Информационное Руководство для Cisco Cisco 2000 Series Wireless LAN Controller
Q. Do the wireless cards support a peer−to−peer network configuration?
A. Cards function in a peer−to−peer network when you use either of these modes:
Ad Hoc modeUse the Cisco Aironet Client Utility to configure the adapter to
network Ad Hoc. At power up, the card sends a probe that looks for another card with
which to associate. If the card does not hear any other cards, the card becomes a
primary card. Each additional card that hears the primary associates in a peer−to−peer
mode. If a client is out of range of the primary at initial startup, the client also
becomes a primary. Neither communicates with the other until restart of one of the
cards.
network Ad Hoc. At power up, the card sends a probe that looks for another card with
which to associate. If the card does not hear any other cards, the card becomes a
primary card. Each additional card that hears the primary associates in a peer−to−peer
mode. If a client is out of range of the primary at initial startup, the client also
becomes a primary. Neither communicates with the other until restart of one of the
cards.
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Infrastructure mode (default)With the use of an access point (AP) as the traffic
cop, all cards communicate to the AP or series of APs. The cards then communicate
with each other with the use of standard peer sharing, such as Network Basic
Input/Output System (NetBIOS) Extended User Interface (NetBEUI). The cards can
also communicate through a server.
cop, all cards communicate to the AP or series of APs. The cards then communicate
with each other with the use of standard peer sharing, such as Network Basic
Input/Output System (NetBIOS) Extended User Interface (NetBEUI). The cards can
also communicate through a server.
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Q. At what point do clients jump the client association from one access
point (AP) to another nearby AP?
point (AP) to another nearby AP?
A. The client associates with a new AP with all of these conditions in place:
The signal strength of the new AP is at least 50 percent.
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The percentage of time that the transmitter is active is within 20 percent of the
present AP.
present AP.
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The number of users on the new AP is four fewer than the number on the present AP.
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However, if one of these conditions is true, the client does not change, regardless of how
many users associate:
many users associate:
If the signal strength is not at least 50 percent
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If the time that the transmitter is in use is more than 20 percent greater than the
present AP
present AP
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Q. What can you do if your PC Memory Card International Association
(PCMCIA) or PCI card crashes, locks, or hangs your PC? What can you
do if the PC does not recognize the card, or the card does not associate
with the access point (AP)?
(PCMCIA) or PCI card crashes, locks, or hangs your PC? What can you
do if the PC does not recognize the card, or the card does not associate
with the access point (AP)?
A. Install updated drivers. The installation often resolves these problems.
Q. What is the Cisco Compatible Extensions program for wireless LAN
(WLAN) Client Devices?
(WLAN) Client Devices?
A. The Cisco Compatible Extensions program ensures the widespread availability of client
devices that are interoperable with a Cisco WLAN infrastructure and take advantage of Cisco
innovations for enhanced security, mobility, quality of service, and network management.
Cisco Compatible client devices are sold and supported by their manufacturers, not Cisco.
Refer to Cisco Compatible Client Devices for more information on Cisco Compatible
products.
devices that are interoperable with a Cisco WLAN infrastructure and take advantage of Cisco
innovations for enhanced security, mobility, quality of service, and network management.
Cisco Compatible client devices are sold and supported by their manufacturers, not Cisco.
Refer to Cisco Compatible Client Devices for more information on Cisco Compatible
products.