diff options
Diffstat (limited to 'qemu-doc.texi')
| -rw-r--r-- | qemu-doc.texi | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/qemu-doc.texi b/qemu-doc.texi index 7ec41f5278..f970b2a59e 100644 --- a/qemu-doc.texi +++ b/qemu-doc.texi @@ -282,8 +282,8 @@ Connect the VLAN @var{n} to a remote VLAN in another QEMU virtual machine using a TCP socket connection. If @option{listen} is specified, QEMU waits for incoming connections on @var{port} (@var{host} is optional). @option{connect} is used to connect to -another QEMU instance using the @option{listen} option. @option{fd=h} -specifies an already opened socket. +another QEMU instance using the @option{listen} option. @option{fd=h} +specifies an already opened TCP socket. Example: @example @@ -293,6 +293,40 @@ qemu linux.img -net nic,macaddr=52:54:00:12:34:56 -net socket,listen=:1234 qemu linux.img -net nic,macaddr=52:54:00:12:34:57 -net socket,connect=127.0.0.1:1234 @end example +@item -net socket[,vlan=n][,fd=h][,mcast=maddr:port] + +Create a VLAN @var{n} shared with another QEMU virtual +machines using a UDP multicast socket, effectively making a bus for +every QEMU with same multicast address @var{maddr} and @var{port}. +NOTES: +@enumerate +@item +Several QEMU can be running on different hosts and share same bus (assuming +correct multicast setup for these hosts). +@item +mcast support is compatible with User Mode Linux (argument @option{eth@var{N}=mcast}), see +@url{http://user-mode-linux.sf.net}. +@item Use @option{fd=h} to specify an already opened UDP multicast socket. +@end enumerate + +Example: +@example +# launch one QEMU instance +qemu linux.img -net nic,macaddr=52:54:00:12:34:56 -net socket,mcast=230.0.0.1:1234 +# launch another QEMU instance on same "bus" +qemu linux.img -net nic,macaddr=52:54:00:12:34:57 -net socket,mcast=230.0.0.1:1234 +# launch yet another QEMU instance on same "bus" +qemu linux.img -net nic,macaddr=52:54:00:12:34:58 -net socket,mcast=230.0.0.1:1234 +@end example + +Example (User Mode Linux compat.): +@example +# launch QEMU instance (note mcast address selected is UML's default) +qemu linux.img -net nic,macaddr=52:54:00:12:34:56 -net socket,mcast=239.192.168.1:1102 +# launch UML +/path/to/linux ubd0=/path/to/root_fs eth0=mcast +@end example + @item -net none Indicate that no network devices should be configured. It is used to override the default configuration which is activated if no |