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Cisco Bug: CSCvh67590 - WLC delay packets due to high DP packet buffers in use

Last Modified

Dec 03, 2019

Products (1)

  • Cisco 5500 Series Wireless Controllers

Known Affected Releases


Description (partial)

WLC delay packets forwarding/responses with high number of APs connected.
With more load on WLC it will have huge delays so it becomes unreachable and APs start to drop.

2500+ APs connected, it only happens when source NAT is applied between APs and WLC where all APs are seen with single IP address:
       AP Name         Local Port        Peer IP        Peer Port                Ciphersuite          
 -------------------- ------------- ----------------  -------------     ------------------------------
 SIM-AP-2821           Capwap_Ctrl      57985           TLS_RSA_WITH_AES_128_CBC_SHA
 SIM-AP-2822           Capwap_Ctrl      57987           TLS_RSA_WITH_AES_128_CBC_SHA
 SIM-AP-2823           Capwap_Ctrl     57989           TLS_RSA_WITH_AES_128_CBC_SHA

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Latest activity: May 27, 2018
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