Dell Networking MXG610s Fibre Channel Switch

The Dell Networking MXG610s is the 32Gb Fibre Channel I/O module for the PowerEdge MX7000 chassis: sixteen internal server-facing FC ports that need no optics, eight external SFP+ ports at 8, 16 or 32Gbps, and two external QSFP+ ports carrying four FC ports each, running Brocade Fabric OS in either full fabric switch or Access Gateway mode.

Where the ports are and what they cost you

The sixteen internal ports connect over the MX7000 midplane to the mini-mezzanine FC adapters in the compute sleds. They run at 16 or 32Gbps depending on the adapter and they require no transceivers at all, which is the single biggest cost difference between an in-chassis FC module and a rack FC switch of equivalent port count.

Externally the module gives you sixteen fabric-facing ports in two different shapes. Eight are conventional SFP+ cages that auto-negotiate 8, 16 or 32Gbps. The other eight arrive through two QSFP+ ports, four ports per QSFP, at 16 or 32Gbps. Using the QSFP ports aggregates Fibre Channel traffic into fewer physical connections, which means fewer SFPs to buy, less cabling to dress and lower power draw for the same bandwidth. Those same QSFP ports are how you interconnect MX7000 chassis, and how you build Inter-Switch Links into Connectrix or Brocade switches that support QSFP.

Ports are licensed in eight-port increments through dynamic Ports on Demand, so a chassis that starts with a half-populated fabric can grow without a hardware change.

Performance and fabric behaviour

In full fabric switch mode the module carries 1,024Gbps of switching bandwidth - thirty-two ports at 32Gb. In Access Gateway mode, which is the default, throughput is 512Gbps across the sixteen server-facing ports. Locally switched ports see 900 nanoseconds or less of port-to-port latency including forward error correction, with 2,000 dynamically allocated frame buffers behind a 2,112-byte maximum payload.

Up to eight ISLs combine into a single 256Gbps logical trunk using frame-based trunking, and exchange-based Dynamic Path Selection spreads traffic across available ISLs automatically rather than pinning flows to one link. The fabric scales to a documented maximum of 239 switches, with a certified maximum of 6,000 active nodes, 56 switches and 19 hops in a Fabric OS fabric.

Access Gateway mode deserves a note, because it is what most blade deployments actually run. In that mode the module presents itself to the upstream fabric as an NPIV host rather than as a switch, so it consumes no domain ID and adds no hop. That is how you drop an MX7000 into an existing Cisco MDS or Brocade fabric without renumbering anything or negotiating with the SAN team about domain counts. Full Fabric Switch mode is there when the module is the fabric.

Two models, and what that means for refurbished units

Dell shipped the MXG610s in two forms. The base sixteen-port model includes four short-wavelength SFP+ transceivers and no software bundle. The sixteen-port enterprise model includes eight short-wavelength SFP+ transceivers and arrives with ISL Trunking, Fabric Vision and Extended Fabric licences pre-installed. Either can be upgraded to the enterprise bundle later.

On the secondary market that distinction matters less than it looks, because modules almost always arrive with their transceivers already stripped - both units we have photographed came in with all eight SFP+ cages empty. Plan on sourcing optics separately regardless of which part number you receive, and tell us what your fabric runs on so the right short- or long-wavelength parts go in the box. If pre-installed enterprise licensing is a requirement rather than a preference, say so on the quote and we will verify licence state on the specific unit before it ships.

Fabric Vision, diagnostics and NVMe readiness

Because the MXG610s runs Brocade Fabric OS, it inherits the Fabric Vision toolset rather than a cut-down blade version of it. IO Insight measures device latency and IOPS at the switch so you can tell a slow array from a slow host without instrumenting either. VM Insight follows performance per virtual machine using standards-based VM tagging. MAPS turns monitoring into policy-based alerting instead of dashboards nobody watches, Fabric Performance Impact monitoring detects high latency and quarantines slow-drain devices before they back-pressure the whole fabric, and COMPASS keeps configuration consistent across switches. ClearLink diagnostics test optics and cabling - electrical and optical loopback, link traffic, latency and distance - which is how you commission a fabric without a separate test set.

Security is the full Fabric OS set: DH-CHAP between switches and end devices, FCAP switch authentication, RBAC with user-defined roles, RADIUS, TACACS+, LDAP over IPv6, IPsec, port binding, switch binding and trusted switch. The module is ready for NVMe over Fibre Channel through a non-disruptive upgrade when you choose to move to it.

Power, cooling and physical fit

Like every MX7000 I/O sled, the MXG610s has no power supply and no fans - the chassis provides redundant power and cooling to the fabric slots, and there are no rails to buy. Draw is 60W maximum, 57W typical. The sled measures 1.08 by 8.44 by 9.49 inches and weighs 3.79 lbs. Standard operating range is a wide -5 to 50 degrees C, with continuous expanded-range operation supported from 5 to 50 degrees C - notably more tolerant than the Ethernet fabric modules in the same chassis. Console access is over a single micro-USB Type B port.

Choosing between the MX7000 I/O modules

• MXG610s - 32Gb Fibre Channel, Brocade Fabric OS, full SAN fabric services (this page).
• MX9116N Fabric Switching Engine - 25GbE to the sleds with 100GbE uplinks. It can break two of its QSFP28 ports into eight 32Gb FC connections for direct attach or NPIV proxy, which covers a light FC requirement without a second module.

The practical dividing line: if Fibre Channel is a few connections to one array, the MX9116N's breakout is enough and saves a fabric slot. If Fibre Channel is a real SAN with zoning, trunking, multiple arrays and a storage team that expects Fabric OS tooling, this is the module. Where the platform is the older PowerEdge M1000e rather than the MX7000, MX-series modules do not fit at all - see the PowerConnect M8024-K and M6220 for that generation.

Condition, testing and support

Every unit is professionally refurbished: inspected, cleaned, configuration-wiped, firmware-checked and functionally tested before it ships, and it ships with warranty. Dell shipped this module under more than one part number - the hardware is identical MXG610s in each case - so if a quote or an existing chassis references a different Dell DP/N than the one listed here, it is very likely the same module and we will confirm before you order.