Dummy Interface
Installing the Linux dummy-network interface
If your Linux system does not have network communication hardware installed, or if it uses the dynamic host configuration protocol (DHCP) for network IP address configuration, you can install a Dummy Network Interface Module using these procedures:
1. Add /sbin to your $PATH environment setting:
# PATH=$PATH:/sbin
2. Add an IP address and host name to your /etc/hosts table. For example, an Internet address of 10.0.0.1 would result in:
echo 10.0.0.1 $HOSTNAME >> /etc/hosts
3. Preload the dummy network driver on the machine.
If this command is successful, you do not receive any messages from the server.
# modprobe -a dummy
4. Bind the dummy established network interface to the $HOSTNAME configured IP address.
# ifconfig dummy0 $HOSTNAME # ifconfig dummy0:0 10.0.0.2 # ifconfig dummy0:1 10.0.0.3
5. For a DHCP environment, add a route other than “default” to the established virtual network setup.
# route add $HOSTNAME dummy0 # route add 10.0.0.2 dummy0:0 # route add 10.0.0.3 dummy0:1
6. Check the network binding: This command gives below listed output:
# ifconfig dummy0 dummy0 Link encap:Ethernet HWaddr 2A:7B:EA:49:69:E2 inet addr:10.0.0.1 Bcast:10.255.255.255 Mask:255.0.0.0 inet6 addr: fe80::287b:eaff:fe49:69e2/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:10 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:824 (824.0 b) # # ifconfig dummy0:0 dummy0:0 Link encap:Ethernet HWaddr 2A:7B:EA:49:69:E2 inet addr:10.0.0.2 Bcast:10.255.255.255 Mask:255.0.0.0 UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 # # ifconfig dummy0:1 dummy0:1 Link encap:Ethernet HWaddr 2A:7B:EA:49:69:E2 inet addr:10.0.0.3 Bcast:10.255.255.255 Mask:255.0.0.0 UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
7. Check the route binding: This command shows the routing as it is set up.
# route -n Kernel IP routing table: Destination Gateway Genmask Flags Metric Ref Use Iface 10.0.0.1 0.0.0.0 255.255.255.255 UH 0 0 0 dummy0 10.0.0.2 0.0.0.0 255.255.255.255 UH 0 0 0 dummy0 10.0.0.3 0.0.0.0 255.255.255.255 UH 0 0 0 dummy0 10.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 dummy0 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
References
Reference Info 1: Linux Network Administrators Guide