Looks like it is NFS-related, as a test with the same NAS mounted using CIFS shows sensible values:
$ ifconfig eth1; dd if=/dev/zero of=/mnt/z/data/temp.dat bs=1M count=100; sync; ifconfig eth1 eth1 Link encap:Ethernet HWaddr 00:1b:21:2f:ae:37 inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::21b:21ff:fe2f:ae37/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:43573 errors:0 dropped:0 overruns:0 frame:0 TX packets:76991 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:5438181 (5.4 MB) TX bytes:1355808638 (1.3 GB) 100+0 records in 100+0 records out 104857600 bytes (105 MB) copied, 4.28289 s, 24.5 MB/s eth1 Link encap:Ethernet HWaddr 00:1b:21:2f:ae:37 inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::21b:21ff:fe2f:ae37/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:82079 errors:0 dropped:0 overruns:0 frame:0 TX packets:150222 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:8078705 (8.0 MB) TX bytes:1465632217 (1.4 GB) Very strange... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/864846 Title: ifconfig reports wrong network values To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/net-tools/+bug/864846/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs