Cisco Bug: CSCuj45983 - Don't make a client re-DHCP at CoA if not changing VLANs
Oct 02, 2020
- Cisco 5500 Series Wireless Controllers
Known Affected Releases
Symptom: When the WLC gets a CoA (Change of Authorization) RADIUS message (e.g. from ISE), the WLC will send a Deauth to the client, and move the client to DHCP_REQ state. Unless "DHCP Required" is disabled on the WLAN, this means that the client will then be disconnected, unless it performs a new DHCP request. With "debug client" in effect on the WLC, this message will be seen: DHCP_REQD (7) DHCP Policy timeout. Number of DHCP request 0 from client Conditions: WLC is using CoA from RADIUS, and has DHCP Required on the WLAN. Client is one that does not reliably re-DHCP upon 802.11 deauthentication - some Windows 7 and Mac OS X systems have been seen to have this problem.
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Bug Details Include
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