Fcoe Modes - HP 5920 SERIES Fc And Fcoe Configuration Manual

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3. The FCF switch periodically sends unsolicited Discovery Advertisements, whose fcf priority field
carries the FCF priority of the system.
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 the establishment of the
virtual link.
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, 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
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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
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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
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operate in ENode mode or FCF mode.
An FC or 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:
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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
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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:
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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
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provide any FC or FCoE capabilities.
If they match, the switch replies with a solicited Discovery Advertisement, whose fcf priority
field carries the FCF priority of the VFC interface.
If they do not match, the switch discards the Discovery Solicitation.
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