D-Link Layer2+ Unified Wired/Wireless Gigabit Switch DWS-4026 User Manual
Product codes
DWS-4026
01
The DWS-4026 is D-Link’s next generation L2+
Unified Wired/Wireless Gigabit Switch with an array
of advanced features and 802.11n support. With the
ability to manage up to 64 DWL-8600AP wireless
access points by itself and up to 256 DWL-8600APs
in a Switch Cluster, the DWS-4026 is a full-featured
and cost-effective mobility solution for mid-to-
large enterprises and service providers. Extremely
versatile and flexible, the DWS-4026 can be deployed
as a Wireless Controller in the core network or as
a L2+ PoE Gigabit Switch at the edge depending
on the customer’s requirement. By centralizing
WLAN configuration and management functions,
DWS-4026 enables network administrators to have
control, security, redundancy, and reliability needed
to scale and manage their wireless networks easily
and efficiently.
Adaptable Wireless
Most of the current Wireless LAN controllers’
architecture requires wireless traffic to return to
the controller for centralized processing, causing
unnecessary traffic delay. The DWS-4026 offers
network administrators additional options: depending
on the wireless application, wireless traffic can
either be tunneled back to the switch for better
security control, or locally forwarded at the access
point for optimal performance. This device offers
administrators maximized flexibility with options
to tunnel client traffic to the switch for centralized
security control, and forward VoIP traffic directly
from the access point for optimal performance.
Comprehensive Wired/Wireless Security
The DWS-4026 offers a state-of-the-art Wireless
Intrusion Detection System (WIDS), which empowers
network administrators to detect Rogue Access Points
and Rogue Clients as well as anticipate wireless
threats, preventing them from causing damage to the
network. With WIDS, administrators can activate
various threat detections and use RF scans to sweep
the entire wireless network for any possible security
breach in advance. Other wireless security features
include WPA/WPA2 Enterprise, 802.11i, Captive Portal
and MAC Authentication.
On the wired side, the DWS-4026 utilizes Dynamic
ARP Inspection (DAI) and DHCP Snooping to ensure
maximum security. Together, DAI and DHCP Snooping
will prevent even the most sophisticated attacks such
as man-in-the-middle and ARP poisoning. Along
with other advanced security features such as
802.1X Access Control, Denial-of-Service Protection,
Broadcast Storm Control and Protected Port, the
DWS-4026 provides robust and centralized security,
ensuring maximum network reliability.
Seamless Mobility
Wireless clients can enjoy seamless and uninterrupted
roaming from AP to AP managed by a DWS-4026
even if they are not in the same subnet. Because
the DWS-4026 employs various mechanisms such as
pre-authentication and key-caching, wireless users
can freely “roam” the entire network without needing
to re-authenticate. The additional Fast Roaming
feature results in disruption-free, reliable wireless
connectivity crucial for mobile applications such as
Wi-Fi IP Phones and wireless PDAs. Furthermore, the
DWS-4026 supports advanced “AP-AP Tunneling,”
which is used to support L3 roaming for wireless
clients without forwarding any data traffic to the
Unified Switch. This can help to significantly reduce
network traffic and save bandwidth.
Voice-Optimized Quality of Service (QoS)
The DWS-4026 is specifically designed and optimized
for Voice over Wireless traffic with features such as
Auto-VoIP and Voice VLAN. The Auto-VoIP feature
explicitly matches VoIP streams and provides them
with a better class-of-service than ordinary traffic.
These VoIP streams include the popular call-control
protocols such as SIP, H.323 and SCCP. Voice VLAN
enables the switch ports to carry voice traffic with
defined priority, ensuring that the sound quality of an
IP phone will be safeguarded from deteriorating when
data traffic on the port is high. The DWS-4026’s Voice
QoS capability enables administrators to maintain
the integrity and priority of the most time-sensitive
traffic.
In addition, the DWS-4026 supports traffic shaping,
which helps to smooth out temporary traffic bursts
over time so that the transmitted traffic rate is
bounded. Other advanced QoS features include
per-flow bandwidth control, minimum bandwidth
guarantee and 802.1p CoS all help to keep the network
traffic in a predictable manner.
Network Resiliency
The DWS-4026 offers a “self-healing” network
capability to increase the resiliency of the entire
wireless network. To make up for a sudden RF
signal vacuum created by any “dead” AP (AP with
DC power failure, for example), the DWS-4026
automatically increases the transmit output power
of the neighboring APs to expand the RF coverage,
thereby “healing” the network. Also, to ensure
continuous connection for current clients, the DWS-
4026 performs load balancing across access points
when network traffic reaches a certain threshold
by forcing additional clients to associate with other
access points. Through self-healing network and AP
load lancing, the DWS-4026 can effectively manage
the wireless bandwidth, optimize WLAN traffic and
ensure maximum RF coverage.
Scalable Unified Wired / Wireless
Network Architecture
Network Architecture
Manages up to 64 wireless APs per
Switch, up to 256 APs per Cluster
Adaptable Wireless technology
Complete Wireless and Wired
features
Robust Wired/Wireless Security
Wireless Intrusion Detection System
(WIDS)
Rogue AP Detection & Classification
Captive Portal
64/128/152-Bit WEP Data Encryption
802.11i WPA2/RSN
MAC Authentication
Dynamic ARP Inspection (DAI)
DHCP Snooping
Access Control List (ACL)
802.1X
Comprehensive QoS
Auto-Voice over IP
Voice VLAN
802.1p & DiffServ
Per-Flow Bandwidth Control
Per-Port Traffic Shaping
Minimum Bandwidth Guarantee
Supports WMM & SVP
Seamless Mobility
L2/L3 Fast Roaming
AP-AP Tunnel
Intra-Switch & Inter-Switch Roaming
Advanced Switching & Routing
RIP v1/v2
VLAN Routing
VRRP
Spanning Tree Protocol (STP)
IGMP / MLD Snooping
Subnet-based VLAN
.
Simplified Management
Switch Cluster
Web Access Using HTTP
Telnet Server/Client
SSH v2, SSL v3
SNMP v1, v2c, v3
sFlow
Dual Image support
DWS-4026
L2+ Unified Wired/Wireless Gigabit Switch