director 2/64 service manual

1–6 director 2/64 service manual
General Information
— 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 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
time-out value (R_A_TOV) or error-detect time-out 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.