> # Port Groups

> Each module or switch can have one or more ports in port groups that share common resources such as bandwidth and buffer credits. Port groups are defined by the hardware consisting of sequential ports. For example, ports 1 through 6, ports 7 through 12, ports 13 through 18, ports 19 through 24, ports 25 through 30, 31 through 36, and ports 37 through 42, 43 through 48 are the port groups on the 48-port 8-Gbps Advanced Fibre Channel switching modules.

> Table 13-2 shows the bandwidth and number of ports per port group for the Generation 2, Generation 3, and Generation 4 Fibre Channel modules, and Generation 2 and Generation 3 Fabric switches.

> Table 13-2 Bandwidth and Port Groups for the Fibre Channel Modules and Fabric Switches
> Part Number | Product Name/ Description | Number of Ports Per Port Group | Bandwidth Per Port Group (Gbps) | Maximum Bandwidth Per Port (Gbps)
> --- | --- | --- | --- | ---
> Generation 4 Modules
> DS-X9248-256K9 | 48-port 8-Gbps Advanced Fibre Channel switching module. | 6 | 32.41 or 12.82 | 8 or 10 Gbps—depending on the configuration
> DS-X9232-256K9 | 32-port 8-Gbps Advanced Fibre Channel switching module. | 4 | 32.41 or 12.82 | 8 or 10 Gbps—depending on the configuration
> Generation 3 Modules
> DS-X9248-96K9 | 48-port 8-Gbps Fibre Channel switching module | 6 | 12.8 | 8 Gbps
> DS-X9224-96K9 | 24-port 8-Gbps Fibre Channel switching module | 3 | 12.8 | 8 Gbps
> DS-X9248-48K9 | 4/44-port 8-Gbps Host-Optimized Fibre Channel switching module | 12 | 12.8 | 8/4 Gbps3
> Generation 3 Fabric Switches
> DS-C9148-K9 (Cisco MDS 9148 Fabric switch) | 48-port 8-Gbps Fabric switch | 4 | 32 | 8 Gbps
> Generation 2 Modules
> DS-X9148 | 48-port 4-Gbps Fibre Channel switching module | 12 | 12.8 | 4 Gbps
> DS-X9124 | 24-port 4-Gbps Fibre Channel switching module | 6 | 12.8 | 4 Gbps
> DS-X9304-18K9 (MSM-18/4 Multiservice module) | 18-port 4-Gbps Fibre Channel switching module with 4-Gigabit Ethernet ports | 6 | 12.8 | 4 Gbps
> DS-X9112 | 12-port 4-Gbps Fibre Channel switching module | 3 | 12.8 | 4 Gbps
> DS-X9704 | 4-port 10-Gbps Fibre Channel switching module | 1 | 10 | 10 Gbps
> Generation 2 Fabric Switches
> DS-C9134-K9 (Cisco MDS 9134 Fabric switch) | 32-port 4-Gbps Fabric switch | 4 | 16 | 4 Gbps
> 2-port 10-Gbps Fabric switch | 1 | 10 | 10 Gbps
> DS-C9124K9 (Cisco MDS 9124 Fabric switch) | 24-port 4-Gbps Fabric switch | 4 | 16 | 4 Gbps
> DS-C9222i-K9 (Cisco MDS 9222i Multiservice Modular switch) | 18-port 4-Gbps, 4 Gigabit Ethernet ports and a modular expansion slot. | 6 | 12.8 | 4 Gbps

> 1This bandwidth is available with the Fabric 3 module (DS-13SLT-FAB3) in the MDS 9513 switch. 2This bandwidth is available with the Fabric 2 module (DS-13SLT-FAB2) in the MDS 9513 switch, and with the Supervisor-2 (DS-X9530-SF2-K9) or Supervisor-2A module (DS-X9530-SF2AK9) in the MDS 9509 switch or MDS 9506 switch. 3A maximum of four ports (one per port group) in a 4/44-port 8-Gbps switching module can operate at 8-Gbps bandwidth in dedicated or shared mode. All the other ports can operate at a maximum of 4-Gbps in shared mode or dedicated mode.

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