H3C Technologies H3C S12500-X Series Switches - Manual (Page 20)

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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