HP Surestore 64 FW 05.01.00 and SW 07.01.00 Director 2/64 Installation Guide ( - Page 26

Duplicate domain IDs, Build fabric protocol error

Page 26 highlights

Overview ■ 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. 26 Director 2/64 Installation Guide

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Overview
26
Director 2/64 Installation Guide
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.