HP 5300 Informacje Techniczne Pobierz pdf (Strona 257)

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101

Port Traffic Controls

Rate-Limiting

■ Network Stress Conditions: Under normal network operating condi-

tions, rate-limiting limits inbound traffic on a port to no more than the

configured level. However, under network stress conditions, the port may

allow occasional bursts of inbound traffic forwarding that exceed the

configured rate.

■ Optimum Rate-Limiting Operation: Optimum rate-limiting occurs

with 64-byte packet sizes. Traffic with larger packet sizes can result in

performance somewhat below the configured inbound bandwidth. This

is to ensure the strictest possible rate-limiting of all sizes of packets.

■ Outbound Traffic Flow: Configuring rate-limiting on a port does not

control the rate of outbound traffic flow on the port.

■ Rate-Limiting Effect on Port Trunks: Port trunks are not currently

supported on ports configured for rate-limiting. Configuring a port for

rate-limiting and then adding it to a trunk suspends rate-limiting on the

port while it is in the trunk. Attempting to configure rate-limiting on a port

that already belongs to a trunk generates the following message:

< port-list >: Operation is not allowed for a trunked port.

■ Traffic Filters on Rate-Limited Ports: Configuring a traffic filter on a

port does not prevent the switch from including filtered traffic in the

bandwidth-use measurement for rate-limiting. That is, where rate-limiting

and traffic filtering are configured on the same port, the inbound, filtered

traffic is included in the bandwidth measurement for calculating when the

limit has been reached. Traffic filters include:

• ACLs

• Source-Port filters

• Protocol filters

• Multicast filters

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