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Cisco Aironet 350 Series Bridge Software Configuration Guide
OL-1410-07
Chapter 1 Overview
VLAN Support
• Avoiding and managing network congestion
• Prioritizing service to different kinds of network traffic
• Shaping network traffic
• Setting traffic priorities across the network
Limitations and Restrictions
The QoS implementation on the bridge has the following limitations and restrictions:
• Provides only prioritized QoS for downlink traffic on IEEE 802.11 links and does not support a
general purpose QoS signalling protocol, uniform admission control, guaranteed bandwidth, and
other features that are generally associated with parametized QoS.
• Supports rudimentary admission control mechanisms for Spectralink and Symbol VoIP phones.
• Does not provide a method for prioritizing uplink traffic on IEEE 802.11 links.
• Does not offer 802.1X authentication for Symbol VoIP phones because those phones do not support
an 802.1X type such as LEAP or EAP-TLS.
• The DTIM beacon period must be small to support jitter-sensitive streaming multicast audio and
video applications.
• Supports IEEE 802.11e EDCF-like channel access prioritization but does not support IEEE 802.11e
QoS frame formats.
Related Documents
The following documents provide more detailed information pertaining to QoS design and
configuration:
• Cisco Internetworking Technology Handbook
• Cisco IOS Quality of Service Solutions Command Reference, Version 12.2
These documents are available on Cisco.com.
VLAN Support
Version 12.01T supports VLAN technology by mapping SSIDs to VLANs. With the multiple-SSID
capability, the bridge can support up to 16 VLAN subnets.
What is a VLAN?
A switched network can be logically segmented into virtual local-area networks (VLANs), on a physical
or geographical basis, or by functions, project teams, or applications. For example, all workstations and
servers used by a particular workgroup team can be connected to the same VLAN regardless of their
physical connections to the network or the fact that they might be intermingled with devices for other
teams. Reconfiguration of VLANs can be done through software rather than physically unplugging and
moving devices or wires.