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
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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