Hardware Components - HP StorageWorks Director 2/140 Installation Manual

• Fabric A unzoned and Fabric B unzoned—The fabrics join successfully, and the resulting
fabric remains unzoned.
• Fabric A zoned and Fabric B unzoned—The fabrics join successfully, and fabric B
automatically inherits the zoning configuration from fabric A.
• Fabric A unzoned and Fabric B zoned—The fabrics join successfully, and fabric A
automatically inherits the zoning configuration from fabric B.
• Fabric A zoned and Fabric B zoned—The fabrics join successfully only if the zone
configurations can be merged. If the fabrics cannot join, the connecting E_Ports segment and
the fabrics remain independent.
Zone configurations for two fabrics are compatible (the zones can join) if the active zone set
name is identical for each fabric, and if zones with the same name have identical elements.
• Port segmentation—When an ISL activates, directors exchange operating parameters to
determine if they are compatible and can join to form a single fabric. If they are incompatible,
the connecting E_Port at each director segments to prevent the creation of a single fabric. A
segmented link transmits only Class F traffic; the link does not transmit Class 2 or Class 3 traffic.
The following conditions cause ports to segment:
• Incompatible operating parameters—Either the resource allocation timeout value (R_A_TOV)
or error detect timeout value (E_D_TOV) is inconsistent between directors. To prevent E_Port
segmentation, the same E_D_TOV and R_A_TOV must be specified for each director.
• Duplicate domain IDs—One or more domain ID conflicts are detected.
• Incompatible zoning configurations—Zoning configurations for the directors are not
compatible.
• Build fabric protocol error—A protocol error is detected during the process of forming the
fabric.
• No principal switch—No director in the fabric is capable of becoming the principal switch.
• No response from attached switch—After a fabric is created, each director in the fabric
periodically verifies operation of all attached switches and directors. An ISL segments if a
switch or director does not respond to a verification request.
• ELP retransmission failure timeout—A director that exhibits a hardware failure or connectivity
problem cannot transmit or receive Class F frames. The director did not receive a response to
multiple exchange link protocol (ELP) frames, did not receive a fabric login (FLOGI) frame,
and cannot join an operational fabric.

Hardware components

The director provides a modular design that enables quick removal and replacement of FRUs. The
following sections define Director 2/140 main components.
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