Supermicro AOC-XEH-IN2 Uživatelský manuál stáhnout pdf (Strana 82)

Superblade Network Modules User’s Manual

6-18

6-8 Rate Control

The switch supports per-port rate control. When the data rate of the incoming frame for

a particular port exceeds a selected rate, the excess frame traffic is subject to packet

drops or flow control, depending on the per-port flow control configuration in the P

ORT

folder. If the flow control of a particular port is enabled, then the switch uses flow control

to inhibit any excess traffic. If the flow control is disabled, the excess frames will be

dropped.

To configure the ingress rate limit for a port, click on R

ATE in the left-hand side bar. The

ATE LIMIT AND STORM CONTROL screen appears as Figure 6-14.

The screen shows the Ingress Rate (in kilobits per sec) for all ports. Click on the port

number to control the ingress rates for the port. There are eight different levels to select:

no limit (1Gbps), 256Kbps, 1Mbps, 4Mbps, 16Mbps, 64Mbps, 128Mbps or 512Mbps.

The S

TORM CONTROL indicates the current status of storm control.

A traffic storm happens when broadcast, multicast or unknown unicast packets flood the

network, which will degrade the network performance. The storm control monitors the

traffic of an incoming particular type of frame (configured by the user) and limits traffic to

a user configurable rate level (threshold). The storm rate threshold is counted in number

of packets per second (pps). If the traffic of a particular frame type exceeds the

threshold during one second, all the rest of that type of frame will be dropped before the

end of that second.

The switch provides configuration to assign storm control type and rate limitations to the

entire system.

Figure 6-14. Rate Limit and Storm Control Screen

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Supermicro AOC-XEH-IN2 Uživatelský manuál Strana 82