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Figure 8 Example of B-series loginshow output
Figure 9 Example of C-series show interface output
3. Observe the CN switch and CNA link error counters.
If any of these steps detect errors, the most likely causes are incompatible or faulty cables, SFPs,
or CN switch ports. Cable or SFP problems can cause a wide range of symptoms from solid to
intermittent and even performance issues. The FCoE switch port and CNA port error counters are
good indications of potential intermittent and performance problems.
Verify Fibre Channel switch zoning for FC storage
Verify that the Fibre Channel zoning and the CNA port WWNs match those displayed by the
CNA.
Verify Fibre Channel storage device discovery
After verifying startup BIOS message, link, and zoning, verify that the CNA can discover the
configured Fibre Channel storage devices.
• The first level of CNA Fibre Channel storage device discovery is performed at the BIOS level
using the OneConnect FCoE BIOS utility. Use this utility (see “CNA startup BIOS message”
Isolating CNA problems 15