MAP7011 Private network isolation procedure 11

1. Locate the Ethernet switch SW1 (black network) at the rear of the storage facility that contains the failing management console. See Figure 1 for 16-port switches and Figure 2 and Figure 3 for 8-port switches.
   Is the Ethernet switch powered on?

   Note: If this management console is an external management console, then go to the storage facility to which the management console is cabled.

   • Yes, continue with the next step.
   • No, go to MAP2350 Ethernet switch power problem.
   Figure 1. 16-port Ethernet switch port designations (SW1, SW2 - Tx) - Models 921/931, 922/932, 9A2/9B2

   
   Figure 2. 8-port Ethernet switch port designations (SW1, SW2-Tx) Models 921/931, 922/932, 9A2/9B2

   
   Figure 3. 8-port Ethernet switch port designations (SW1, SW2-Tx) Model 941 and 951

   
2. Select the type of Ethernet switches in the affected storage facility:
   • 16-port Ethernet switches, go to step 3.
   • 8-port Ethernet switches, go to step 5.
3. Observe the 16-port Ethernet switch port LEDs for the failing management console link (SW1-T1 for HMC1 or SW1-T2 for HMC2). See Figure 1.

   See Table 1 for a description and interpretation of the Ethernet Switch port LEDs.

   Table 1. 16-port Ethernet switch port LED descriptions

   LED	State	Meaning
   Upper	On	1000 Mb/s connection
   	Off	100 Mb/s connection (Normal for FSP connection only)
   Lower	Off	No link
   	On	Link, No Activity
   	Flashing	Link, Activity

   There are two LEDs for each port.

   Is the lower Link LED lit solidly or flashing?

   • Yes, continue with step 8.
   • No, continue with the next step.
4. Temporarily move the Ethernet cable to an unused port on the same switch. Observe the Ethernet switch port LEDs corresponding to the new location.
   Is the lower Link LED lit solidly or flashing?

   • Yes, apparently the Ethernet switch is failing. Move the Ethernet cable back to its original port and then go to MAP7011 Section-5.
   • No, move the Ethernet cable back to its original port and go to step 8.
5. Observe the 8-port Ethernet switch port LEDs for the failing management console link (SW1-T1 for HMC1 or SW1-T2 for HMC2). See Figure 2.
   • When viewed from the rear of the rack, the Ethernet ports are numbered 1 - 8 from right to left. The LED indicator for each port is on the top front edge of the switch and are also numbered T1 to T8 from right to left.
   • See Table 2 for a description and interpretation of the 8-port Ethernet switch port LEDs.

   Table 2. 8-port Ethernet switch port LED description

   LED	State	Meaning
   Blue port LED	Off	No link
   	On	Link, No Activity
   	Flashing	Link, Activity

   Is the blue port LED lit solidly or flashing?

   • Yes, continue with step 8.
   • No, continue with the next step.
6. Is there an unused port on the same switch?
   • Yes, go to the next step.
   • No, temporarily unplug the cable from port T8, and then continue with the next step.
     Note: For models 9A2 and 9B2, unplugging the cable might cause a new serviceable event to be opened for Ethernet communications from the second LPAR on this CEC enclosure. After this cable is reconnected in the following step, you can close that serviceable event.
7. Temporarily move the Ethernet cable to an unused port on the same switch. Observe the Ethernet switch port LEDs corresponding to the new location.
   Is the port LED lit solidly or flashing?

   • Yes, apparently the Ethernet switch is failing. Move the Ethernet cable back to its original port. If you unplugged the cable from T8 to create an unused port, then reconnect that cable now. Then, go to MAP7011 Section-5.
   • No, move the Ethernet cable back to its original port and continue with the next step.
8. Select the step that applies to your management console:
   1. If you have an xSeries x335, x336, or x3550 server, go to the next step.
   2. If you have a ThinkPad W500 laptop, go to step 11.
   3. If you have a ThinkPad laptop, go to step 12.
9. Observe the eth0 link status LED on the rear of the failing management console. See Figure 4 (X335 server) or Figure 5 (X336 server) or Figure 6 (X3550 server).
   Is the eth0 Link Status LED lit?

   • Yes, continue with MAP7011 Section-2.
   • No, continue with the next step.
   Figure 4. LEDs on the rear of the X335 management console server

   
   Figure 5. LEDs on the rear of the X336 management console server

   
   Figure 6. LEDs on the rear of the X3550 management console server

   
10. Move the Ethernet cable from eth0 to eth1. See Figure 7 (X335 server) or Figure 10 (X336 server) or Figure 11 (X3550 server).
    Is the eth1 Link Status LED lit?

    • Yes, apparently the management console Ethernet port is failing. Restore the Ethernet cables to their original positions and continue with MAP7011 Section-3.
    • No, apparently the Ethernet cable between the management console and Ethernet switch is failing. Go to MAP7011 Section-6 to replace the cable.
    Figure 7. Ethernet connectors on the rear of the X335 management console server

    
    Figure 8. Ethernet connectors on the rear of the X336 management console server

    
    Figure 9. Ethernet connectors on the rear of the X336 management console server

    
    Figure 10. Ethernet connectors on the rear of the X336 management console server

    
    Figure 11. Ethernet connectors X3550 management console server (rear view)

    
11. Observe the eth0 USB Ethernet 100/ACT LED indicator. See Figure 14.
    • The eth0 USB Ethernet adapter USB cable connects to the ThinkPad W500 as shown in Figure 13.
    • The USB and Ethernet cables that connect to the eth0 adapter are black. See Figure 12.
    Figure 12. eth0 (black network) and eth3 (gray network) USB Ethernet adapters for Thinkpad W500 (similar for Thinkpad T510, T520)

    
    Figure 13. Ethernet connector eth0 for laptop management console (rear view)

    
    Figure 14. USB Ethernet adapter LED indicators

    

    Is the indicator lit or blinking?

    • Yes, the Ethernet connection appears to be working. Exit this MAP and determine whether the failure is still occurring.
    • No, go to step 13.
12. Observe the eth0 USB Ethernet 100/ACT LED indicator. See Figure 14.
    • The eth0 USB Ethernet adapter USB cable connects to the Thinkpad as shown in Figure 15.
    • The USB and Ethernet cables that connect to the eth0 adapter are black. See Figure 12.
    Figure 15. ThinkPad T510, T520 USB and RJ45 network connection ports

    

    Is the indicator lit or blinking?

    • Yes, the Ethernet connection appears to be working. Exit this MAP and determine whether the failure is still occurring.
    • No, go to step 13.
13. Perform the following steps:
    1. Ensure that the eth0 USB Ethernet adapter is properly connected to the laptop middle USB port. See Figure 13.
    2. Ensure that the private network cable is properly connected to the USB Ethernet adapter.
    3. If the cables are properly connected, the possible failing FRUs are the:
       • USB Ethernet adapter, private network cable, or USB cable, all three of which can be replaced concurrently.
       • USB port on the laptop, which requires replacing the laptop.

In this section, you attempt to resolve the problem by performing a network reset on the failing management console network port.

In this section, you attempt to resolve the problem by performing a network reset on the failing management console network port.

In this section, you replace the xSeries HMC Ethernet adapter eth0 to correct problems with the Black network.

1. Ensure that the customer is not currently accessing the management console to perform a logical configuration of Copy Service functions. The management console is powered off to replace the Ethernet card.
2. Open the appropriate manual that is contained on the IBM DS8000® series Service Documents CDROM:
   • xSeries 335 Type 8676, Type 8830 Hardware Maintenance Manual and Troubleshooting Guide
   • xSeries 336 Type 1879 and Type 8837 Hardware Maintenance Manual and Troubleshooting Guide
   • IBM System x3550 Type 7978 and 1913 Problem Determination and Service Guide
3. Using the appropriate manual, replace the management console Ethernet adapter that is associated with eth0.

   Table 4. Management console (replacing the Ethernet adapters)

   Management console type	Replace	See figure:
   xSeries x335	Ethernet card P1-C2	Figure 7
   xSeries 336	Ethernet card P1-C1	Figure 10
   IBM® System x3550	System board P1	Figure 11

   1. Power off the server. (Refer to the "General information" section.)
   2. Replace the Ethernet card. (Refer to the "Customer replaceable units" section.)
   3. Power on the server (Refer to the "General information" section.)
4. Verify the fix by using the Network Topology test tool as described in MAP7001 Using the network topology tool. Is the network problem resolved?
   • Yes, return to the serviceable event and close it by reviewing the steps in MAP1500 Ending a service action.
   • No, if you have other FRUs to replace, then continue with the replacement. Otherwise, contact your next level of support.

In this section, you replace the SW1 Ethernet switch to correct problems with the Black network.

1. Go to Exchanging parts to replace the SW1 Ethernet switch. Return here after the Ethernet switch is replaced.
2. Verify the fix by using the Network Topology test tool as described in MAP7001 Using the network topology tool. Is the network problem resolved?
   • Yes, return to the serviceable event and close it by reviewing the steps in MAP1500 Ending a service action
   • No, if you have other FRUs to replace, then continue with the replacement. Otherwise, contact your next level of support.

In this section, you replace the Ethernet cable between the management console and the Ethernet switch.

1. Go to Exchanging parts to replace the cable between the management console and the SW1 Ethernet switch. Return here after the cable is replaced.
2. Verify the fix by using the Network Topology test tool as described in MAP7001 Using the network topology tool. Is the network problem resolved?
   • Yes, return to the serviceable event and close it by reviewing the steps in MAP1500 Ending a service action.
   • No, if you have other FRUs to replace, then continue with the replacement. Otherwise, contact your next level of support.

In this section, you replace network FRUs on the laptop HMC.

1. Read all the following steps before you begin the repair.
   1. The following possible failing FRUs can be replaced with the laptop powered-on:
      • eth0 USB Ethernet adapter
      • USB cable
      • Private network Ethernet cable
   2. This possible failing FRU requires the laptop to be shut down and fully powered off.
      Note: Ensure that the customer is not currently accessing the management console to perform a logical configuration of Copy Services functions.
      • ThinkPad laptop. The laptop system board is not a FRU for the 242x products; it takes too long to replace.
2. After you replace each FRU, observe the 100/ACT LED indicator on the Ethernet adapter.
   1. If it is lit, exit this MAP.
   2. If it is not lit, and you replaced all FRUs, try rebooting the HMC to reset the USB port.
   3. If the LED is still not lit, contact your next level of support.