Verifying ESX host networking configuration on the service console

Below are the steps you need to follow while checking the network configuration on ESX service console:

1. To verify the format and content of /etc/hosts , run the command:
   
   [root@server root]# cat /etc/hosts
   
   Here is an example of the hosts file:
   
   127.0.0.1       localhost.localdomain localhost
   192.168.1.10    server.domain.com server
2. To verify the contents of /etc/sysconfig/network , run the command:
   
   [root@server root]# cat /etc/sysconfig/network
   
   Confirm that the proper values for your environment exist for the fully qualified hostname and gateway. Consult your network administrator if you are unsure of the proper values.
   
   Here is an example of the network file:
   
   NETWORKING=yes
   HOSTNAME=server.domain.com
   GATEWAY=192.168.1.1
   GATEWAYDEV=vswif0
3. To verify that /etc/sysconfig/network-scripts/ifcfg-vswif0 has the correct settings for IP address (IPADDR), subnet mask (NETMASK), and network (NETWORK), run the command:
   
   [root@server root]# cat /etc/sysconfig/network-scripts/ifcfg-vswif0 
   
   Consult your network administrator if you are unsure of the correct settings.
   
   Here is an example of the ifcfg-vswif0 file:
   
   DEVICE=vswif0
   BOOTPROTO=static
   BROADCAST=192.168.1.255
   IPADDR=192.168.1.10
   NETMASK=255.255.255.0
   NETWORK=192.168.1.0
   ONBOOT=yes
   PORTGROUP="Service Console"
   MACADDR=00:50:56:4a:66:ba
4. To display the routing table, run the command: 
   
   [root@server root]# route –n
   
   The output looks similar to:
   
   Kernel IP routing table
   Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
   192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 vswif0
   169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 vswif0
   0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 vswif0
   
   Ensure that the second column of the row flagged with UG matches the gateway address for your environment.
5. To verify that the DNS information in /etc/resolv.conf is correct for your environment, run the command:
   
   [root@server root]# cat /etc/resolv.conf 
   
   Here is an example of the resolv.conf file: 
   
   search domain.com
   nameserver 192.168.1.2
   nameserver 192.168.1.3
   
   Note: By default, up to three nameservers can be added to resolv.conf. The compile time parameter MAXNSdefines how many nameservers can be used.
    
6. Verify network connectivity between systems using ping comand.
    

Note: Changes to the network and ifcfg-vswif0 files require a restart of the network service. T o restart the network service, run the following command and press Enter:

[root@server root]# service network restart