Dell Brocade 6520 Command Reference Supporting Fabric OS v7.1.0 - Page 334

2 fcPing NOTES OPERANDS Logical Fabrics: When executed in a Logical Fabric from a switch to a destination device connected through the base fabric, SuperPing exercises all paths in the base fabric along with the ISLs in the logical fabric. The path output indicates the LISLs and the base switch. Refer to the Examples section for an illustration. The ELS Echo may not be supported on all devices. In such cases, the response could be either an ELS reject or a request timeout. By default, fcPing sends five ELS Echo requests to each port. When a device does not respond to the ELS Echo request, further debugging may be needed to determine, whether the device does not support ELS Echo, or whether the request is rejected for some other reason. Do not assume that the device is not connected. The execution of SuperPing requires that all switches in the fabric run Fabric OS v6.4.0 or later. For switches running earlier versions of Fabric OS, the collected data is incomplete. If a fabric reconfiguration occurs while SuperPing is in progress, the command reports an error message. Exit the command and rerun the test after the fabric becomes stable again. The execution of this command is subject to Virtual Fabric or Admin Domain restrictions that may be in place. Refer to Chapter 1, "Using Fabric OS Commands" and Appendix A, "Command Availability" for details. This command has the following operands: destination Specifies the destination as follows. • When using fcPing between a source and a destination, specify the destination as port WWN or a node WWN. • When using fcPing to ping a single device, specify the destination as a PID, a switch WWN, a domain ID, or a switch domain controller ID. • When using fcPing with the --allpaths option, specify the destination as a PID, a switch WWN, or a domain ID. source Specifies the source port ID, port WWN, or node WWN. This operand is optional; it is not valid with the SuperPing command (--allpaths). The following operands are valid only when fcPing is executed without the --allpaths option (legacy mode): --number frames Specifies the number of ELS Echo requests to send. The default value is 5. --length size Specifies the frame size of the requests in bytes. The default value is 0. Without data, the Fibre Channel Echo request frame size is 12 bytes. The total byte count includes four bytes from the Echo request header and eight bytes from the timestamp. The maximum allowed value is 2,036 bytes. The length must be word-aligned. --interval wait Specifies the interval, in seconds, between successive ELS Echo requests. The default value is 0 seconds. --pattern pattern Specifies up to 16 "pad" bytes, which are used to fill out the request frame payload sent. This is useful for diagnosing data-dependent problems in the fabric link. The pattern bytes are specified as hexadecimal characters. For example, --pattern ff fills the request frame with instances of the number 1. If a non-byte-aligned pattern is specified, the upper nibble of the last pattern byte is filled with zeros. For example, --pattern 123 fills the payload with a pattern of 0x1203. 306 Fabric OS Command Reference 53-1002746-01