TP-Link TL-SG2109WEB User Guide - Page 21

Port Statistic and Port Status, Storm Control

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TL-SG2109WEB/TL-SL2210WEB/TL-SL2218WEB/TL-SL2428WEB/TL-SL2452WEB Web Smart Gigabit Switch Family User's Guide If the port security is enabled, it will not learn new MAC address and only transmit the frames from the MAC address list in the port's static MAC address table. 4.2.2 Port Statistic and Port Status Port Statistic calculates the statistics of each port, such as how many frames, error frames, broadcast frames it has received, and so on. Port Status indicates whether the port is linked, not linked or disabled, what speed and duplex mode it is working on, and whether flow control is enabled or disabled. 4.2.3 Storm Control Storm control limits the amount of multicast, broadcast and UL (the address hasn't been learned) frames accepted and forwarded by the device. When Layer 2 frames are forwarded, broadcast, multicast and UL frames are flooded to all ports on the relevant VLAN. This occupies bandwidth, and loads all nodes on all ports. A Storm is a result of an excessive amount of these frames simultaneously transmitted across a network by a single port. Forwarded message responses are heaped onto the network, straining network resources or causing the network to time out. Storm control is enabled for all ports by defining the packet type and the rate at which the packets are transmitted. The system measures the incoming defined frame rates on each port, and discards the frames when the rate exceeds a user-defined rate. 14

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14
Web Smart Gigabit Switch Family User's Guide
TL-SG2109WEB/TL-SL2210WEB/TL-SL2218WEB/TL-SL2428WEB/TL-SL2452WEB
If the port security is enabled, it will not learn new MAC address and only
transmit the frames from the MAC address list in the port’s static MAC address
table.
4.2.2
Port Statistic and Port Status
Port Statistic calculates the statistics of each port, such as how many frames,
error frames, broadcast frames it has received, and so on.
Port Status indicates whether the port is linked, not linked or disabled, what
speed and duplex mode it is working on, and whether flow control is enabled
or disabled.
4.2.3
Storm Control
Storm control limits the amount of multicast, broadcast and UL (the address
hasn't been learned) frames accepted and forwarded by the device. When
Layer 2 frames are forwarded, broadcast, multicast and UL frames are flooded
to all ports on the relevant VLAN. This occupies bandwidth, and loads all
nodes on all ports.
A Storm is a result of an excessive amount of these frames simultaneously
transmitted across a network by a single port. Forwarded message responses
are heaped onto the network, straining network resources or causing the
network to time out. Storm control is enabled for all ports by defining the
packet type and the rate at which the packets are transmitted. The system
measures the incoming defined frame rates on each port, and discards the
frames when the rate exceeds a user-defined rate.