Networks with 10.0.0.0 are class A networks (see http://www.iana.org/assignments/ipv4-address-space). So a netmask of 255.0.0.0 is the standard default.
Next questions: (1) where did you get 255.255.0.0 as the netmask? from your ISP? (If so, I presume they are partitioning their network.) (2) what software are you using the configure your network? NetworkManager, manual settings in /etc/network/inferfaces, or something else? -- Problem at start with network configuration : network masks https://bugs.launchpad.net/bugs/211231 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs