由于这个问题，我要在MySQL服务器后端嗅探一些数据包，看看会发生什么：
# tcpdump -vv -s0 -c 100 -i bond0 tcp port 3306 and host 192.168.3.87 -w /home/quanta/3.87_aborted.pcap
正如你所看到的，我把snaplen设置为0，但仍然得到“捕获期间数据包大小有限”的消息：
MySQL Protocol Packet Length: 579 Packet Number: 96 text: 336 text: 1004352 text: 147619 text: 336 [Packet size limited during capture: MySQL truncated]
我的界面上的卸载设置：
# ethtool -k bond0 Offload parameters for bond0: Cannot get device rx csum settings: Operation not supported rx-checksumming: off tx-checksumming: on scatter-gather: on tcp segmentation offload: on udp fragmentation offload: off generic segmentation offload: off generic-receive-offload: off
/proc/net/bonding/bond0 ：
Ethernet Channel Bonding Driver: v3.4.0-1 (October 7, 2008) Bonding Mode: adaptive load balancing Primary Slave: None Currently Active Slave: eth1 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: eth1 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:30:48:c3:20:be
回复@HeatfanJohn：
# ethtool -k eth1 Offload parameters for eth1: Cannot get device udp large send offload settings: Operation not supported rx-checksumming: on tx-checksumming: on scatter-gather: on tcp segmentation offload: on udp fragmentation offload: off generic segmentation offload: off generic-receive-offload: on
回复@Doon：
bond0 UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
用-s 1500嗅探还显示：
41 11.371783 192.168.6.7 -> 192.168.3.87 MySQL Response OK 42 11.371974 192.168.3.87 -> 192.168.6.7 MySQL Request Ping 43 11.371996 192.168.6.7 -> 192.168.3.87 MySQL Response OK 44 11.378562 192.168.3.87 -> 192.168.6.7 MySQL Request Query 45 11.379604 192.168.6.7 -> 192.168.3.87 MySQL Response 46 11.402431 192.168.3.87 -> 192.168.6.7 MySQL Request Query 47 11.402992 192.168.6.7 -> 192.168.3.87 MySQL Response[Packet size limited during capture]
这里是在答案的forms，用正确的措辞:)我会尝试禁用分段卸载。 启用它后，tcpdump很可能无法获得预期的结果。
–Matt
关于TCP卸载的事情我完全遵守： http : //www.linuxfoundation.org/collaborate/workgroups/networking/toe