Packet loss – mismatch switch speed

Link encap:Ethernet  HWaddr 00:16:76:E1:A2:F8
inet addr:xx.xx.xx.51  Bcast:xx.xx.xx.63  Mask:255.255.255.192
inet6 addr: fe80::216:76ff:fee1:a2f8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:11098 errors:2178 dropped:0 overruns:0 frame:1098
TX packets:1493 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:751041 (733.4 KiB)  TX bytes:171501 (167.4 KiB)
Base address:0x2020 Memory:e0200000-e0220000

If you have packet loss and see RX errors/frame, there could be a problem with the interface settings. In this case, a mismatch speed with the switch (100mbps vs. 10mbps). Solution: correct the speed setting so they match. Command: “ethtool -s eth0 autoneg off duplex full speed 10” (immediate effect but will not remember after reboot) or put into config file for permanency:

## /etc/sysconfig/network-scripts/ifcfg-eth0 
ETHTOOL_OPTS="autoneg off speed 10 duplex full"

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