Brocade Adapters Troubleshooting Guide 5153-1002145-01Adapter driver installation verification 2Common link problems can be caused by the following:• Damaged cables. (Note that damaged cables can also cause errors and invalid data on links.)• Cables that are not rated or compatible with adapter port speeds. Refer to cable specificationsin the Brocade Adapters Installation and Reference Manual.• Faulty switch or adapter SFPs. Verify if an SFP is the problem by connecting a different link tothe adapter port or, if convenient, replace the cable with a cable of known quality. If the errorsor invalid data on the link still indicate a cable problem, the SFP may be faulty. Try replacing theSFP.• SFP issues on the adapter or switch. For example, the SFP may not be compatible with theadapter, but is compatible with the switch, or vice versa. SCSI retries and time-outs determinecommunication between the adapter and storage. Dropped packets cause time-outs, andpackets can drop because of SFP issues. Run the BCU port -stats command to display portstatistics, and look for errors and dropped frames.Table 3 lists HCM options and BCU commands, as well as Fabric OS commands that you can use todetermine link status.Adapter driver installation verificationProblems with adapter operation may be due to improper hardware or software installation,incompatibility between the adapter and your host system, unsupported SFPs installed on theadapter, improper cable connected to the fabric, or the adapter not operating within specifications.Determine if problems may exist because of these factors by reviewing your installation withinformation in the Brocade Adapters Installation and Reference Manual listed in Table 4.TABLE 3 Tools to determine link statusApplication Tool ReferencesHCM • Port Statistics• Loopback and PCI loopback test• Fibre Channel ping, echo, and trace routetests• Link Beaconing• Port Properties• SFP informationChapter 3, “Tools for CollectingData”BCU • fcdiag and diag commands.• Port commands, such as port --stats. port--list, and port --query.Chapter 3, “Tools for CollectingData”Switch Fabric OS • switchShow• portShow• portStatsShow• portErrShow• fcpProbeShow• fPortTest• Chapter 3, “Tools for CollectingData”• Fabric OS Administrator’sGuide• Fabric OS Troubleshooting andDiagnostics Guide
