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.
•Whenanytwo10-GbEportsonagivenmoduleareinalinkedstate,eachportautomaticallyoperatesonits
own channel, which guarantees 10 Gbps of bandwidth for each port.
•Whenmorethantwoportsofa10-GbEmoduleareinalinkedstate,ports1and4arestaticallymapped
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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