Core Issue

Using 128-bit encryption on non-Cisco devices.

Resolution

The 802.11b specification defines only 40-bit WEP.  All implementations of 128-bit WEP are therefore vendor-specific.  This affects encryption between Cisco and third-party wireless devices.

If a non-Cisco device uses the same algorithm as the Cisco device, then a WEP-protected connection should be possible.  Each vendor uses their own algorithm for 128-bit encryption.  Cisco equipment uses 26 hexadecimal characters for the 128-bit WEP key.

If the non-Cisco card uses ASCII, you may need to convert to a hexadecimal value or vice-versa. However, since 128-bit Wired Equivalent Privacy (WEP) keys are not tested (40-bit keys are tested for compliance) by Wireless Ethernet Compatibility Alliance (WECA) for Wi-Fi compliance, there is no guarantee of interoperability.

Problem Type

Configure / Configuration issues

Products

Other vendor AP

Other vendor adapters

Version history
Revision #:
1 of 1
Last update:
‎06-22-2009 03:32 PM
Updated by: