Objective 9.4 – Troubleshoot Common Connectivity Issues

Knowledge

  • Review netcap logs for control plane connectivity issues
    • I believe this is a typo – should be netcpa logs
      ssh into the NSX controller and run:

      show log cloudnet/cloudnet_java-vnet-controller.log

      ssh into the ESX host and run:

      tail –f /var/log/netcpa.log
    • If you want to troubleshoot your User World Agent, you can increase the netcpa log level like this:
      Start by stopping the daemon

      # /etc/init.d/netcpad stop

      Enable write permisions on netcpa’s config file:

      # chmod +wt /etc/vmware/netcpa/netcpa.xml

      Increase log level:

      # vi /etc/vmware/netcpa/netcpa.xml

      Change the XML’s /config/log/level value to “verbose”, save and restart netcpad

      # /etc/init.d/netcpad start
  • Verify VXLAN, VTEP, MAC, and ARP mapping tables
    • VXLAN
      # show control-cluster vnet vxlan vni <vni>
      # esxcli network vswitch dvs vmware vxlan network list --vds-name=<VDS_NAME>
      
      VXLAN ID  Multicast IP               Control Plane                        Controller Connection  Port Count  MAC Entry Count  ARP Entry Count  MTEP Count
      --------  -------------------------  -----------------------------------  ---------------------  ----------  ---------------  ---------------  ----------
          5000  N/A (headend replication)  Enabled (multicast proxy,ARP proxy)  192.168.110.202 (up)            1                1                0           0
          5004  N/A (headend replication)  Enabled (multicast proxy,ARP proxy)  192.168.110.203 (up)            1                0                0           0
    • VTEP
      # show control-cluster vnet vxlan vtep-table <vni>
      # esxcli network vswitch dvs vmware vxlan network vtep list --vds-name=<VDS_NAME> --vxlan-id=<VXLAN_ID>
      # show control-cluster logical-switches vtep-records <ESXi_MGT_IP>
      
      VNI      IP              Segment         MAC               Connection-ID
      5001     192.168.150.51  192.168.150.0   00:50:56:60:6a:3a 2
    • MAC
      # show control-cluster vnet vxlan mac-table <vni>
      # esxcli network vswitch dvs vmware vxlan network mac list –-vds-name=<VDS_NAME> --vxlan-id=<VXLAN_ID>
      # show control-cluster logical-switches mac-records <ESXi_MGT_IP>
    • ARP
      # show control-cluster vnet vxlan vtep-table <vni>
      # esxcli network vswitch dvs vmware vxlan network vtep list --vds-name=<VDS_NAME> --vxlan-id=<VXLAN_ID>
      
  • List VNI configuration
    • From the NSX Controller CLI
      • List
        # show control-cluster vnet vxlan vni –l
      • Display
        # show control-cluster vnet vxlan vni <vni>
  • View VXLAN connection tables and statistics
    • Connection tables
      # show control-cluster vnet vxlan connection-table <vni>
    • Statistics
      # show control-cluster vnet vxlan vni-stats <vni>
  • Perform VTEP connectivity tests
    • At a logical switch level on the monitoring tab, use unicast or broadcast test to verify VTEP connectivity
      9.4.Troubleshooting VTEP

Tools

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One thought on “Objective 9.4 – Troubleshoot Common Connectivity Issues

  1. Pingback: VMware VCP-NV NSX Study Resources | darrylcauldwell.com

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