together into virtual networks. This has several advantages:
- It's more secure because the QEMU instances use Unix domain
sockets to talk to the switch.
- It doesn't depend on the host's network interfaces. (Local
multicast fails if there is no default gateway, so for instance it
fails if a laptop is not connected to any network.)
- VDE devices can be connected together to form arbitrary network
topologies.
- VDE has a "wirefilter" tool to emulate delays and packet loss,
which are useful for network testing.
svn path=/nixos/trunk/; revision=25526