Brocade Fabric OS v6.4.3f Release Notes v1.0

Fabric OS v6.4.3f Release Notes v1.0 Page 31 of 149
10G Interoperability
 10G interop between FC10-6 and McDATA blades is not supported due to a HW limitation, however
the FC10-6 is supported in a chassis running in Interopmode 2 or 3 (FC10-6 to FC10-6 connections
only). An FC10-6 blade will not synchronize with a McDATA 10G blade. However, the inability to
synchronize will not negatively impact the system.
Port Fencing
 The state changes counter used by Fabric Watch in FOS v6.3 has been updated to ignore any toggling
of F-ports due to planned internal mechanisms such as throttling and trunking. There are some FOS
CLI commands such as portcfgspeed, portCfgTrunkPort etc that implicitly disable/enable ports after
configuration.
 The Port Fencing feature is not supported for Loss of Sync (LOS) and Link Failure (LF) areas of Port/F-
port/E-port classes. State change area can be used in place of LOS/LF areas for Port Fencing.
Zoning
 If the default zoning mode is set to All Access and more than 120 devices are connected to the fabric,
you cannot enable All Access.
 Beginning with the FOS v6.2.0 release, all WWNs containing upper-case characters are automatically
converted to lower-case when associated with a zone alias and stored as part of a saved configuration
on a switch. For example, a WWN entered as either “AA.BB.CC.DD.EE.FF.GG.HH” or
“aa.bb.cc.dd.ee.ff.gg.hh” when associated with a zone alias will be stored as “aa.bb.cc.dd.ee.ff.gg.hh”
on a switch operating with FOS v6.2.0 or later.
This behavioral change in saved zone alias WWN members will not impact most
environments. However, in a scenario where a switch with a zone alias WWN member with upper case
characters (saved on the switch with pre-FOS v6.2.0 code) is merged with a switch with the same alias
member WWN in lower case characters, the merge will fail, since the switches do not recognize these
zoning configurations as being the same.
For additional details and workaround solutions, please refer to the latest FOS Admin Guide updates
or contact Brocade Customer Support.
ICLs
 If a DCX with an 8-link ICL license is connected to a DCX with a 16-link license, the DCX with the 16-
link license will report enc_out errors. The errors are harmless, but will continue to increment. These
errors will not be reported if a DCX with a 16-link license is connected to a DCX-4S with only 8-link ICL
ports.
 If ICL ports are disabled on only one side of an ICL link, the enabled side may see enc_out errors.
AP 7420 Interoperability (refer to Defect 307117)
 A switch running FOS v6.4 cannot connect to an E_Port on an AP7420.
 An AP7420 can form a direct ISL connection with a switch running FOS v6.3 or lower version of FOS
firmware. A switch running FOS v6.4 can still participate in a fabric with an AP7420 as long as the
AP7420 is not directly connected to the FOS v6.4 switch.
 A switch running FOS v6.4 in InteropMode 0 (Brocade Native Mode) cannot connect to an EX_Port on
an AP7420. A switch running FOS v6.4 in InteropMode 2 or InteropMode 3 can be connected to EX
ports on an AP7420.
Extended Fabrics and R_RDY Flow Control
Beginning with Fabric OS v5.1, Brocade supported the Extended Fabrics feature in conjunction with
R_RDY flow control (R_RDY flow control mode can be enabled via portCfgISLMode command). R_RDY