Cisco Cisco Aironet 350 Access Points Notas de publicación
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Release Notes for Cisco Aironet 340 and 350 Series Access Points and 350 Series Bridges Running Firmware Version 12.00T
OL-3346-01
New Features
What Is QoS?
QoS refers to the ability of a network to provide improved service to selected network traffic over various
underlying technologies including Ethernet and IEEE 802.11 wireless LANs. In particular, QoS features
provide improved and more predictable network service that:
underlying technologies including Ethernet and IEEE 802.11 wireless LANs. In particular, QoS features
provide improved and more predictable network service that:
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Supports dedicated bandwidth
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Improves loss characteristics
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Avoids and manages network congestion
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Shapes network traffic
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Sets traffic priorities across the network
Limitations and Restrictions
The QoS implementation on the access point has the following limitations and restrictions:
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Provides only prioritized QoS for downlink traffic on IEEE 802.11 links.
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Does not support a general-purpose QoS signalling protocol, uniform admission control, guaranteed
bandwidth, and other features that are generally associated with parametized QoS.
bandwidth, and other features that are generally associated with parametized QoS.
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Supports rudimentary admission control mechanisms for Cisco and Symbol VoIP phones.
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Does not provide a method for prioritizing uplink traffic on IEEE 802.11 links.
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Requires a small DTIM beacon period to support jitter-sensitive streaming multicast audio and video
applications.
applications.
•
Supports IEEE 802.11e EDCF-like channel access prioritization but does not support IEEE 802.11e
QoS frame formats.
QoS frame formats.
Centralized Administrator Authentication
This feature allows the use of an AAA server to authenticate clients if the user manager functionality is
enabled on the access point. At the end of a successful login, the AAA server verifies the user login and
passes back the appropriate privileges for the user or an administrator. The following points are pertinent
to this feature:
enabled on the access point. At the end of a successful login, the AAA server verifies the user login and
passes back the appropriate privileges for the user or an administrator. The following points are pertinent
to this feature:
•
The access point can use either RADIUS or TACACS for user authentication.
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The access point tries to authenticate to the user locally first. If the user is not found locally, the
access point authenticates to the remote AAA server.
access point authenticates to the remote AAA server.
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By default, the access point is configured to perform only local administrative authentication.
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User privileges are Write, SNMP, Ident, Firmware, and Admin. They are locally cached on the
access point. A time-out timer flushes the information every 5 minutes.
access point. A time-out timer flushes the information every 5 minutes.
•
Authentication server configuration:
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RADIUS protocol: send request on port 1812 or 1615
TACACS protocol: send request on port 49