Package: iftop
Version: 0.17-11
On one of my Hosts the iftop command doesn't show any traffic but there
is such on the eth0 device.
h694108:~# uname -a
Linux h694108.serverkompetenz.net 2.6.26-2-amd64 #1 SMP Thu Mar 26
02:56:43 UTC 2009 x86_64 GNU/Linux
h694108:~# cat /etc/network/interfaces
[...]
auto eth0
iface eth0 inet dhcp
[...]
h694108:~# iftop -i eth0
interface: eth0
IP address is: ***.***.***.*** [correct]
MAC address is: **:**:**:**:**:** [correct]
After starting the iftop tool all values stay at "0" and no traffic and
ip-addresses or hosts are displayed.
But there's always traffic on the interface.
A call with gdb shows a normal behavior and /proc/net/dev seems to be okay.
Here's maybe an hint:
h694108:~# strace iftop -i eth0
time(NULL) = 1246857205
gettimeofday({1246857205, 402266}, NULL) = 0
poll([{fd=0, events=POLLIN}], 1, 200) = 0 (Timeout)
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