Dell PowerEdge MX7000 Manual

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Contents

Dell PowerEdge MX7000 Manual Manual pdf 17 page image

5Input output fabricsThe following sections contain information about Dell EMC PowerEdge MX7000 Input output fabrics.Input output fabricsThe internal connection of the main I/O subsystem in MX7000 enclosure is referred to as fabric A and B. These fabrics areconnected using a direct orthogonal connection between sleds in the front of the chassis and I/O fabric modules in the rear. Themating connection on the sleds is on the mezzanine cards, which can install into location A or B on the sled.Each fabric A and B allows for two IOMs (that is, A1 and A2, or B1 and B2) for redundancy. Each IOM connects to all 8 computenodes through the orthogonal connectors. The connection from the IOM to each compute node (The mezzanine card on thecompute node) is a x8 bi-directional link. Depending on the interface, all the lanes within the link may not be used, however the x8provides a path for future high-bandwidth fabric types.Standalone pass through modulesTwo stand alone Ethernet pass through modules are supported in the initial release, a 10G (Base-T) and 25 GbE pass throughmodule. The pass-through IOMs plug into the fabric A or B IOM slots in the chassis. These IOMs redrive, or pass through the linksignals without any switching. Each shall provide 16 internal server-facing ports and 16 external user-facing ports.NOTE: Only the ports 1-8 are active, when compute sleds with dual-port mezzanine adapters are configured with thepass-through modules. The ports 9-16 require a quad-port mezzanine adapter.Front sled to rear port mappingsThe external port assignments of pass-thru modules are fixed due to the direct routing connection internal to the system and theIOM itself.NOTE: If storage or other peripheral sleds are installed that do not support fabric A/B connections, the correspondingports on the I/O modules mapping to these slots are not active. This is also the case for any compute sled that does nothave a mezzanine card that is installed for the particular IOM (A or B) in the system.A standard size compute sled is configured with dual port fabric A/B mezzanine maps to a single port on each (A or B) I/O module.Table 6. Compute sleds dual-port mappingCompute sled IOM x1 (top) IOM x2 (bottom)1 1 12 2 23 3 34 4 45 5 56 6 67 7 717