© 2009 Extreme Networks, Inc. All rights reser ved. Summit WM20 WLAN Controller—Page 3
Extreme Networks Data Sheet
Scalability for Future Proofing
Cost-Effective Distributed
Enterprise Support
Branch Office Mode capability enables one
or more standard Altitude APs to be
installed in remote sites and across the
WAN without a local controller. These APs
download their configuration from the
central Summit WM controller and then
operate independently at the local site.
This provides a number of advantages, the
first being capital cost savings. There is no
need for a controller at every remote site.
There are also operational savings since an
administrator can manage all the Branch
Office APs from a central controller.
Thirdly, the Branch Office Mode used at
remote and branch office locations enables
the remote AP to bridge traffic to a local
VLAN at the remote site, rather than
tunneling it all back across a slow WAN
link. This provides better performance to
the branch office user, offloading the
central controller and also reducing
bandwidth demands on the WAN link.
Finally, Branch Office Mode provides
survivability—users at the branch can
continue to operate, even if the WAN is
intermittent or fails. With such scalable
architecture, enterprises can deploy
wireless in hundreds and even thousands
of branch offices. Figure 2 shows Branch
Office Mode deployment.
Summit WM system supports Wireless
Distribution System (WDS) that enables
wireless bridging and backhaul for deploy-
ment of untethered outdoor APs.
Investment Protection for
Emerging Technologies
Summit WM20 offers the broadest range of
AP support in its class. It can be economically
deployed at a branch office of a large
enterprise or at an SME with scalability to
support up to 32 APs without having to fork
lift upgrade the controller. Summit WM20 is
“802.11n Ready” which is the emerging high
speed WLAN radio technology.
Extended Mobility Domain
The Mobility Domain, which is a powerful
Summit WM architectural capability,
defines a domain within which users can
roam and enable seamless session mobility.
Mobility Domain is a cluster of Summit WM
controllers and attached APs that share a
distributed database for client, RF and
security key management. This enables
session mobility with fast handoffs for
wireless users and devices across Layer 2
and Layer 3 networks. Up to 12 controllers
can be configured into a single roaming
domain, enabling up to tens of thousands of
users to transparently roam across up to
Summit WM20 offers scalability in capacity and performance and helps protect user investment against early obsolescence.
2,400 APs. This allows an enterprise
customer to confidently deploy a secure
and robust wireless network across a large
multi-building and multi-site campus.
BlackDiamond
10808
Summit X450e-24p
PoE Switch
Wireless
Data
Local
Server
Summit WM
Voice Priority
Processor
IP Wireless
Telephones
Wireless
Data
Summit X450e-24p
PoE Switch
IP Wireless
Telephones
Wireless
Data
Altitude
350
Telephony
Server
Bridged Data
Tunneled Data
Tunneled Data
VLAN 2
VLAN 1
Media Servers
and Gateway
WAN
Branch OfficeHeadquarters
Figure 2: Branch Office Mode Deployment
(432 paginas)
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