Cisco Cisco Aironet 1200 Access Point Notas de publicación
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Introduction
OL-2588-01
Introduction
Introduction
Cisco Aironet Access Points are wireless LAN transceivers that can act as the connection point between
wireless and wired networks or as the center point of a stand-alone wireless network. In large
installations, the roaming functionality provided by multiple access points allows wireless users to move
freely throughout the facility while maintaining uninterrupted access to the network. The 1200 series
access point allows you to add a 5-GHz radio module for dual-radio operation, and the internal radio is
accessible and can be upgraded as new radios become available.
wireless and wired networks or as the center point of a stand-alone wireless network. In large
installations, the roaming functionality provided by multiple access points allows wireless users to move
freely throughout the facility while maintaining uninterrupted access to the network. The 1200 series
access point allows you to add a 5-GHz radio module for dual-radio operation, and the internal radio is
accessible and can be upgraded as new radios become available.
The access point uses a browser-based management system. The system settings are contained on web
pages in the access point's firmware. You use your internet browser, a command-line interface, or SNMP
commands to adjust access point settings.
pages in the access point's firmware. You use your internet browser, a command-line interface, or SNMP
commands to adjust access point settings.
When you install firmware version 11.41T on your access points, you can:
•
Associate up to 50 Cisco Aironet Workgroup Bridges to an access point.
•
Combine MAC-Based, EAP, and 802.11 Open Authentication.
•
Use SNMP commands to manage firmware and configuration files.
•
Include a unique identifier in access point DHCP request packets.
New Features
Firmware version 11.41T includes these new software features:
•
Ability to associate up to 50 workgroup bridges to an access point.
With firmware version 11.41T, you can select no for the new Classify Workgroup Bridges as
Network Infrastructure setting to allow up to 50 workgroup bridges to associate to the access point.
The default setting, yes, limits the number of workgroup bridges that can associate to the access
point to an absolute limit of 27 and to a practical limit of around 20.
Network Infrastructure setting to allow up to 50 workgroup bridges to associate to the access point.
The default setting, yes, limits the number of workgroup bridges that can associate to the access
point to an absolute limit of 27 and to a practical limit of around 20.
Note
When you select no for the Classify Workgroup Bridges as Network Infrastructure
setting, you must reboot workgroup bridges associated to the access point.
setting, you must reboot workgroup bridges associated to the access point.
Access points normally treat workgroup bridges not as client devices but as infrastructure devices,
like access points and bridges. Treating a workgroup bridge as an infrastructure device means that
the access point reliably delivers multicast packets, including Address Resolution Protocol (ARP)
packets, to the workgroup bridge.
like access points and bridges. Treating a workgroup bridge as an infrastructure device means that
the access point reliably delivers multicast packets, including Address Resolution Protocol (ARP)
packets, to the workgroup bridge.
The performance cost of reliable multicast delivery—duplication of each multicast packet sent to
each workgroup bridge—limits the number of infrastructure devices, including workgroup bridges,
that can associate to the access point. To increase beyond 27 the number of workgroup bridges that
can associate to the access point, the access point must reduce the delivery reliability of multicast
packets to workgroup bridges. With reduced reliability, the access point cannot confirm whether
multicast packets reach the intended workgroup bridge, so workgroup bridges at the edge of the
access point’s coverage area might lose IP connectivity. When you treat workgroup bridges as client
devices, you increase performance but reduce reliability.
each workgroup bridge—limits the number of infrastructure devices, including workgroup bridges,
that can associate to the access point. To increase beyond 27 the number of workgroup bridges that
can associate to the access point, the access point must reduce the delivery reliability of multicast
packets to workgroup bridges. With reduced reliability, the access point cannot confirm whether
multicast packets reach the intended workgroup bridge, so workgroup bridges at the edge of the
access point’s coverage area might lose IP connectivity. When you treat workgroup bridges as client
devices, you increase performance but reduce reliability.
Refer to the
“Classify Workgroup Bridges as Network Infrastructure” section on page 3-35
in the
Cisco Aironet 1200 Series Access Point Software Configuration Guide for more information on this
feature.
feature.