Brocade Fabric OS v7.2.0d Release Notes v1.0

Fabric OS v7.2.0d Release Notes v1.0 Page 49 of 52
Area
Comments
FCIP
When performing multiple cabling changes to the SAN fabric in a FICON Emulating
FCIP Tunnel configuration with the Brocade 7800 or FX8-24 blade, either disable
all of the FCIP Tunnels or issue the switch disable command on all FCIP
interconnected switches to avoid IFCCs in a mainframe environment. Issuing either
a switch disable or an FCIP Tunnel disable command will allow the FCIP FICON
Emulation processing state-machine to execute an orderly cleanup process and
allow normal activation of the new configuration. When all cabling and Traffic
Isolation Zone manipulations have been completed, enable the switches or the
FCIP Tunnels.
FCIP
A disabled XGE or GE port will be re-enabled after a code upgrade/downgrade. To
prevent XGE/GE ports from being re-enabled after a code load they should be
persistently disabled.
Firmware Downloads
Firmware upgrades for FICON are only supported from FOS v7.1.0c or FOS
v7.2.0b
i
.
When performing non-disruptive upgrade from v7.2.0b to this version, deactivate
or delete flow mirrors before starting firmware upgrade. Presence of Flow mirrors
with traffic being mirrored might cause IFCCs.
Firmware Downloads
Non-disruptive Hot Code Load is only supported on director class switches (DCX,
DCX-4S, DCX8510-8, and DCX8510-4). Comprehensive non-disruptive Hot Code
Load is not supported on the 7800 or a DCX, DCX-4S, DCX8510-8, or DCX8510-4
with an FX8-24 blade since the FCIP tunnels will go down for 10-15 seconds and
all traffic in the tunnels will be disrupted. IFCCs may result if traffic is not stopped
while downloading firmware.
Firmware Downloads
The CUP device must be varied offline to all MVS partitions before starting a code
load. The CUP device can be varied back online after the code load completes.
Failure to vary off the CUP devices may result in missing interrupt.
Firmware Downloads
When downgrading v7.2.0d to v7.1.0c, ICL ports might go down with port status
In_Sync or Port_Flt when FMS mode is turned on and XISLs are configured.
Contact device support to get a special version of FOS v7.1.0c for downgrading
from v7.2.0d to v7.1.0c in this scenario.
Interoperability
When connecting an 8G or 16G capable port in a Brocade switch to an IBM
Virtualization Engine TS7700 with R1.6 or below, the port must be configured to a
minimum of 16 buffers to avoid IFCCs at the channel and loss of FICON paths to
the control unit. This requires the Extended Fabric license on the Brocade switch.
The recommended best practice is to upgrade the TS7700 to R1.7 or higher and
leave the BB credits of the switch port at the default setting of 8.
Contact TS7700 device support to determine proper settings of your device.