H3C Technologies H3C S5830V2 Series Switches - Manual (Page 17)

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Figure 5 FCoE for I/O consolidation
As shown in Figure 5 :
• In the traditional network, the server is connected to the LAN through an Ethernet interface and to
the SAN through an FC interface.
• In the FCoE network, the server is connected to the FCoE-capable FCF switch, and then the FCF
switch is connected to the LAN through an Ethernet interface and to the SAN through an FC
interface. The link between the server and the FCF switch can transmit both Ethernet packets and FC
frames.
Basic concepts
As shown in Figure 6 , the link between the FCF switch and the ENode (nodes that can transport FC over
Ethernet, such as servers and disk devices) can receive and send both Ethernet frames and FC frames.
Figure 6 FCoE network diagram
VFC interface and VN interface
A virtual fibre channel (VFC) interface is a logical interface manually created on an FCF switch to
simulate the function of a physical FC interface.
LAN SAN LAN SAN
Traditional network
Ethernet switch
Ethernet switch FC switch
Ethernet
switch
FCF switch
FC switch
FC switch
Server Server
I/O consolidation with FCoE
Ethernet
FC
FCoE
VFC interface
LAN SAN
Ethernet
switch
FCF switch
FC switch
ENode
Ethernet
FC
FCoE
FC interface
VN interface
Ethernet
interface