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Cisco Bug: CSCus03250 - Stale IPDT entries denying connectivity to new clients

Last Modified

Jan 28, 2017

Products (1)

  • Cisco Catalyst 3850 Series Switches

Known Affected Releases

10.2(111.0)

Description (partial)

Symptom:
Stale IPDT entries denying connectivity to new clients.
We may see logs like this:
...
Dec  4 12:25:15.856 CET: %WCDB-3-WCDB_IP_CONFLICT: The host 60d8.195a.2e9d source-DHCP on Interface Capwap14 is using the IP 10.194.74.148 of the host 9c20.7b0b.1234 source-DHCP on Interface Capwap65.
...
5760#show access-session mac 9c20.7b0b.1234 det 
No sessions match supplied criteria. 
5760#
5760#show wcdb database 9c20.7b0b.1234 
WCDB entry not found for 9c20.7b0b.1234 
5760#
5760# show ip device tracking ip 10.194.74.148
Global IP Device Tracking for clients = Enabled
Global IP Device Tracking Probe Count = 3
Global IP Device Tracking Probe Interval = 30
Global IP Device Tracking Probe Delay Interval = 0
-----------------------------------------------------------------------------------------------
  IP Address    MAC Address   Vlan  Interface           Probe-Timeout      State    Source
-----------------------------------------------------------------------------------------------
10.194.74.148   9c20.7b0b.1234 779  Capwap65               30              ACTIVE   DHCP

...

Conditions:
Wireless setup with external DHCP server. 
IPDT enabled.
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