Dell VA-40FC Service Manual download pdf (Page 24)

Fabric OS v6.4.1 Release Notes v1.0 Page 24 of 62

FCoE/CEE (Brocade 8000 and FCOE10-24)

• The Brocade 8000 balances the FCoE bandwidth across all six port groups (each port group

contains four ports). To get optimum performance for FCoE traffic it is recommended that the

user distribute server CNA connections across these six port groups.

• Hot plugging a CP with firmware level less than FOS v6.3.0 into a DCX or DCX-4S with an active

FCOE10-24 blade will result in the new standby CP not coming up.

• Brocade recommends that Converged Mode be enabled on all interfaces connected to CNAs.

• When operating in Converged Mode, tagged traffic on the native VLAN of the switch interface is

processed normally. The host should be configured not to send VLAN tagged traffic on the

switch’s native VLAN.

•

When operating in Converged Mode, tagged frames coming with a VLAN tag equal to the

configured native VLAN are dropped.

• The Converged Network Adapter (CNA) may lose connectivity to the Brocade 8000/FCOE10-24 if

the CNA interface is toggled repeatedly over time. This issue is related to the CNA and rebooting

the CNA restores connectivity.

•

Although the Brocade 8000 and FCOE10-24 support the configuration of multiple CEE maps, it is

recommended to use only one CEE map on all interfaces connected to CNAs. Additionally, CEE

maps are not recommended for use with non-FCoE traffic. QoS commands are recommended for

interfaces carrying non-FCoE traffic.

•

It is recommended that Spanning Tree Protocol and its variants be disabled on CEE interfaces that

are connected to a server.

•

The Fabric Provided MAC Address (FPMA) and the Fibre Channel Identifier (FCID) assigned to a

VN_Port cannot be associated with any single front-end CEE port on which the FLOGI was

received.

• LLDP neighbor information may be released before the timer expires when DCBX is enabled on a

CEE interface. This occurs only when the CEE interface state changes from active to any other

state. When the DCBX is not enabled, the neighbor information is not released until the timer

expires, irrespective of the interface state.

• The FCoE Login Group Name should be unique in a fabric wide FCoE Login Management

Configuration. The merge logic is designed to modify the Login Group Name during merge when

00051E is being used by Brocade, while assigning the WWNs to 8000s, DCXs and DCX4Ss, which

would make only the last 3 bytes as different for any two 8000s, DCXs or DCX4Ss. Considering

this assignment method, the merge logic would rename the login group by including the last 3

bytes of WWN in the login group name, so that they are unique in the merged configuration.

• For switches having different OUI indices from the 8 assigned to Brocade (for ex: 00051E and

006069), WWNs can differ in more than 3 bytes. In this case, after normal merge and a rename

as per above described logic, login group names can be the same for WWNs differing only in OUIs.

The merge logic would drop one of the Login Groups to satisfy the requirement to keep the Login

Group Name unique in the fabric wide configuration.

• Ethernet switch services must be explicitly enabled using the command “fosconfig –enable ethsw”

before powering on an FCOE10-24 blade. Failure to do so will cause the blade to be faulted (fault

9). Users can enable ethsw after upgrading firmware without FC traffic interruption.

• The Brocade 8000 does not support non-disruptive hot code loads (HCL). Upgrading the Brocade

8000 to FOS 6.4 or downgrading from v6.4 is disruptive to the IO through the switch.

• A code load on a DCX or DCX-4s with one or more FCOE10-24 blades will disrupt the traffic going

through those FCOE10-24 blades.

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Dell VA-40FC Service Manual Page 24

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