Cisco SD2008T-NA Configuration Manual page 56

Overview of Ports and Interfaces
Cisco 4402 controllers have two gigabit Ethernet distribution system ports, each of which is capable
•
of managing up to 48 access points. However, Cisco recommend no more than 25 access points per
port due to bandwidth constraints. The 4402-25 and 4402-50 models allow a total of 25 or 50 access
points to join the controller.
Cisco 4404 controllers have four gigabit Ethernet distribution system ports, each of which is capable
•
of managing up to 48 access points. However, Cisco recommend no more than 25 access points per
port due to bandwidth constraints. The 4404-25, 4404-50, and 4404-100 models allow a total of 25,
50, or 100 access points, respectively, to join the controller.
Note
• The Cisco Catalyst 6500 Series Switch Wireless Services Module (WiSM) has eight internal gigabit
Ethernet distribution system ports (ports 1 through 8) that connect the switch and the integrated
controller. These internal ports are located on the switch backplane and are not visible on the front
panel. Through these ports, the controller can support up to 300 access points.
The Controller Network Module within the Cisco 28/37/38xx Series Integrated Services Router has
•
one Fast Ethernet distribution system port that connects the router and the integrated controller. This
port is located on the router backplane and is not visible on the front panel. Through this port, the
controller can support up to six access points.
• The Catalyst 3750G Integrated Wireless LAN Controller Switch has two internal gigabit Ethernet
distribution system ports (ports 27 and 28) that connect the switch and the integrated controller.
These internal ports are located on the switch backplane and are not visible on the front panel. Each
port is capable of managing up to 48 access points. However, Cisco recommends no more than 25
access points per port due to bandwidth constraints. The -S25 and -S50 models allow a total of 25
or 50 access points to join the controller.
Refer to the
Note
page 3-36
points.
Each distribution system port is, by default, an 802.1Q VLAN trunk port. The VLAN trunking
characteristics of the port are not configurable.
Note Some controllers support link aggregation (LAG), which bundles all of the controller's distribution
system ports into a single 802.3ad port channel. Cisco 4400 series controllers support LAG in software
release 3.2 and higher, and LAG is enabled automatically on the Cisco WiSM controllers. Refer to the
"Enabling Link Aggregation" section on page 3-29
The controller's gigabit Ethernet ports can be configured for fiber-optic or wire Ethernet cables and
require gigabit Ethernet ports on the switch. They cannot operate with fast ethernet switch ports.
Cisco Wireless LAN Controller Configuration Guide
3-4
The gigabit Ethernet ports on the 4402 and 4404 controllers accept these SX/LC/T small
form-factor plug-in (SFP) modules:
- 1000BASE-SX SFP modules, which provide a 1000-Mbps wired connection to a network
through an 850nM (SX) fiber-optic link using an LC physical connector
- 1000BASE-LX SFP modules, which provide a 1000-Mbps wired connection to a network
through a 1300nM (LX/LH) fiber-optic link using an LC physical connector
- 1000BASE-T SFP modules, which provide a 1000-Mbps wired connection to a network
through a copper link using an RJ-45 physical connector
"Configuring a 4400 Series Controller to Support More Than 48 Access Points" section on
if you want to configure your Cisco 4400 series controller to support more than 48 access
Chapter 3 Configuring Ports and Interfaces
for more information.
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