Dell Brocade 6520 Command Reference Supporting Fabric OS v7.1.0 - Page 186

2 configure WWN Based persistent PID When enabled, this feature supports both dynamic and static WWN-based PID assignment. In dynamic PID binding, the first area assigned to a device when it logs in is bound to the device WWN and remains persistent through subsequent logins. Every time the device logs into the switch, it is guaranteed to get the same PID. Alternately, you can use the wwnAddress command to create a static WWN-based PID assignment. In either case, the WWN-based persistent PID feature must be enabled through configure. The feature is disabled by default; it is dependent on Dynamic Area Mode being enabled. Allow XISL Use An extended interswitch link (XISL) is an interswitch link (ISL) that connects the logical switch to the base switch and carries traffic for multiple logical fabrics. This feature is supported only on Virtual Fabric-aware platforms under the following conditions: Virtual Fabrics must be enabled on the switch, and the switch cannot be a base switch. In addition, on the Brocade DCX, DCX-4S, DCX 8510-8, and DCX 8510-4 the switch cannot be a default switch or include interchassis link (ICL) ports. This feature is enabled by default (yes=enabled). On the Brocade 5100, 5300, VA-40FC, and 6510 default switch, the feature is disabled by default (no=disabled). Beginning with Fabric OS v7.0.0, the XISL feature is supported on the Brocade extension blade (FX8-24). You do not need to disable the logical switch before changing the value of this parameter. Turning off XISL use requires confirmation because all LISLs will be removed upon execution. If the logical switch is enabled and is part of an edge fabric connected to an FCR, this parameter cannot be turned on. If the logical switch is disabled or it is not yet part of an edge fabric, this parameter can be turned on. However, execution may cause edge fabric segmentation if the EX_Port connected to the edge fabric is disabled while the logical switch is enabled or connected to the edge fabric. The Brocade 7800 VF configuration does not support XISL usage and therefore this option is not available on this logical switch. Disable FID Check If fabric ID (FID) check is disabled, the fabric ignores the Fabric Identifier conflict with the neighboring switch during fabric formation. By default, FID check is enabled. If the fabric detects a FID conflict, it disables the E_Port with a "Fabric ID conflict" message. This parameter is configurable only if the switch is Virtual Fabric-aware and Virtual Fabric is enabled on the switch. Enable 256 Area limit The 256 area limit allows the partition to be configured for 8-bit addressing rather than the default 10-bit addressing. Each port in this partition is given a unique area represented by the middle 8 bits of the PID. Valid values include the following: 0 No limit is imposed on the area. This is the default value. The partition is configured for 10-bit addressing and supports up to 1800 ports. 1 The unique area assignments begin at zero regardless of where the port is physically located. This allows FICON users to make use of high port count port blades with port indexes greater than 256. 2 The unique area assignments are based on the port index. This mode does not allow FICON users to make use of ports with an index greater than 256 (high ports of a high port count blade), but this mode is compatible with domain-index zoning. This parameter is configurable only if the switch is Virtual Fabric-aware and Virtual Fabric is enabled on the switch. 158 Fabric OS Command Reference 53-1002746-01