HP 1606 HP B-series Fabric OS 6.4.1b Release Notes (5697-0886, March 2011-incl - Page 33

There are some Fabric OS CLI commands, such as portcfgspeed and portCfgTrunkPort, 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. NOTE: For more information on Port Fencing functionality, see the Brocade Fabric Watch Administrator's Guide for v6.4.0. 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 Fabric OS 6.2.0 release, all WWNs containing uppercase characters are automatically converted to lowercase 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 Fabric OS 6.2.0 or later. This behavioral change in saved zone alias WWN members does not impact most environments. However, in a scenario where a switch with a zone alias WWN member with uppercase characters (saved on the switch with pre-Fabric OS 6.2.0 code) is merged with a switch with the same alias member WWN in lowercase characters, the merge fails, since the switches do not recognize these zoning configurations as being the same. For additional details and workaround solutions, see the latest Fabric OS Administrator Guide updates. ICLs • If a DC SAN Director with an 8-link ICL license is connected to a DC SAN Director with a 16-link license, the DC SAN Director with the 16-link license reports enc_out errors. The errors are harmless, but continue to increment. These errors are not reported if a DC SAN Director with a 16-link license is connected to a DC04 SAN Director 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. Extended Fabrics and R_RDY flow control Starting with Fabric OS 5.1, the Extended Fabrics feature is supported with R_RDY flow control. (R_RDY flow control mode can be enabled using the portCfgISLMode command.) R_RDY flow control mode that uses IDLE primitives does not support frame-based trunking for devices such as Time Division Multiplexor (TDM). To overcome this limitation and provide support for frame-based trunking with Extended Fabrics, Fabric OS 6.2.x and later has been enhanced to support interoperability with these distance extension devices. Fabric OS 6.3.0 and later allows Extended Fabrics E_Ports to operate in VC_RDY mode using either ARB or IDLE primitives as fill words. This allows frame-based trunking to be supported on Extended Fabrics E_Ports even when IDLE primitives are configured for these ports when operating in native VC_RDY mode. Prior to this change, frame-based trunking was supported only when ARB primitives were used in VC_RDY mode. With Fabric OS 6.2.x, frame-based trunking is supported on Extended Fabrics E_Ports even if IDLE or ARB primitives are used when operating in native VC_RDY mode. Implementation The portcfglongdistance CLI parameter VC Translation Link Init is now overloaded to specify whether the long-distance link should use IDLE or ARB primitives. By default vc_init Important notes and recommendations 33