ID:186493 GXB transmitter <name> and GXB receiver <name> are placed in different physical channels. This prevents them from supporting loopback in the future

CAUSE: The specified gigabit transceiver block (GXB) Transmitter and Receiver are placed in different physical channels. This prevents them from supporting loopback in the future.

ACTION: To add loopback later in the design cycle, place the specified GXB transmitter and receiver in the same physical channel.