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Cisco Bug: CSCuq09859 - APs sending GARP and ARP requests aprox every 2 seconds.

Last Modified

Apr 02, 2020

Products (1)

  • Cisco Aironet 3700 Series Access Points

Known Affected Releases

7.4(121.0) 8.0(80.1)

Description (partial)

APs dropping traffic, while roaming phones will drop a few packets losing voice comunication.
Debug on the AP radio shows "o can not arp the ac ip address, retry later".
A packet capture on the AP will show the AP sending GARPs and ARP requests every 2 seconds or less, even when there is always a response from all devices.

11n or 11ac APs in the same VLAN as the WLC. Core router is VRRP and is frequently sending GARPs for its own address.
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