American Fibertek SM9p - Manual (Page 74)

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broadcast packet only are only for ingress packet. The egress rate only supports all
type packet.
 All the ports support port ingress and egress rate control. For example, assume port 1
is 10Mbps, users can set it’s effective egress rate is 1Mbps, ingress rate is 500Kbps.
The switch performs the ingress rate by packet counter to meet the specified rate.
 Ingress: enter the port effective ingress rate. The default value is “0”.
 Egress: enter the port effective ingress rate. The default value is “0”.
Rate Limiting interface