Brocade Communications Systems 53-1002163-02 manual Name server, FC zoning

FCoE Initialization Protocol 1

•Commit and abort—Defined logingroup changes can be aborted with no effect on existing sessions. The Brocade FCoE hardware does not apply the configurations to new sessions until the changes are committed. Once defined, logingroups are committed. The Brocade FCoE hardware immediately uses the new configuration.

•No traffic disruption—Changing the logingroup without committing the changes does not affect existing sessions. After committing the changes, ENodes that were already logged in continue to function even when that member is removed from the logingroup. New logins from the former member are rejected.

Name server

The Brocade FCoE hardware name server function operates as follows:

•ENode login and logout to and from the Brocade FCoE hardware updates the name server in the FC fabric. The Brocade FCoE hardware maintains the MAC address to WWN/PID mappings.

•ENode login and logout—When an ENode login occurs through any means (FIP FLOGI, FIP FDISC, FCoE FLOGI, or FCoE FDISC), an entry is added to the name server. When an ENode logout occurs through any means (FIP LOGO, FCoE LOGO, or implicit logout), the entry is removed from the name server.

•ENode data—The Brocade FCoE hardware maintains a VN_port table. The table tracks the ENode MAC address, FIP login parameters for each login from the same ENode, and WWN/PID mappings on the FC side. You can display the VN_port table with the fcoe -loginshowport command.

FC zoning

The Brocade FCoE hardware FC zoning operates as follows:

•The virtual devices created by the Brocade FCoE hardware on behalf of the ENodes are subject to FC zoning. An ENode is only allowed to access devices in the same zones. Administrative Domains (ADs) are not supported in the Fabric OS v7.0.0 release.

•ENodes can access FC devices in the same zones— FC devices that are not in the same zones cannot be accessed. Zone members can overlap in multiple zones (that is, overlapping zones). Zoning changes are immediately enabled by hardware enforced zoning.

•ENodes can access all FC devices with no zoning—ENodes can access all FC devices in the fabric when cfgdisable is issued and Default Zone is set to All Access Mode.

•Field replacement—When a Brocade FCoE hardware is replaced in the field, you can perform a configdownload on a previously saved configuration. No zoning change is required.

Registered State Change Notification (RSCN)

The Brocade FCoE hardware RSCN function operates as follows:

•RSCN events generated in the FC fabric are forwarded to the ENodes. RSCN events generated on the FCoE side are forwarded to the FC devices. CEE is not aware of RSCN events.

•Device RSCN—An RSCN is generated to all registered and affected members when an ENode either logs in or logs out of an FCF through any means. An RSCN is generated when an FC N_port device either logs in or logs out of the FC fabric.

Converged Enhanced Ethernet Administrator’s Guide	11
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