Installing the Switch

Sample Network Topologies

A11

A4

A2 A3

(X2)

(X2)

(CX4) (CX4)

14.4 Gbps

14.4 Gbps

14.4 Gbps

14.4 Gbps

Channel

Channel

Channel

Channel

10-GbE Module Ports

10-GbEPorts

Switch

Figure 2-25. 10-GbE port architecture showing ports grouped by 14.4 Gbps channel.

When any two 10-GbE ports are in a linked state, each port automatically operates on its own channel, which guarantees 10 Gbps of bandwidth for each port. However, when more than two ports are in a linked state, ports A1 and A4 are statically mapped to share one 14.4 Gbps channel, while ports A2 and A3 are statically mapped to share the other 14.4 Gbps channel.

To summarize:

■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 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.

Switch the Installing

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