ZyXEL Communications ZyXEL ZyAIR NWA-3500 - Manual (Page 94)

Chapter 6 Wireless Configuration
ZyXEL NWA-3500 User’s Guide
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6.4.4 STP Port States
STP assigns five port states (see next table) to eliminate packet looping. A bridge port is not
allowed to go directly from blocking state to forwarding state so as to eliminate transient
loops.
6.5 DFS
When you choose 802.11a in Access Point mode, the ZyXEL Device uses DFS (Dynamic
Frequency Selection) to give you a wider choice of wireless channels.
DFS allows you to use channels in the frequency range normally reserved for radar systems.
Radar uses radio signals to detect the location of objects for military, meteorological or air
traffic control purposes. As long as your ZyXEL Device detects no radar activity on the
channel you select, you can use the channel to communicate. However, a wireless LAN
operating on the same frequency as an active radar system could disrupt the radar system.
Therefore, if the ZyXEL Device detects radar activity on the channel you select, it
automatically instructs the wireless clients to move to another channel, then resumes
communications on the new channel.
6.6 Wireless Screen Overview
The following is a list of the wireless screens you can configure on the ZyXEL Device.
1 Configure the ZyXEL Device to operate in AP, AP+Bridge, Bridge/Repeater or
MBSSID mode in the Wireless screen. You can also select an SSID Profile in the
Wireless screen.
2 Use the SSID screens to view and edit SSID profiles.
3 Use the Security screen to configure wireless profiles.
4 Use the RADIUS screen to configure RADIUS authentication and accounting settings.
5 Use the Layer-2 Isolation screen to prevent wireless clients associated with your
ZyXEL Device from communicating with other wireless clients, APs, computers or
routers in a network.
6 Use the MAC Filter screen to allow or restrict access to your wireless network based on
a client’s MAC address.
Table 21 STP Port States
PORT STATES DESCRIPTIONS
Disabled STP is disabled (default).
Blocking Only configuration and management BPDUs are received and processed.
Listening All BPDUs are received and processed.
Learning All BPDUs are received and processed. Information frames are submitted to the
learning process but not forwarded.
Forwarding All BPDUs are received and processed. All information frames are received and
forwarded.