Here's a dump from ifconfig:
[root@diaboli main]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:E0:18:0A:88:4E
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:13429117 errors:0 dropped:0 overruns:0 frame:0
TX packets:17439457 errors:0 dropped:0 overruns:0 carrier:0
collisions:230427
RX bytes:1602864140 (1528.6 Mb) TX bytes:957472890 (913.1 Mb)
eth1 Link encap:Ethernet HWaddr 00:E0:18:0A:88:4F
inet addr:10.0.0.1 Bcast:10.0.0.255 Mask:255.255.255.0
EtherTalk Phase 2 addr:65280/51
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:51016532 errors:0 dropped:0 overruns:0 frame:0
TX packets:43718918 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
RX bytes:2640847292 (2518.5 Mb) TX bytes:1679509941 (1601.7 Mb)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
EtherTalk Phase 2 addr:0/0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:849969 errors:0 dropped:0 overruns:0 frame:0
TX packets:849969 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
RX bytes:272830913 (260.1 Mb) TX bytes:272830913 (260.1 Mb)
ppp0 Link encap:Point-to-Point Protocol
inet addr:X.X.X.X P-t-P:Y.Y.Y.Y Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1
RX packets:1383796 errors:0 dropped:0 overruns:0 frame:0
TX packets:2021379 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
RX bytes:351961690 (335.6 Mb) TX bytes:2348232289 (2239.4 Mb)
Looks fine, doesn't it? Well, here's the uptime:
[root@diaboli main]# uptime
10:48pm up 30 days, 22:12, 1 user, load average: 0.94, 0.77, 0.39
Hmmm. Small amount of data for a month's worth of running, no? Actually, terabytes of data have passed through the internal interface in the last month. Heck, only half an hour before these dumps I had transferred another 15GB to the server.
Has anyone else noticed that the traffic figures don't seem to update?