H3C S5120-EI Series Command Reference Manual page 75

Set the aging timer appropriately:
• A long aging interval may cause the MAC address table to retain outdated entries and fail to
accommodate the latest network changes.
A short aging interval may result in removal of valid entries and unnecessary broadcasts that may
•
affect device performance.
Examples
# Set the aging timer for dynamic MAC address entries to 500 seconds.
<Sysname> system-view
[Sysname] mac-address timer aging 500
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