
AirWorks AWK-3131A
References
A-3
5.
Fast Recovery: In addition to maintaining a redundant wireless network, another key is providing
uninterrupted communication even when a failure occurs. AeroLink protection is designed to restore
commutation from all failures with 300 ms.
A member of the AeroLink Protection group can take one of the following seven states:
•
Initiation State (Init): Initiates the AeroLink Protection Protocol
•
Discovering State (Discover): Discovers other AeroLink Protection members for further negotiation
•
Idle State (Idle): Internal protocol checkpoint
•
Negotiation State (Nego): Negotiates with other AeroLink Protection members and elects an Active
node.
•
Backup State (Backup): After negotiation, this node is assigned as a Backup node. All traffic will go
through the Active node instead.
NOTE
When a node is in Backup state, the STATE LED will be blinking.
•
Active State (Active): After negotiation, this node is assigned as Active node, which means that all
traffic will go through this node.
•
Role Change State (Change): If the Active node is no longer capable of data transmission via the
WLAN, it will turn into Change State to trigger the re-negotiation of the Active node from the Backup
nodes.
The AeroLink Protection function can adopt one of the following three detection methods:
•
SNR: States the Signal-Noise Ratio (SNR) of the associated client.
•
Signal Strength: States the Signal Strength of the associated client
•
Disconnection
Beacon
A beacon is a packet broadcast by the AP to keep the network synchronized. A beacon includes the wireless
LAN service area, the AP address, the Broadcast destination address, a time stamp, Delivery Traffic
Indicator Maps (DTIM), and the Traffic Indicator Message (TIM). Beacon Interval indicates the frequency
interval of AP.
DTIM
Delivery Traffic Indication Map (DTIM) is contained in beacon frames. It is used to indicate that broadcast
and multicast frames buffered by the AP will be delivered shortly. Lower settings result in more efficient
networking, while preventing your PC from dropping into power-saving sleep mode. Higher settings allow
your PC to enter sleep mode, thus saving power.
Fragment
A lower setting means smaller packets, which will create more packets for each transmission. If you have
decreased this value and experience high packet error rates, you can increase it again, but it will likely
decrease overall network performance. Only minor modifications of this value are recommended.