Hi, I tried to connect two UML instances using multicast networking. The instances, with identical kernels, were started with the following arguments:
UM1: ubd0=cow1,/home/samuel/src/uml/uml-fedora/FedoraCore5-AMD64-root_fs eth0=tuntap,tap0 eth1=mcast mem=256M umid=um1 con1=tty:/dev/tty UM2: ubd0=cow2,/home/samuel/src/uml/uml-fedora/FedoraCore5-AMD64-root_fs eth0=mcast mem=256M umid=um2 con1=tty:/dev/tty6 The network interfaces were configured with: UM1: ifconfig eth1 192.168.1.1 up; ifconfig lo up UM2: ifconfig eth0 192.168.1.2 up; ifconfig lo up Then I tried pinging one from the other, but nothing. What could be the problem? Guest kernel is 2.6.18. 'dmesg' shows nothing which could explain this, the mcast device should be configured ok AFAIK: [42949373.380000] Configured mcast device: 239.192.168.1:1102-1 [42949373.380000] Netdevice 1 : mcast backend multicast address: 239.192.168.1:1102, TTL:1 These lines are the same for both instances. Could something on the host affect how mcast works? /Samuel ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
