H3C Technologies H3C S5830V2 Series Switches - Manual (Page 23)

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Ethernet interfaces on a Transit switch can operate in ENode mode or FCF mode. An Ethernet interface
connected to an ENode must be configured to operate in ENode mode. An Ethernet interface connected
to an FCF switch must be configured to operate in FCF mode.
When Transit switches are interconnected, you must configure Ethernet interfaces to operate in the
correct modes. As shown in Figure 13 , ENode 2 can register with only FCF switch 2. To register ENode
2 with FCF switch 1, you must swap the operating modes of the Ethernet interfaces that connect the two
Transit switches.
Figure 13 Transit cascading network diagram
Figure 14 shows a network scenario where both Transit and NPV switches are present.
Figure 14 Network diagram for NPV and Transit switches
The primary responsibilities of Transit switches are filtering and forwarding FCoE protocol packets. They
can recognize and control FCoE packets as compared to standard Ethernet switches, but they do not
provide FCoE traffic processing capabilities as complex as FCF switches or NPV switches.
Protocols and standards
• FC-FS-3, Fibre Channel - Framing and Signaling - 3
• FC-SW-5, Fibre Channel - Switch Fabric - 5
• FC-LS-2, Fibre Channel - Link Services - 2
• FC-GS-6, Fibre Channel - Generic Services - 6
• FC-BB-5, Fibre Channel - Back Bone – 5