WESM zl Management and Configuration Guide WT.01.28 and greater

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Introduction
ProCurve Wireless Edge Services zl Module
■ HTTPS access—The module’s server certificate authenticates the module to
your Web browser.
■ RADIUS authentication services —802.1X authentication with EAP
requires mutual authentication. In other words, the module’s internal RADIUS
server must send a server certificate and authenticate to supplicants.
■ Autokey authentication for secure Network Time Protocol (NTP)—The
module sends its certificate to the secure NTP server to authenticate itself and
generate keys to secure NTP exchanges.
Because the Wireless Edge Services zl Module can store multiple trustpoints, you
can select different certificates for different functions.
Traffic Management and QoS
In the past, users often treated wireless connections as a supplement to other network
connections. Now, users demand more and more from wireless connections, increas-
ing congestion and decreasing QoS.
Compounding the problem, users have begun to demand the same applications to
which they have become accustomed on Ethernet connections. As multimedia appli-
cations become more common in wireless networks, maintaining a high QoS for such
time-sensitive, bandwidth-intensive traffic becomes a priority. Voice-over-WLAN
(VoWLAN) wireless phones further complicate the situation with yet another type of
traffic that requires special handling.
A wireless network, which uses the shared medium of radio signals, functions
differently from a switched Ethernet network. On a wireless network, collisions can
occur, bandwidth can be reduced, and latency can be high. A wireless QoS solution
must address these issues.
The Wireless Edge Services zl Module manages wireless traffic with several QoS
mechanisms, ensuring that each type of traffic receives the necessary level of service.
The module supports the following QoS protocols, which you can enable on a
WLAN-to-WLAN basis:
■ SpectraLink Voice Priority (SVP)
■ priority queuing based on WMM or on a WLAN classification
These protocols improve QoS in the wireless network. You can also configure the
module to mark traffic outbound to voice stations for high priority. Called Voice
prioritization, this feature improves the QoS for traffic destined to wireless stations,
as the traffic travels through both the Ethernet network and the wireless network.
Finally, the Wireless Edge Services zl Module can implement weighted fair queueing
(WFQ) on traffic destined from the module to RPs.