CentOS5 ifconfig dropped 丢很多包

tb100453

今天发现服务器很多丢包，大家能告诉我从哪里下手，排查问题；
fconfig: eth0      Link encap:Ethernet  HWaddr 00:1E:0B:CA:96:C4  
          inet addr.x.x.x  Bcast.x.255.255  Mask.x.0.0
          inet6 addr: fe80::21e:bff:feca:96c4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:128509717 errors:0 dropped:1305883 overruns:0 frame:0
          TX packets:396312243 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:11227769354 (10.4 GiB)  TX bytes:590972612221 (550.3 GiB)
          Interrupt:169 Memory:f8000000-f8012800
详细信息如下：
ifconfig:

1. eth0      Link encap:Ethernet  HWaddr 00:1E:0B:CA:96:C4  
   
2.           inet addr:x.x.x.x  Bcast:x.x.255.255  Mask:x.x.0.0
   
3.           inet6 addr: fe80::21e:bff:feca:96c4/64 Scope:Link
   
4.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
   
5.           RX packets:128509717 errors:0 dropped:1305883 overruns:0 frame:0
   
6.           TX packets:396312243 errors:0 dropped:0 overruns:0 carrier:0
   
7.           collisions:0 txqueuelen:1000
   
8.           RX bytes:11227769354 (10.4 GiB)  TX bytes:590972612221 (550.3 GiB)
   
9.           Interrupt:169 Memory:f8000000-f8012800
   
10. eth1      Link encap:Ethernet  HWaddr 00:1E:0B:CA:96:C2  
    
11.           inet addr:x.x.x.x  Bcast:x.x.x.x  Mask:x.x.x.x
    
12.           inet6 addr: fe80::21e:bff:feca:96c2/64 Scope:Link
    
13.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
    
14.           RX packets:5601651027 errors:0 dropped:39878370 overruns:0 frame:0
    
15.           TX packets:1359815660 errors:0 dropped:0 overruns:0 carrier:0
    
16.           collisions:0 txqueuelen:1000
    
17.           RX bytes:8345071401778 (7.5 TiB)  TX bytes:1335273375167 (1.2 TiB)
    
18.           Interrupt:177 Memory:fa000000-fa012800

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ethtool 查看结果如下：

1. 
   
2. # ethtool -i eth0
   
3. driver: bnx2
   
4. version: 1.9.3
   
5. firmware-version: 1.9.6
   
6. bus-info: 0000:03:00.0
   

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1. 
   
2. # ethtool eth0
   
3. Settings for eth0:
   
4.         Supported ports: [ TP ]
   
5.         Supported link modes:   10baseT/Half 10baseT/Full
   
6.                                 100baseT/Half 100baseT/Full
   
7.                                 1000baseT/Full
   
8.         Supports auto-negotiation: Yes
   
9.         Advertised link modes:  10baseT/Half 10baseT/Full
   
10.                                 100baseT/Half 100baseT/Full
    
11.                                 1000baseT/Full
    
12.         Advertised auto-negotiation: Yes
    
13.         Speed: 1000Mb/s
    
14.         Duplex: Full
    
15.         Port: Twisted Pair
    
16.         PHYAD: 1
    
17.         Transceiver: internal
    
18.         Auto-negotiation: on
    
19.         Supports Wake-on: g
    
20.         Wake-on: g
    
21.         Link detected: yes
    

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netstat查看的结果如下：

1. 
   
2. # netstat -i
   
3. Kernel Interface table
   
4. Iface       MTU Met    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
   
5. eth0       1500   0 132308207      0 1343494      0 407782672      0      0      0 BMRU
   
6. eth0:0     1500   0      - no statistics available -                            BMRU
   
7. eth1       1500   0 5602167786      0 39881197      0 1359900826      0      0      0 BMRU
   
8. lo        16436   0 98360681      0      0      0 98360681      0      0      0 LRU
   
9. # netstat -s
   
10. Ip:
    
11.     2463666205 total packets received
    
12.     20 with invalid headers
    
13.     2582425346 forwarded
    
14.     0 incoming packets discarded
    
15.     4137455826 incoming packets delivered
    
16.     423491528 requests sent out
    
17.     7 outgoing packets dropped
    
18.     9345 reassemblies required
    
19.     4265 packets reassembled ok
    
20. Icmp:
    
21.     353608 ICMP messages received
    
22.     4174 input ICMP message failed.
    
23.     ICMP input histogram:
    
24.         destination unreachable: 130569
    
25.         timeout in transit: 21
    
26.         source quenches: 84
    
27.         redirects: 9274
    
28.         echo requests: 183073
    
29.         echo replies: 30587
    
30.     693106 ICMP messages sent
    
31.     0 ICMP messages failed
    
32.     ICMP output histogram:
    
33.         destination unreachable: 440342
    
34.         time exceeded: 20
    
35.         redirect: 67
    
36.         echo request: 69605
    
37.         echo replies: 183072
    
38. IcmpMsg:
    
39.         InType0: 30587
    
40.         InType3: 130569
    
41.         InType4: 84
    
42.         InType5: 9274
    
43.         InType8: 183073
    
44.         InType11: 21
    
45.         OutType0: 183072
    
46.         OutType3: 440342
    
47.         OutType5: 67
    
48.         OutType8: 69605
    
49.         OutType11: 20
    
50. Tcp:
    
51.     9015583 active connections openings
    
52.     142644674 passive connection openings
    
53.     8094060 failed connection attempts
    
54.     573801 connection resets received
    
55.     476 connections established
    
56.     1828666379 segments received
    
57.     1124924916 segments send out
    
58.     120601732 segments retransmited
    
59.     0 bad segments received.
    
60.     9972936 resets sent
    
61. Udp:
    
62.     2220775725 packets received
    
63.     383058 packets to unknown port received.
    
64.     2491484 packet receive errors
    
65.     893184111 packets sent
    
66. TcpExt:
    
67.     78488 invalid SYN cookies received
    
68.     37 resets received for embryonic SYN_RECV sockets
    
69.     1098 packets pruned from receive queue because of socket buffer overrun
    
70.     69 ICMP packets dropped because they were out-of-window
    
71.     14082951 TCP sockets finished time wait in fast timer
    
72.     2340 time wait sockets recycled by time stamp
    
73.     1914 packets rejects in established connections because of timestamp
    
74.     24160711 delayed acks sent
    
75.     1170320 delayed acks further delayed because of locked socket
    
76.     Quick ack mode was activated 75010 times
    
77.     8943 times the listen queue of a socket overflowed
    
78.     8943 SYNs to LISTEN sockets ignored
    
79.     1283351 packets directly queued to recvmsg prequeue.
    
80.     56209219 packets directly received from backlog
    
81.     1699235894 packets directly received from prequeue
    
82.     1122063487 packets header predicted
    
83.     1194832 packets header predicted and directly queued to user
    
84.     3586267895 acknowledgments not containing data received
    
85.     574348960 predicted acknowledgments
    
86.     20790 times recovered from packet loss due to fast retransmit
    
87.     2152857 times recovered from packet loss due to SACK data
    
88.     5 bad SACKs received
    
89.     Detected reordering 17256 times using FACK
    
90.     Detected reordering 44515 times using SACK
    
91.     Detected reordering 1154 times using time stamp
    
92.     1876 congestion windows fully recovered
    
93.     29078 congestion windows partially recovered using Hoe heuristic
    
94.     TCPDSACKUndo: 2049
    
95.     10000 congestion windows recovered after partial ack
    
96.     85556504 TCP data loss events
    
97.     TCPLostRetransmit: 35
    
98.     138 timeouts after reno fast retransmit
    
99.     45276 timeouts after SACK recovery
    
100.     14865 timeouts in loss state
     
101.     65496127 fast retransmits
     
102.     10728726 forward retransmits
     
103.     43343580 retransmits in slow start
     
104.     899202 other TCP timeouts
     
105.     TCPRenoRecoveryFail: 20194
     
106.     30150 sack retransmits failed
     
107.     60 times receiver scheduled too late for direct processing
     
108.     278275 packets collapsed in receive queue due to low socket buffer
     
109.     74973 DSACKs sent for old packets
     
110.     30 DSACKs sent for out of order packets
     
111.     715566 DSACKs received
     
112.     6564 DSACKs for out of order packets received
     
113.     495140 connections reset due to unexpected data
     
114.     133063 connections reset due to early user close
     
115.     1383 connections aborted due to timeout
     
116. IpExt:
     
117.     InNoRoutes: 16
     
118.     InMcastPkts: 1812093653
     
119.     OutMcastPkts: 796543502
     
120.     InBcastPkts: 97249998
     
121.     OutBcastPkts: 10002759
     

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