Dell M1000E manual CMC Daisy Chaining Enclosure Stacking, Cabling Guidelines

CMC Daisy Chaining (Enclosure Stacking)

CMC daisy chaining can be utilized to minimize the number of network connections required for chassis (enclosure) management, such that only one or two network connections (depending on whether or not redundant CMCs are installed) are needed for up to four M1000e enclosures.

Cabling Guidelines

Follow these guidelines to daisy chain CMC modules from enclosure to enclosure:

•CMC Ethernet port GB1 is the Uplink port. It uplinks to either the management network, or to receive a cable from the CMC Ethernet port labeled STK in the adjacent enclosure.

The CMC Ethernet port labeled STK is the daisy-chain port. It connects only to CMC port GB1 on the adjacent enclosure. Do not connect this cable directly to the management network.

•Up to four enclosures can be daisy chained.

•Enclosures can be daisy chained in both redundant and non-redundant deployments:

–In a redundant CMC deployment, cable all CMC modules in the CMC primary slots together. Cable all CMC modules in the CMC secondary slots together.

NOTE: Do not connect the primary daisy chain with the secondary daisy chain (do not cross cable the two sets of CMCs).

–In a non-redundant CMC, cable all CMC modules in the CMC primary slots together.

Figure 1-15 shows four enclosures with redundant CMC modules installed. Primary CMC port GB1 in the first enclosure connects to the management network. Primary CMC port GB1 in the adjacent enclosure is uplinked into the port labeled STK on the primary CMC in the enclosure above it. No cable is required in port STK on the fourth enclosure in line. The same cabling scheme is valid for the daisy chain of CMC modules in the secondary slot of the enclosures.

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