It normally means STP loops and MAC addresses are learned once on a port. Occasionally, when a switched network reconfigures, due to either manual or STP reconfiguration, addresses learned on one port are relearned on a different port.
track down the mac address and if that server is having dual NIC with teaming configration then better to ask server team to do active/passive teaming for solution.
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Cisco IOS-XE 17.3.1 – Catalyst Switching Updates
Table of Contents
Hardware Additions since IOS-XE 17.2.1
Key Summary Features
Platform and Infra Features
High Availability Features
Routing / MPLS / VPN Features
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