HP ProCurve 3500-24 Reference Manual: Optimizing The 10-gbe Port Configuration

Hp procurve 3500-24: reference guide.
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Optimizing the 10-GbE port configuration

The 10-GbE modules (J8707A, J8708A, J9309A, and J8694A) used in the HP ProCurve Switch 8200zl, select
3500, 5400zl, and 6200yl series are designed to deliver full 10 Gbps wire-speed to each port, where either
one or two ports are in a linked state with another device . When three or four 10-GbE ports are in a linked
state, the module supports an aggregate bandwidth of 28 .8 Gbps across the linked ports .
As illustrated in the figure below, internally, there are two 14 .4 Gbps channels between each 4-port 10-GbE
module and the switch fabric .
Figure 21. 10-GbE module architecture showing ports grouped by 14.4 Gbps channel. Architecture model applies to the HP ProCurve Switch 8200zl,
5400zl, select 3500, and 6200yl series product lines.
• When any two 10-GbE ports on a given module are in a linked state, each port automatically operates on its
own channel, which guarantees 10 Gbps of bandwidth for each port .
• When more than two ports of a 10-GbE module are in a linked state, ports 1 and 4 are statically mapped
to share one 14 .4 Gbps channel, while ports 2 and 3 are statically mapped to share the other 14 .4 Gbps
channel .
– If only one port in a given channel is in a linked state, then that port operates at wire-speed and the other
port uses no bandwidth .
– If both ports in a given channel are in a linked state, then the 14 .4 Gbps of bandwidth is balanced fairly
between the two ports .
For example, in an application where three ports on the module are needed and it is important to ensure that
port 1 always has a full 10 Gbps available, the connection choices shown in the next figure would be used .
Figure 22. Approach for guaranteeing 10 Gbps on a specific port

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