Table 5 Troubleshooting - Dell PowerEdge M420 Administrator's Manual

Troubleshooting
This appendix provides troubleshooting instructions.
TABLE 5
Troubleshooting
Problem Cause
NPIV disabled on Edge Inadvertently turned off
switch ports
LUNs are not visible Zoning on fabric switch is incorrect.
Port mapping on the NPIV Switch is
incorrect.
Cabling not properly connected.
Failover is not working Failover disabled on external port
(N_Port).
Dell 8/4Gbps FC SAN Module Administrator's Guide
53-1001345-01
Solution
On the Edge switch, enter the portCfgShow command.
Verify that NPIV status for the port to which FC SAN Module is
connected is ON.
If the status displays as "--" NPIV is disabled. Enter the
portCfgNpivPort port_number command with the 1 operand to enable
NPIV.
Repeat this step for each port as required.
Verify zoning on the Edge switch.
Verify that internal ports (F_Ports) are mapped to an online external
port (N_Port).
Perform a visual inspection of the cabling, check for issues such as
wrong ports, twisted cable, or bent cable. Replace the cable and try
again. Ensure the internal port on the FC SAN Module is enabled and
active.
Verify that the failover and failback policies are enabled, as follows:
Enter the ag failoverShow command with the port_number
--
operand.
Enter the ag failbackShow command with the port_number
--
operand.
Command returns "Failback (or Failover) on N_Port port_number is
supported."
If it returns, "Failback (or Failover) on N_Port port_number is not
supported." See "Adding a preferred secondary external port
(N_Port)" on page 21.
Appendix
A
29