3.11.2. Bonded Configurations
In a bonded configuration, both the high speed serial and low speed parallel clocks are routed from the transmitter PLL to the transmitter channel. In this case, the local CGB in each channel is bypassed and the parallel clocks generated by the master CGB are used to clock the network.
In bonded configurations, the transceiver clock skew between the channels is minimized. Use bonded configurations for channel bonding to implement protocols such as PCIe* and XAUI.