ZyXEL Communications GS2210 series Handbook page 149

9 Host-C should no longer be able to reach the USG.
10 Access the Switch's Web GUI. Go to Advance Application >
Anti-Arpscan. Port 2 should now be in an Err-disabled state.
Note:
If Errdisable Recovery has been configured, Port 2 state should change
to forwarding after the Errdisable Recovery Interval. Host-C will be able
to reach the USG, afterwards.
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