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Cisco Wireless LAN Controller Configuration Guide
OL-17037-01
Chapter 5 Configuring Security Solutions
Configuring the System for SpectraLink NetLink Telephones
Note
If you do not already have an active CLI session to the controller, Cisco recommends that you
start a CLI session to reboot the controller and watch the reboot process. A CLI session is also
useful because the GUI loses its connection when the controller reboots.
Step 5
Click
Commands
>
Reboot
>
Reboot > Save and Reboot
to reboot the controller. Click
OK
in response
to this prompt:
Configuration will be saved and the controller will be rebooted. Click ok to confirm.
The controller reboots.
Step 6
Log back into the controller GUI to verify that the controller is properly configured.
Step 7
Click
Wireless
>
802.11b/g/n
>
Network
to open the 802.11b/g Global Parameters page. If the
Short
Preamble
check box is unchecked, the controller is optimized for SpectraLink NetLink phones.
Using the CLI to Enable Long Preambles
Use this procedure to use the CLI to enable long preambles to optimize the operation of SpectraLink
NetLink phones on your wireless LAN.
Step 1
Log into the controller CLI.
Step 2
Enter
show 802.11b
and check the Short preamble mandatory parameter. If the parameter indicates that
short preambles are enabled, continue with this procedure. This example shows that short preambles are
enabled:
Short Preamble mandatory....................... Enabled
However, if the parameter shows that short preambles are disabled (which means that long preambles
are enabled), the controller is already optimized for SpectraLink NetLink phones and you do not need
to continue this procedure. This example shows that short preambles are disabled:
Short Preamble mandatory....................... Disabled
Step 3
Enter
config 802.11b disable network
to disable the 802.11b/g network. (You cannot enable long
preambles on the 802.11a network.)
Step 4
Enter
config 802.11b preamble long
to enable long preambles.
Step 5
Enter
config 802.11b enable network
to re-enable the 802.11b/g network.
Step 6
Enter
reset system
to reboot the controller. Enter
y
when this prompt appears:
The system has unsaved changes. Would you like to save them now? (y/n)
The controller reboots.
Step 7
To verify that the controller is properly configured, log back into the CLI and enter
show 802.11b
to
view these parameters:
802.11b Network................................ Enabled
Short Preamble mandatory....................... Disabled
These parameters show that the 802.11b/g network is enabled and that short preambles are disabled.