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Cisco Bug: CSCul34640 - 2504 Backup port replys to APR request and it causes MACFLAP on SW

Last Modified

Feb 27, 2014

Products (1)

  • Cisco 5500 Series Wireless Controllers

Known Affected Releases


Description (partial)

When AP joins to WLC, AP sends ARP request to default GW.
Somehow WLC2504 bacup port sends ARP repy regarding that with high rate,
MACFLAP is detected on L2 SW and communication problem may happens.

AP and WLC exist on the same subnet.
WLC connects to same L2 SW from two port, one is primary and another is backup.

Problem does not happen with 5508
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