Cipher Suites and WEP
Configuring Cipher Suites
7
Cisco 3200 Series Wireless MIC Software Configuration Guide
Enabling Cipher Suite with 12.3(8)JK or Earlier Releases
To enable a cipher suite
, follow these steps, beginning in privileged EXEC mode:
Use the
no
form of the encryption command to disable a cipher suite.
This example sets up a cipher suite for VLAN 1 that enables CKIP, CMIC, and 128-bit WEP:
bridge# configure terminal
bridge(config)# interface dot11radio 0
Command
Purpose
Step 1
configure terminal
Enters global configuration mode.
Step 2
interface dot11radio 0
Enters interface configuration mode for the radio interface.
Step 3
encryption
[
vlan
vlan-id
]
mode ciphers
{[
aes-ccm | ckip
|
cmic
|
ckip-cmic
|
tkip
]} {[
wep128
|
wep40
]}
Enables a cipher suite containing the WEP protection you need.
(
Table 3
lists guidelines for selecting a cipher suite to match the
type of authenticated key management you configure.)
•
(Optional) Select the VLAN for which you want to enable
WEP and WEP features.
•
Set the cipher options.
Note
You can combine TKIP with 128-bit or 40-bit WEP.
Note
You can combine AES with TKIP. In this case, AES is
the unicast cipher and TKIP becomes the group cipher.
Note
If you enable a cipher suite with two elements (such as
TKIP and 128-bit WEP), the second cipher becomes the
group cipher.
Note
You can also use the
encryption mode wep
command
to set up static WEP. However, you should use
encryption mode wep
only if none of the non-root
bridges that associate to the root device are capable of
key management. See the
Cisco IOS Command
Reference for Cisco Access Points and Bridges
for a
detailed description of the
encryption mode wep
command.
Note
When you configure TKIP-only, AES-only, or the
combination of AES and TKIP (no WEP included) on
any radio interface or VLAN, the SSID on that radio or
VLAN must be set to use WPA or CCKM key
management. If you do not configure key management
on the SSID, non-root bridge authentication fails on the
SSID.
Note
Cisco Key Integrity Protocol (CKIP) and
CKIP-Cisco Message Integrity Protocol (CMIP) are
supported only on the 2.4-GHz (802.11b/g) WMIC.
Step 4
end
Returns to privileged EXEC mode.
Step 5
copy running-config startup-config
(Optional) Saves your entries in the configuration file.