Cisco UCS B-Series GUI Firmware Management Guide, Release 2.1
Verifying that the Data Path is Ready
Downloads: This chapterpdf (PDF - 1.22MB) The complete bookPDF (PDF - 3.0MB) | The complete bookePub (ePub - 296.0KB) | Feedback

Verifying that the Data Path is Ready

Verifying that the Data Path is Ready

This chapter includes the following sections:

Verifying that Dynamic vNICs Are Up and Running

When you upgrade a Cisco UCS that includes dynamic vNICs and an integration with VMware vCenter, you must verify that all dynamic VNICs are up and running on the new primary fabric interconnect before you activate the new software on the former primary fabric interconnect to avoid data path disruption.

Perform this step in the Cisco UCS Manager GUI.

Procedure
    Step 1   In the Navigation pane, click the VM tab.
    Step 2   On the VM tab, expand All > VMware > Virtual Machines.
    Step 3   Expand the virtual machine for which you want to verify the dynamic vNICs and choose a dynamic vNIC.
    Step 4   In the Work pane, click the VIF tab.
    Step 5   On the VIF tab, verify that the Status column for each VIF is Online.
    Step 6   Repeat Steps 3 through 5 until you have verified that the VIFs for all dynamic vNICs on all virtual machines have a status of Online.

    Verifying the Ethernet Data Path

    Procedure
       Command or ActionPurpose
      Step 1UCS-A /fabric-interconnect # connect nxos {a | b}  

      Enters NX-OS mode for the fabric interconnect.

       
      Step 2UCS-A(nxos)# show int br | grep -v down | wc –l 

      Returns the number of active Ethernet interfaces.

      Verify that this number matches the number of Ethernet interfaces that were up prior to the upgrade.

       
      Step 3UCS-A(nxos)# show platform fwm info hw-stm | grep '1.' | wc –l 

      Returns the total number of MAC addresses.

      Verify that this number matches the number of MAC addresses prior to the upgrade.

       

      The following example returns the number of active Ethernet interfaces and MAC addresses for subordinate fabric interconnect A so that you can verify that the Ethernet data path for that fabric interconnect is up and running:

      UCS-A /fabric-interconnect # connect nxos a
      UCS-A(nxos)# show int br | grep -v down  | wc -l
      86
      UCS-A(nxos)# show platform fwm info hw-stm | grep '1.' | wc -l
      80
       

      Verifying the Data Path for Fibre Channel End-Host Mode

      For best results when upgrading a Cisco UCS domain, we recommend that you perform this task before you begin the upgrade and after you activate the subordinate fabric interconnect, and then compare the two results.

      Procedure
         Command or ActionPurpose
        Step 1UCS-A /fabric-interconnect # connect nxos {a | b}  

        Enters NX-OS mode for the fabric interconnect.

         
        Step 2UCS-A(nxos)# show npv flogi-table 

        Displays a table of flogi sessions.

         
        Step 3UCS-A(nxos)# show npv flogi-table | grep fc | wc -l 

        Returns the number of servers logged into the fabric interconnect.

        The output should match the output you received when you performed this verification prior to beginning the upgrade.

         

        The following example displays the flogi-table and number of servers logged into subordinate fabric interconnect A so that you can verify that the Fibre Channel data path for that fabric interconnect in Fibre Channel End-Host mode is up and running:

        UCS-A /fabric-interconnect # connect nxos a
        UCS-A(nxos)# show npv flogi-table
        --------------------------------------------------------------------------------
        SERVER                                                                  EXTERNAL
        INTERFACE VSAN FCID             PORT NAME               NODE NAME       INTERFACE
        --------------------------------------------------------------------------------
        vfc705    700  0x69000a 20:00:00:25:b5:27:03:01 20:00:00:25:b5:27:03:00 fc3/1
        vfc713    700  0x690009 20:00:00:25:b5:27:07:01 20:00:00:25:b5:27:07:00 fc3/1
        vfc717    700  0x690001 20:00:00:25:b5:27:08:01 20:00:00:25:b5:27:08:00 fc3/1
         
        Total number of flogi = 3.
        
        UCS-A(nxos)# show npv flogi-table | grep fc | wc -l
        3
         

        Verifying the Data Path for Fibre Channel Switch Mode

        For best results when upgrading a Cisco UCS domain, we recommend that you perform this task before you begin the upgrade and after you activate the subordinate fabric interconnect, and then compare the two results.

        Procedure
           Command or ActionPurpose
          Step 1UCS-A /fabric-interconnect # connect nxos {a | b}  

          Enters NX-OS mode for the fabric interconnect.

           
          Step 2UCS-A(nxos)# show flogi database 

          Displays a table of flogi sessions.

           
          Step 3UCS-A(nxos)# show flogi database | grep –I fc | wc –1 

          Returns the number of servers logged into the fabric interconnect.

          The output should match the output you received when you performed this verification prior to beginning the upgrade.

           

          The following example displays the flogi-table and number of servers logged into subordinate fabric interconnect A so that you can verify that the Fibre Channel data path for that fabric interconnect in Fibre Channel End-Host mode is up and running:

          UCS-A /fabric-interconnect # connect nxos a
          UCS-A(nxos)# show flogi database
          --------------------------------------------------------------------------------
          INTERFACE        VSAN    FCID           PORT NAME               NODE NAME
          --------------------------------------------------------------------------------
          vfc726           800   0xef0003  20:00:00:25:b5:26:07:02 20:00:00:25:b5:26:07:00
          vfc728           800   0xef0007  20:00:00:25:b5:26:07:04 20:00:00:25:b5:26:07:00
          vfc744           800   0xef0004  20:00:00:25:b5:26:03:02 20:00:00:25:b5:26:03:00
          vfc748           800   0xef0005  20:00:00:25:b5:26:04:02 20:00:00:25:b5:26:04:00
          vfc764           800   0xef0006  20:00:00:25:b5:26:05:02 20:00:00:25:b5:26:05:00
          vfc768           800   0xef0002  20:00:00:25:b5:26:02:02 20:00:00:25:b5:26:02:00
          vfc772           800   0xef0000  20:00:00:25:b5:26:06:02 20:00:00:25:b5:26:06:00
          vfc778           800   0xef0001  20:00:00:25:b5:26:01:02 20:00:00:25:b5:26:01:00
           
          Total number of flogi = 8.
          UCS-A(nxos)# show flogi database | grep fc | wc -l
          8