Description of the illustration X9M rear

The image shows the external network connectivity for the RA21. The backplane has two power supplies on the left. To the right of this are slots 1 through 3, each with a lower and upper slot. The lower half of slot 1 has a card with two QSFP2B RoCE Fabric ports. The lower half of slot 2 has three management ports labeled left-to-right Serial MGT, ILOM MGT, and HOST MGT. The upper half of slots 1 and 3 are used together, either each with Quad 10G Network cards [factory install], or each with Dual 25G Network cards. The upper half of slot 2 has the option for a Dual 32G HBA (Tape) card that can be field installed. Slot 2 cannot be used for other network cards. The lower half of slot 3 is not used.