linux系统中ifconfig和文件⼀proc⼀net⼀net看网卡的流量有什么不同吗?
推荐回答(1个)
/proc/net/netstat 是个动态的监控结果,这个文件的内容可读性很差,基本上你无法看出哪个数值和哪个字段对应.但是,这个文件应该和这个命令的输出结果对应的:
netstat -s
其结果实例如下:
# netstat -s
Ip:
879154658 total packets received
330463 forwarded
0 incoming packets discarded
878748006 incoming packets delivered
877040865 requests sent out
Icmp:
2110 ICMP messages received
2 input ICMP message failed.
ICMP input histogram:
destination unreachable: 115
redirects: 1974
echo requests: 5
echo replies: 16
463480 ICMP messages sent
0 ICMP messages failed
ICMP output histogram:
destination unreachable: 276820
redirect: 186581
echo request: 76
echo replies: 3
IcmpMsg:
InType0: 16
InType3: 115
InType5: 1974
InType8: 5
OutType0: 3
OutType3: 276820
OutType5: 186581
OutType8: 76
Tcp:
42340 active connections openings
12200 passive connection openings
23951 failed connection attempts
6286 connection resets received
5 connections established
876702907 segments received
876237223 segments send out
8426 segments retransmited
0 bad segments received.
3208 resets sent
Udp:
114396 packets received
97 packets to unknown port received.
0 packet receive errors
1277 packets sent
TcpExt:
9 ICMP packets dropped because they were out-of-window
12223 TCP sockets finished time wait in fast timer
82624884 delayed acks sent
18 delayed acks further delayed because of locked socket
Quick ack mode was activated 24969 times
355480597 packets directly queued to recvmsg prequeue.
35784089 packets directly received from backlog
830125031 packets directly received from prequeue
164690190 packets header predicted
354815898 packets header predicted and directly queued to user
310086 acknowledgments not containing data received
520227894 predicted acknowledgments
5536 times recovered from packet loss due to SACK data
Detected reordering 3 times using FACK
Detected reordering 23 times using SACK
TCPDSACKUndo: 1
129 congestion windows recovered after partial ack
3751 TCP data loss events
TCPLostRetransmit: 1
1 timeouts after reno fast retransmit
811 timeouts after SACK recovery
2 timeouts in loss state
6263 fast retransmits
780 forward retransmits
74 retransmits in slow start
423 other TCP timeouts
57 sack retransmits failed
25417 DSACKs sent for old packets
59 DSACKs sent for out of order packets
5 DSACKs received
15 connections reset due to unexpected data
7 connections reset due to early user close
2 connections aborted due to timeout
IpExt:
InMcastPkts: 74183
OutMcastPkts: 880
InBcastPkts: 1928492
而IFCONFIG是网卡流量在一段时间内的统计信息:
eth0 Link encap:Ethernet HWaddr 00:06:5B:F8:14:14
inet addr:157.247.188.X Bcast:157.247.188.X Mask:255.255.255.0
inet6 addr: fe80::206:5bff:fef8:1414/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:21734598 errors:50101 dropped:0 overruns:0 frame:40611
TX packets:3664803 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2934251964 (2.7 GiB) TX bytes:2083327055 (1.9 GiB)
Base address:0xece0 Memory:fe8e0000-fe900000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:874873385 errors:0 dropped:0 overruns:0 frame:0
TX packets:874873385 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1444495820 (1.3 GiB) TX bytes:1444495820 (1.3 GiB)
从以上结果对比可以看出, netstat文件里面的统计信息是多块网卡的总和,按照协议来归类的.ifconfig的结果是每块网卡一份,按照数据包收发来归类的.
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