Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 349)

command with the keyword of local (the default). The user can choose the global keyword to maintain
the previous configuration model In this case, the user cannot modify fcoe-enodes in an RBridge
context or max-enodes in a global context. The global keyword is provided only to support a
downgrade from the current release to the previous release.
FCoE queuing
The QoS configuration controls the FCoE traffic distribution.
NOTE
Changing these settings requires changes on both the Brocade VDX hardware and the Converged
Network Adapter (CNA); therefore, the link must be taken offline and put back online after a change is
made.
Traffic scheduler configuration changes affect FCoE traffic distribution as follows:
• Changing the priority group for a port causes the FCoE traffic distribution to be updated. The priority
group and bandwidth are updated.
• Changing the priority table for a port causes the FCoE traffic distribution to be updated. The CoS-to-
priority group mapping is updated.
• Changing the class map for a port causes the FCoE traffic distribution to be updated.
• Changing the policy map for a port causes FCoE traffic distribution to be updated.
• Changing the DCB map for a port causes the FCoE traffic distribution to be updated.
• The FCMAP-to-VLAN mapping determines the FCoE VLAN allowed for the FCoE session. Modifying
this mapping causes the existing sessions to terminate.
NOTE
Only one FCoE VLAN is supported in Network OS 4.0.0 and later releases.
FCoE upgrade and downgrade considerations
If an FCoE license is not present, FCoE interfaces are not created and the value of fcoe-enodes is 0.
When the license is installed, interfaces are created and the value of fcoe-enodes is set to the default
of 64 if the user does not change that value by means of the fcoe-enodes command. If the FCoE
license is removed, a reboot is required; the number of FCoE interfaces is set to 0 and all FCoE
interfaces are deleted.
Upgrades and downgrades are supported only to or from an adjacent release, respectively.
The following additional issues for upgrades and downgrades apply:
Upgrades
• The value of enodes-config is set by default to local in the fabric map.
• On nodes with an FCoE license:
‐ The default value of 64 is set for fcoe-enodes in the RBridge ID context of the running
configuration.
‐ If a node has more than 64 static or dynamic bindings, the value of fcoe-enodes is reduced
to as many bindings as are present, and the value is updated in the running configuration.
FCoE queuing
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