RTS DV-3400 Informações Técnicas descarregar pdf (Página 325)

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Port Traffic Controls

All-Traffic Rate-Limiting for the 5300xl, 3400cl and 6400cl Switches

Ports A3-A5 are configured with a

rate limit of 60 %. (Ports A1 and A2 are

not configured for rate-limiting.)

The outbound port priority

queues 1 - 4 for ports A1-A2 are

configured with the indicated

Guaranteed Minimum

Bandwidth percentages.

Figure 14-2. Example of Rate-Limit Settings Listed in the “show config” Output

Operating Notes for Rate-Limiting

■ Rate-Limiting is available on all types of ports on the switches covered by

this guide, and at all port speeds configurable for these devices. (Rate-

Limiting is not allowed on trunked ports.)

■ The configured rate limit on a port reflects the permitted forwarding rate

from the port to the switching fabric, and is visible as the average rate of

the outbound traffic originating from the rate-limited port. Also, rate-

limiting reflects the available percentage of a port’s entire inbound band-

width. The rate of inbound flow for traffic of a given priority and the rate

of flow from a rate-limited port to a particular queue of an outbound port

are not measures of the actual rate limit enforced on a port.

■ Rate-Limiting operates on a per-port basis, regardless of traffic priority.

Configuring rate-limiting on a port where other features affect inbound

port queue behavior (such as flow control) can result in the port not

achieving its configured rate-limiting maximum. For example, in some

situations with flow control configured on a rate-limited port, there can

be enough “back pressure” to hold high-priority inbound traffic from the

upstream device or application to a rate that is lower than the configured

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RTS DV-3400 Informações Técnicas Página 325

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