MicroNet Technology SP1659P user manual 3.19 QoS, y Storm Type, y Storm Rate

yPort No.: Choose the port that you would like this function to work on it. Valid range of the port is 1~26.

yRate: Set up the limit of Egress bandwidth for the port you choose. Packet transmission will be delayed if the rate exceeds the value you set up in Data Rate field. Traffic may be lost if egress buffers run full. The format of the packet limits to unicast, broadcast and multicast. Valid value of Port 1~24 ranges from 66~102400, and Port 25~26 ranges from 66~1024000 with the minimum unit of 1. Default value of Port 1~24 is 102400 and Port 25~26 is 1024000.

3.18.3Storm

Bandwidth Management function is used to set up the limit of Ingress and Egress bandwidth for each port.

Parameter description:

yStorm Type:

Disable:

Disable the function of the bandwidth storm control.

Broadcast Storm Control:

Enable the function of bandwidth storm control for broadcast packets.

Multicast Storm Control:

Enable the function of bandwidth storm control for multicast packets.

Unknown Unicast Storm Control:

Enable the function of bandwidth storm control for unknown unicast packets. These packets are the MAC address that had not completed the learning process yet.

Broadcast, Multicast, Unknown Unicast Storm Control:

Enable the function of bandwidth storm control for all packets in transmission.

yStorm Rate :

Set up the limit of bandwidth for storm type you choose. Valid value of the storm rate ranges from 1-100 with the minimum unit of 1. And only integer is acceptable. Default is 100.

3.19 QoS

The switch supports 5 kinds of QoS, are as follows, MAC Priority, 802.1p Priority, IP TOS Priority, and DiffServ DSCP Priority. Port Based Priority has a special name called VIP Port in the switch. Any packets enter VIP Port will have highest transmitting priority. MAC Priority act on the destination address of MAC in packets. VLAN tagged Priority field is affected by 802.1p Priority setting. IP TOS Priority affects TOS fields of IP header, and you can find it has 8-bit SERVICE TYPE field that specifies how the datagram should be handled. The field could be divided into six subfields as follows, PRECEDENCE (3 bits), D-Type (Delay Priority, 1 bit), T-Type (Throughput Priority, 1bit), R-Type (Reliability Priority, 1bit), M-Type (Monetary Cost Priority, 1bit), and

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