How do S series switches handle packets with all-0 MAC addresses

You can configure an S series (except the 1700) and E series switch to discard or forward packets with all-0 source or destination MAC addresses.
The drop illegal-mac enable command enables a switch to discard packets with all-0 MAC addresses. By default, a switch does not discard packets with all-0 MAC addresses.
The drop illegal-mac alarm command configures a switch to generate an alarm when receiving packets with all-0 MAC addresses.
Note:
The drop illegal-mac alarm command allows a switch to generate only one alarm. To enable the switch to generate more than one alarm. reconfigure the drop illegal-mac alarm command.

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