3.4 Selecting Host Ethernet Interface

When connecting to a real network on a host with multiple network interfaces installed, Simics will select one of them for the real network connection. If the default selection is incorrect, all commands have an interface argument to select the desired interface. The interface name expected by the interface argument is the ordinary interface name used by the host operating system. The next two sections describe how to obtain the names of the simulation host's network interfaces for Linux and Windows hosts.

3.4.1 Linux

All network interfaces are listed by /sbin/ifconfig -a on the simulation host:

computer$ /sbin/ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:10:18:0A:DE:EF
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Interrupt:21

eth1      Link encap:Ethernet  HWaddr 00:0C:F1:D1:FF:09
          inet addr:10.0.0.140  Bcast:10.0.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:671467287 errors:0 dropped:0 overruns:0 frame:0
          TX packets:647635204 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:3725791210 (3553.1 Mb)  TX bytes:217046405 (206.9 Mb)
          Interrupt:20 Base address:0xdf40 Memory:fceef000-fceef038

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:24929 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24929 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:4164218 (3.9 Mb)  TX bytes:4164218 (3.9 Mb)

For example, to use the first interface listed above, specify eth0 as the interface argument.

3.4.2 Windows

The interface name expected by the interface argument is the ordinary interface name used by the host operating system. All interfaces of the host are listed in the Network Connections folder in the Control Panel; alternatively, ipconfig can be used in a command prompt on the simulation host:

C:\> ipconfig

Windows IP Configuration


Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . :
   IP Address. . . . . . . . . . . . : 10.0.0.191
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 10.0.0.3

Ethernet adapter LAB:

   Connection-specific DNS Suffix  . :
   IP Address. . . . . . . . . . . . : 10.10.0.1
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . :

Ethernet adapter TAP:

   Media State . . . . . . . . . . . : Media disconnected

For example, to use the first interface listed above, specify "Local Area Connection" as the interface argument. There is no need to specify the entire interface name: it is enough to specify a unique substring.