Cisco Bug: CSCtd52715 - Multiple entries for the same mac-add in DHCP snooping binding table
Jan 30, 2017
- Cisco Catalyst 4000 Series Switches
Known Affected Releases
Symptom: DHCP snooping binding table could maintain two different ip address for the same Mac address in different vlan. Conditions: DHCP snooping is deployed with dot1x authentication, snooping enabled on both guest vlan as well as authenticated vlan. Before the host authentication is completed, host may get a ip address from guest vlan, therefore creating first dhcp snooping binding for the host. After host authentication is completed, host will get a new ip address from authenticated vlan, which may resulting 2nd dhcp snooping binding created for the same host.
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Bug Details Include
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