The multirack cabling service allows you to extend the capability of the Exalogic rack systems to beyond just a single rack. The multirack cabling service allows you to cable up to eight Exalogic machine full racks together, without requiring any external InfiniBand switches.
It is assumed that all racks are adjacent to each other, in a side-by-side configuration. If racks are not side-by-side, then you may need to purchase longer cables for the extended connections. Placing the racks in any configuration other than side-by-side may require you to purchase additional 10–meter cables. Cable lengths across computer room aisles can vary from site to site, and may increase the difficulty of determining the cable lengths that you may need to purchase.