Milan Technology MIL-SM8002TG - Manual (Page 142)

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Prot Mirroring interface
Rate Limiting
You can set up every port’s bandwidth rate and packet limitation type.
Ingress Limit Packet type: select the packet type that wants to filter. The packet
types have all type packet, broadcast/multicast/unknown unicast packet,
broadcast/multicast packet, and broadcast packet only. The
broadcast/multicast/unknown unicast packet, broadcast/multicast packet, and
broadcast packet only are only for ingress packet. The egress rate only supports all
type packet.