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Cisco Bug: CSCte08161 - cannot get IP address from server if key-management is "wpa optional"

Last Modified

Feb 28, 2018

Products (1)

  • Cisco Aironet 3700 Series

Known Affected Releases

12.4(21a)JA1 6.0(188.0)

Description (partial)

Symptom:

Wireless client does not get the IP address from dhcp server since AP 
does not forward the dhcp offer packet to the client if key-management 
is "wpa optional".
We can see 802.1x succeeds, then dhcp offer is in ethernet side.

This problem happens when dhcp offer is a broadcast packet.
If dhcp offer is an unicast packet, this problem does not happen.

12.4(10b)JDA does not cause this problem.

/config highlight/
dot11 ssid tsunami
   authentication open eap eap_methods 
   authentication network-eap eap_methods 
   authentication key-management wpa optional
!
interface Dot11Radio0
 encryption mode ciphers tkip wep128 

Condition:
 Reproducibility : Yes
 Condition : key-management is "wpa optional"
             dhcp offer is broadcast packet

 Components: 
 Software: 12.4(21a)JA1
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