HP ProCurve 2610-PWR Management And Configuration Manual: Configuring Port-based Priority For Incoming Packets; The Role Of 802.1q Vlan Tagging

Procurve 2610 series procurve 2610-pwr series.

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Advanced traffic management manual - 364 pages

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Contents
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Port Status and Basic Configuration

Configuring Port-Based Priority for Incoming Packets

Configuring Port-Based Priority for

Incoming Packets

Feature

Assigning a priority level to traffic on the basis

of incoming port

When network congestion occurs, it is important to move traffic on the basis

of relative importance. However, without prioritization:

■

Traffic received in tagged VLAN packets carries a specific 802.1p priority level

(0 - 7) that the switch recognizes and uses to assign packet priority at the

outbound port. With the default port-based priority, the switch handles traffic

received in untagged packets as "Normal" (priority level = 0).

You can assign a priority level to:

■

(The switch does not alter the existing priority level of inbound, tagged VLAN

packets carrying a priority level of 1-7.)

Thus, for example, high-priority tagged VLAN traffic received on a port retains

its priority in the switch. However, you have the option of configuring the port

to assign a priority level to untagged traffic and 0-priority tagged traffic the

port receives.

The Role of 802.1Q VLAN Tagging

An 802.1Q-tagged VLAN packet carries the packet's VLAN assignment and the

802.1p priority setting (0 - 7). (By contrast, an untagged packet does not have

a tag and does not carry a priority setting.) Generally, the switch preserves

and uses a packet's priority setting to determine which outbound queue the

packet belongs in on the outbound port. If the outbound port is a tagged

member of the VLAN, the packet carries its priority setting to the next,

10-28

Default

Traffic from less important sources can consume bandwidth and slow

down or halt delivery of more important traffic.

Most traffic from all ports is forwarded as normal priority, and competes

for bandwidth with all other normal-priority traffic, regardless of its

relative importance.

Inbound, untagged VLAN packets

Inbound, tagged VLAN packets having a priority level of 0 (zero)

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HP PROCURVE 2610 Advanced Traffic Management Manual 364 pages

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This manual also for:

Procurve 2610-24, Procurve 2610-48, Procurve 2610-24-pwr, Procurve 2610-48-pwr, Procurve 2610-24/12-pwr