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Cisco Bug: CSCuj66406 - DHCP Option-82 data missing when L3 roamed

Last Modified

Dec 19, 2018

Products (1)

  • Cisco 5500 Series Wireless Controllers

Known Affected Releases

7.6(1.75)

Description (partial)

Symptom:
When client roams from anchor to foreign WLC and WLAN is enabled for DHCP option 82, the WLC does not forward the DHCP requests with option 82 AP MAC address, but uses 00:00:00:00:00:00 MAC address for AP.

Same behavior in an Auto-Anchor Mobility WLAN, as this happens because the Anchor WLC never knows about the specific AP MAC address (this is handled by Foreign WLC, which manages the AP where client is connected), so Anchor can't use this value to be sent over Option-82.

Conditions:
Any scenario with ANCHOR WLC:
- Mobility L3 roam.
- Auto-Anchor Mobility WLAN.

This is day-1 behavior.
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