HP Cisco MDS 9020 Cisco MDS 9000 Family Command Reference - Cisco MDS SAN-OS R - Page 1018

system health internal-loopback Chapter 21 S Commands Send documentation comments to [email protected] system health internal-loopback To explicitly run an internal Online Health Management System (OHMS) loopback test on demand (when requested by the user) for a specified interface or module, use the system health internal-loopback command. system health internal-loopback interface {fc slot/port | iscsi slot/port} [frame-length bytes [frame-count number] | frame-count number] Note On a Cisco Fabric Switch for HP c-Class BladeSystem and on a Cisco Fabric Switch for IBM BladeCenter, the syntax differs as follows: interface {bay port | ext port} Syntax Description interface fc slot/port iscsi slot/port bay port | ext port frame-length bytes frame-count number Configures an interface. (Optional) Configures the Fibre Channel interface specified by the slot and port on an MDS 9000 Family switch. (Optional) Specifies the iSCSI interface to configure by slot and port on an MDS 9000 Family switch. (Optional) Configures the Fibre Channel interface on a Cisco Fabric Switch for HP c-Class BladeSystem or on a Cisco Fabric Switch for IBM BladeCenter . The range is 0 to 48. Configures the specified length of the loopback test frame in bytes. The range is 0 to 128 bytes. Configures the specified number of frames for the loopback test. The number of frames can range from 1 to 32. Defaults The loopback is disabled. The frame-length is 0. The frame-count is 1. Command Modes EXEC mode. Command History Release 1.3(4) 3.0(1) 3.1(2) Modification This command was introduced. Added the frame-count and frame-length options. Added the interface bay | ext option. Usage Guidelines Internal loopback tests send and receive FC2 frames to and from the same ports and provide the round trip time taken in microseconds for the Fibre Channel interface. 21-100 Cisco MDS 9000 Family Command Reference OL-16217-01, Cisco MDS SAN-OS Release 3.x