Cisco Bug: CSCuo20409 - 5GHz radios reset with reason code 71
Apr 01, 2020
- Cisco Aironet 3700 Series Access Points
Known Affected Releases
15.2(4)JN 15.3(3)JA1 7.6(110.24) 7.6(130.0)
Symptom: 5GHz radio (Dot11Radio1) goes down, disconnecting all associated clients, then comes back up about six seconds later. Logs similar to the following are seen on the AP: *Mar 20 07:26:16.899: %CLEANAIR-6-STATE: Slot 1 down *Mar 20 07:26:25.323: %EVT-4-WRN: Write of flash:/event.r1 done *Mar 20 07:26:25.995: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to resetPCI reset port 1 *Mar 20 07:26:27.295: soap_pci_reconfig_radio: radio id 1 *Mar 20 07:26:27.331: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio1, changed state to down *Mar 20 07:26:32.615: %LINK-6-UPDOWN: Interface Dot11Radio1, changed state to up *Mar 20 07:26:33.615: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio1, changed state to up *Mar 20 07:26:48.775: %CLEANAIR-6-STATE: Slot 1 enabled The event.r1 file on flash will contain messages similar to the following corresponding to this reset event, indicating that the radio reset due to reason code 71: Radio d1 reset: DMA Prefetch Mar 20 07:26:13.327: %EVT-5-NTC: Radio d1 FST 06 Flags 2020105 BCN 1 Mar 20 07:26:13.327: %EVT-5-NTC: Radio d1 RST 71 Flags 202010D BCN 1 Conditions: 5 GHz radio on 3700/2700/1700 series access points.
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