IP/MAC Address
and any ARP Requests for this device will not reach it.
In wireless network topologies where Repeaters always connect directly to
Masters, the ARP Proxy feature only needs to be enabled on the Masters. If the
topology consists of a multi-hop Repeatered network then enabling the ARP
Proxy feature on the Repeaters will also prevent ARP Request floods down-tree
from the Repeater.
EIP Object
Disable
Check this box to disable the Ethernet I/P agent in the radio. When checked
queries to read the EIP Object classes are ignored.