Dell Brocade G620 Brocade 8.0.1 Fabric OS Troubleshooting and Diagnostics Guid - Page 37

Connection problems, Checking the physical connection

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Connectivity Symptom Probable cause and recommended action Port LEDs are steady. The color of the port LED is important in this instance. To determine what is happening on either your port status LED or power status LED, refer to that switch's model hardware reference manual. There is a table that describes the purpose of the LEDs and explains the current behavior as well as suggested resolutions. Symptom Probable cause and recommended action No light from the port LEDs. If there is no light coming from the port LED, then no signal is being detected. Check your cable and SFP to determine the physical fault. Connection problems Determine if the problem is the target or the host, then continue to divide the suspected problem-path in half until you can pinpoint the problem. One of the most common solutions is zoning. Verify that the host and target are in the same zone. For more information on zoning, refer to Zoning on page 75. Checking the physical connection ∙ Check the cables running to and from the host and storage to the switch. This path includes the patch panel. Verify that none of the cables are damaged, including indentations or bent cable. ∙ Check the SFP on the HBAs and switches. Verify that they are known to be in good working condition. You can do this by swapping the current SFP with a known working SFP. ∙ Clean the optics. There are many kits on the market for cleaning fiber optics. You want to find a product that does not leave residue either from a lint-free wipe or from the solvent. Checking the logical connection 1. Enter the switchShow command. 2. Review the output from the command and determine if the device successfully logged in to the switch. ∙ A device that is logically connected to the switch is registered as an F_Port, L_Port, E_Port, EX_Port, VE_Port, VEX_Port, or N_Port. ∙ A device that is not logically connected to the switch is registered as a G_Port or U_Port, if NPIV is not on the switch. 3. Enter the slotShow -m command to verify that all blades are enabled and not faulty, disabled, or in some other non-available state. 4. Perform the appropriate actions based on how your missing device is connected: ∙ If the missing device is logically connected, proceed to the next troubleshooting procedure (Checking the Name Server on page 38). Brocade Fabric OS Troubleshooting and Diagnostics Guide 53-1004126-01 37

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Symptom
Port LEDs are steady.
Probable cause and recommended action
The color of the port LED is important in this instance. To determine what
is happening on either your port status LED or power status LED, refer to
that switch’s model hardware reference manual. There is a table that
describes the purpose of the LEDs and explains the current behavior as
well as suggested resolutions.
Symptom
No light from the port LEDs.
Probable cause and recommended action
If there is no light coming from the port LED, then no signal is being
detected. Check your cable and SFP to determine the physical fault.
Connection problems
Determine if the problem is the target or the host, then continue to divide the suspected problem-path in half until you can pinpoint the
problem. One of the most common solutions is zoning. Verify that the host and target are in the same zone. For more information on
zoning, refer to
Zoning
on page 75.
Checking the physical connection
∙
Check the cables running to and from the host and storage to the switch.
This path includes the patch panel. Verify that none of the cables are damaged, including indentations or bent cable.
∙
Check the SFP on the HBAs and switches.
Verify that they are known to be in good working condition. You can do this by swapping the current SFP with a known working
SFP.
∙
Clean the optics.
There are many kits on the market for cleaning fiber optics. You want to find a product that does not leave residue either from a
lint-free wipe or from the solvent.
Checking the logical connection
1.
Enter the
switchShow
command.
2.
Review the output from the command and determine if the device successfully logged in to the switch.
∙
A device that is logically connected to the switch is registered as an F_Port, L_Port, E_Port, EX_Port, VE_Port, VEX_Port,
or N_Port.
∙
A device that is
not
logically connected to the switch is registered as a G_Port or U_Port, if NPIV is not on the switch.
3.
Enter the
slotShow -m
command to verify that all blades are enabled and not faulty, disabled, or in some other non-available
state.
4.
Perform the appropriate actions based on how your missing device is connected:
∙
If the missing device is logically connected, proceed to the next troubleshooting procedure (
Checking the Name Server
on
page 38).
Connectivity
Brocade Fabric OS Troubleshooting and Diagnostics Guide
53-1004126-01
37