求助:有关tcpdump和 tcpshow

yameng

# tcpdump -s 1518 -w tcplog1.txt
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 1518 bytes

     
2107 packets captured
2107 packets received by filter
0 packets dropped by kernel

# tcpshow < tcplog1.txt
reading from file -, link-type EN10MB (Ethernet)
---------------------------------------------------------------------------
Packet 1
***Error: Badly formatted Ethernet address

如果不用tcpshow而直接把数据导入文本文件,可以正常查看,但用了tcpshow后出现了上述错误,这是什么原因?请指教,谢谢!

境:RH9 2.4.20-8,tcpdump-3.8.3,tcpshow-1.82-rh80_2.i386,libcap-0.7.2