Fcping - Brocade Communications Systems Brocade 8/12c Command Reference Manual

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fcPing

fcPing
Sends a Fibre Channel Extended Link Service (ELS) Echo request to a pair of ports or to a single
destination, or executes a SuperPing.
SYNOPSIS
fcping
[--number frames]
[--length size]
[--interval wait]
[--pattern pattern]
[--bypasszone]
[--quiet]
[source] destination
fcping --allpaths
[-printisl]
[-maxtries M]
[-covcount N]
[-delay D]
[-framelength len]
destination
fcping --help
DESCRIPTION
Use this command to send a Fibre Channel ELS Echo request to a pair of ports (a source and a
destination), to a single device, or to execute a SuperPing that exercises all interswitch links (ISLs) and
internal links in different paths that route to the destination device.
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When you use fcPing with a source and a destination, the command performs a zoning check
between the two ports. In addition, two Fibre Channel ELS requests are generated. The first ELS
request is from the domain controller to the source port identifier. The second ELS request is from
the domain controller to the destination port identifier. The ELS Echo request elicits an ELS Echo
response from a port identifier in the fabric and is useful for validating link connectivity.
The source and destination port identifiers can be specified as a 24-bit Fibre Channel port identifier
(PISD), a port World Wide Name, or a node World Wide Name. The two port identifiers are then
used to determine if the identifiers are zoned together.
When you use fcPing to probe a single destination, an ELS Echo is sent to the specified destination
and a response obtained. The destination can be a switch WWN, a domain ID, or a switch domain
controller ID. No zoning check is performed when a single device is probed.
When you use fcPing with the --allpaths option, the command exercises a "SuperPing." A
SuperPing exercises all ISLs and the internal links included in the paths that route to the destination.
It collects statistical data of all the covered paths and their port and provides optional parameters to
selectively display the data. SuperPing takes only one argument, that is, the destination port
identifier. To execute a SuperPing for two destination, you must issue the fcping --allpaths
command separately for each destination.
SuperPing facilitates troubleshooting of links that experience problems. When an echo frame is
dropped, all the ISLs and internal links potentially traversed by this frame are marked as failures. If a
fabric topology is considered fully redundant, that is, at each hop there are multiple paths to reach a
destination, a high percentage of errors are recorded on the link that experiences errors.
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.
Fabric OS Command Reference
53-1001764-01