ESX: To verify the current networking configuration is valid and correct

  1. Verify the format and content of /etc/hosts.The hosts file is expected to have the following format: 


    127.0.0.1       localhost.localdomain localhost
    192.168.1.10    server.domain.com server

  2. Verify the contents of /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. For example:  

    NETWORKING=yes
    HOSTNAME=server.domain.com
    GATEWAY=192.168.1.1
    GATEWAYDEV=vswif0

  3. Verify that /etc/sysconfig/network-scripts/ifcfg-vswif0 has the correct settings for IP address (IPADDR), subnet mask (NETMASK), and network (NETWORK). Consult your network administrator if you are unsure. For example:  

    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. Run the following command to display the routing table:[root@server root]# route –n 

    You will see output similar to the following:

    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. Verify the DNS information in /etc/resolv.conf is correct for your environment.  

    search domain.com
    nameserver 192.168.1.2
    nameserver 192.168.1.3

  6. Verify network connectivity between systems with PING command.

This entry was posted on Tuesday, June 10th, 2008 at 8:51 am and is filed under Virtualization. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

2 Responses to “ESX: To verify the current networking configuration is valid and correct”

  1. keerthi Says:
    August 26, 2008 at 7:54 pm | Reply

    Hi,

    The above configuration helped coz i moved from DHCP. Also, the following is optional.
    NETWORK=192.168.1.0

    Before restarting the network service: –service network restart– , i ran the following: “esxcfg-vswif -e vswif0″ and it resolved the issue.

    Additionally i ran –esxcfg-vswif -l — to view the configred details.

    thankz
    keerthi

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