Dell Networking S6000 Uživatelský manuál stáhnout pdf (Strana 712)

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101

Applying an Output QoS Policy to a Queue

Specifying an Aggregate QoS Policy

Applying an Output Policy Map to an Interface

3. Apply the policy map to an interface.

Applying an Output QoS Policy to a Queue

To apply an output QoS policy to a queue, use the following command.

• Apply an output QoS policy to queues.

INTERFACE mode

service-queue

Specifying an Aggregate QoS Policy

To specify an aggregate QoS policy, use the following command.

• Specify an aggregate QoS policy.

POLICY-MAP-OUT mode

policy-aggregate

Applying an Output Policy Map to an Interface

To apply an output policy map to an interface, use the following command.

• Apply an input policy map to an interface.

INTERFACE mode

service-policy output

You can apply the same policy map to multiple interfaces, and you can modify a policy map after you

apply it.

Enabling QoS Rate Adjustment

By default while rate limiting, policing, and shaping, Dell Networking OS does not include the Preamble,

SFD, or the IFG fields. These fields are overhead; only the fields from MAC destination address to the CRC

are used for forwarding and are included in these rate metering calculations.

The Ethernet packet format consists of:

• Preamble: 7 bytes Preamble

• Start frame delimiter (SFD): 1 byte

• Destination MAC address: 6 bytes

• Source MAC address: 6 bytes

• Ethernet Type/Length: 2 bytes

• Payload: (variable)

• Cyclic redundancy check (CRC): 4 bytes

• Inter-frame gap (IFG): (variable)

You can optionally include overhead fields in rate metering calculations by enabling QoS rate adjustment.

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Quality of Service (QoS)

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