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Cisco Bug: CSCsy76154 - No LAG - WLC sometime is using wrong port mac address to send packet

Last Modified

Jun 30, 2016

Products (1)

  • Cisco 5500 Series Wireless Controllers

Known Affected Releases

5.1(151.0)

Description (partial)

Symptom:
DHCP packets relayed by the WLC to the DHCP server may be intermittently lost.
Packet capture shows that the WLC is sourcing packets with the wrong MAC.

For example:

WLC port1 mac 11:11:11:11:11:11 / port2 mac 22:22:22:22:22:22

Packets are sent on port1 using a source MAC of 22:22:22:22:22:22

Now the connected switch to wlc will learn wrong mac-address-table 
information and therefore packets are lost.
 
Conditions:

LAG is not configured, and DHCP proxy is enabled.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
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