Verify the IP address and default gateway on a VM¶

This section describes how to verify and troubleshoot issues with the IP address and the default gateway of a VM.

To verify the IP address and default gateway on a VM:

1. Log in to the VM in question.

2. Run the following command:

   ip a
   

   Example of system response:

   1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
       link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
       inet 127.0.0.1/8 scope host lo
          valid_lft forever preferred_lft forever
       inet6 ::1/128 scope host
          valid_lft forever preferred_lft forever
   3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
       link/ether ac:de:48:92:9d:69 brd ff:ff:ff:ff:ff:ff
       inet 10.167.4.21/24 brd 10.167.4.255 scope global eth1
          valid_lft forever preferred_lft forever
       inet6 fe80::aede:48ff:fe92:9d69/64 scope link
          valid_lft forever preferred_lft forever
   

   • If Ethernet does not have an IP address, run the following command:

     dhclient eth1
     

   • If Ethernet has an IP address with the /32 mask:

     1. Restart the VM.
     2. Verify ifmap-server.

   • If the interface is down, run the following command:

     ifcongfig eth1 up
     

3. Display the default gateway:

   route -n
   

   Example of system response:

   Kernel IP routing table
   Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
   0.0.0.0         10.167.4.1      0.0.0.0         UG    0      0        0 eth1
   10.167.4.0      0.0.0.0         255.255.255.0   U     0      0        0 eth1
   

4. Ping the default gateway.