H3C Technologies H3C S10500 Series Switches - Manual (Page 20)

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The sending interval is specified by using the fcoe fka-adv-period command and defaults to 8
seconds.
4. After receiving the Discovery Advertisements, the ENode determines the FCF switch with the
highest priority according to the fcf priority field. Then, the ENode sends a FLOGI request to that
switch for login.
5. After receiving the FLOGI request, the FCF switch identifies whether the source MAC address
matches its learned or bound FCoE MAC address.
{
If they match, the FCF switch sends a FLOGI LS_ACC, which indicates that the establishment of
the virtual link is completed.
{
If they do not match, the FCF switch discards the FLOGI request.
6. The FCF switch also periodically sends unsolicited Discovery Advertisements to maintain
established virtual links. If the ENode fails to receive an unsolicited Discovery Advertisement within
a period 2.5 times the FKA advertisement interval, it deletes the virtual link.
FCoE modes
The switch supports the following FCoE modes:
• FCF mode—A switch operating in this mode is called an FCF switch. Its VFC interfaces support E
mode (E_Port) and F mode (F_Port).
• NPV mode—A switch operating in this mode is called an N Port Virtualization (NPV) switch. Its VFC
interfaces support F mode (F_Port) and NP mode (NP_Port).
• Transit mode—A switch operating in this mode is called a Transit switch. Its Ethernet interfaces can
operate in ENode mode or FCF mode.
An FCoE-capable switch can operate in the following modes:
• FCF mode—When the switch operates in this mode, it can perform one of the following operations:
{
Connect to the E_Port on another FCF switch through its E_Port.
{
Connect to the N_Port on a node or the NP_Port on an NPV switch through its F_Port.
• NPV mode—When the switch operates in this mode, it can perform one of the following
operations:
{
Connect to the N_Port on a node through its F_Port.
{
Connect to the F_Port on an FCF switch through its NP_Port.
• Transit mode—When the switch operates in this mode, you can perform one of the following tasks:
{
Configure an Ethernet interface to operate in ENode mode, so that the Ethernet interface can
receive traffic from only an ENode.
{
Configure an Ethernet interface to operate in FCF mode, so that the Ethernet interface can
receive traffic from only an FCF switch.
• Non-FCoE mode—When the switch operates in this mode, it is a standard switch and does not
provide any FCoE capabilities.
FCF mode
An FCF switch encapsulates FC frames in Ethernet frames and uses FCoE virtual links to simulate physical
FC links. An FCF switch provides the FC switch features on a lossless Ethernet network.