System information

32 System Analysis and Tuning Guide
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:68562268 errors:0 dropped:4609817 overruns:0 frame:0
TX packets:113273547 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5375024474 (5126.0 Mb) TX bytes:321602834105 (306704.3
Mb)
2.5.2 Ethernet Cards in Detail: ethtool
ethtool can display and change detailed aspects of your ethernet network device.
By default it prints the current setting of the specified device.
# ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
[...]
Link detected: yes
The following table shows ethtool's options that you can use to query the device
for specific information:
Table2.1: List of ethtool's Query Options
ethtool's option it queries the device for
-a pause parameter information
-c interrupt coalescing information
-g Rx/Tx (receive/transmit) ring para-
meter information
-i associated driver information
-k offload information
-S NIC and driver-specific statistics