Dell PowerEdge M420 8/4 Gbps FC SAN Module Administrator's Guide - Page 43

Troubleshooting, Appendix

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Troubleshooting Appendix A This appendix provides troubleshooting instructions. TABLE 5 Problem Troubleshooting Cause NPIV disabled on Edge switch ports Inadvertently turned off 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). 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. Dell 8/4Gbps FC SAN Module Administrator's Guide 29 53-1001345-01

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Dell 8/4Gbps FC SAN Module Administrator’s Guide
29
53-1001345-01
Appendix
A
Troubleshooting
This appendix provides troubleshooting instructions.
TABLE 5
Troubleshooting
Problem
Cause
Solution
NPIV disabled on Edge
switch ports
Inadvertently turned off
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.
LUNs are not visible
Zoning on fabric switch is incorrect.
Port mapping on the NPIV Switch is
incorrect.
Cabling not properly connected.
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.
Failover is not working
Failover disabled on external port
(N_Port).
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.