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Cisco Wireless LAN Solution Product Guide
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Chapter 3 Solutions
Configuring a Firewall for Cisco WCS
b. On the <IP address> > Controller Commands page, under Administrative Commands, select Save
Config to Flash and click GO to save the changed configuration to the Cisco Wireless LAN
Controller. Click OK to continue.
c. On the <IP address> > Controller Commands page, under Administrative Commands, select Reboot
and click GO to reboot the Cisco Wireless LAN Controller. Then click OK to confirm the save and
reboot.
Step 4 After the Cisco Wireless LAN Controller has rebooted, verify that the LWAPP Transport Mode is now
Layer 2:
a. Select CONFIGURE/Controllers to navigate to the All Controllers page, and select the Cisco
Wireless LAN Controller by IP address to have Cisco WCS display the <IP address> > Controller
General page.
b. On the <IP address> > Controller General page, select System/Networking to display the <IP
address> > Networking Setups page.
c. On the <IP address> > Networking Setups page, verify that the LWAPP Transport Mode is set to
Layer 2.
You have completed the LWAPP Transport Mode conversion from Layer 3 to Layer 2. The Operating
System software now controls all communications between controllers and lightweight access points on
the same subnet.
Configuring a Firewall for Cisco WCS
When a Cisco WCS Server and a Cisco WCS User Interface are on different sides of a firewall, they
cannot communicate unless the following ports on the firewall are opened to two-way traffic:
• 80 (TCP)
• 1299 (TCP)
• 4000 (TCP)
• 5009 (TCP)
• 5010 (TCP)
• 6789 (RMI)
Open these ports to configure your firewall to allow communications between a Cisco WCS Server and
a Cisco WCS User Interface.
Refer to the Cisco WCS Software Release Notes for any other ports that need to be opened for a Cisco
WCS Server-to-Cisco WCS User Interface communications.
Configuring the System for SpectraLink NetLink Telephones
For best integration with the Cisco Wireless LAN Solution, SpectraLink NetLink Telephones require an
extra Operating System configuration step: enable long preambles. The radio preamble (sometimes
called a header) is a section of data at the head of a packet that contains information that wireless devices
need when sending and receiving packets. Short preambles improve throughput performance, so they are
enabled by default. However, some wireless devices, such as SpectraLink NetLink phones, require long
preambles.
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