How to Verify That a Host's Interfaces Are Up

Use this procedure if your system does not communicate with other hosts as expected.

Before You Begin

You must be in the global zone in a role that can check network settings. The Security Administrator role and the System Administrator role can check these settings.

1. Verify that the system's network interface is up.

   The following output shows that the system has two network interfaces, hme0 and hme0:3. Neither interface is up.

   # ifconfig -a ... hme0: flags=1000843<BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2 inet 192.168.0.11 netmask ffffff00 broadcast 192.168.0.255 hme0:3 flags=1000843<BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2 inet 192.168.0.12 netmask ffffff00 broadcast 192.168.0.255

2. If the interface is not up, bring it up and then verify that it is up.

   The following output shows that both interfaces are up.

   # ifconfig hme0 up # ifconfig -a ... hme0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,... hme0:3 flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,..