Cisco Bug: CSCvv01479 - Switch fails to program random mac addresses in hardware.
Sep 04, 2020
- Cisco Catalyst 2960-L Series Switches
Known Affected Releases
Symptom: Cat2960L switch might experience a situation where MAC address is learnt and inserted in the MAC address table and after roughly 5 seconds it is removed, in other words it ages out prematurely Conditions: This can be seen when there is an inconsistency between the Platform Dependent hash table where such a MAC address is already present (stale entry or a result of missed delete notification) and Platform Independent MAC address table where such a MAC address is not present. Since the switch believes address exists in hardware already new learn notification is not sent and as a result, this new MAC address is not properly installed in hardware forwarding engine [ASIC]
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.
Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
- Related Community Discussions
- Number of Related Support Cases