头一次对新的4506配置，遇到了一个奇怪的现象，终端设备，比如我自己的笔记本与4506中的48口的电口相连，配置好IP后，正常学到ARP，PING之类的都正常。
问题来了：
笔记本只要重新插拔网线（不小心碰断也好，最终的结果都是重新插拔了网线）
交换机中的对应的笔记本原本的IP的表项还在，但是匹配不上（MAC地址和IP都对应着笔记本）
笔记本就会探测到自己地址有冲突（静态指定，插拔后没变过）
然后WINDOWS给自己分配了169
然后交换机就只认169的IP，ARP表中就出现了2个笔记本MAC地址的表项（1个169的，1个原本指定的IP的）
Protocol Address Age (min) Hardware Addr Type Interface
Internet 169.x.x.x 0 0050.56af.de41 ARPA Vlan999
Internet 172.16.1.100 1 0050.56af.de41 ARPA Vlan999
此时的172这个表项已经老化，笔记本的IP配置仍旧是172.16.1.100
系统中的IPconfig会发现本地连接网卡中有2个IP，首选的是自动分配的169
排除是笔记本问题，用其他电脑也是一样的。
设备是全新的，没有关于ARP和MAC的配置
版本如下
Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500es8-UNIVERSAL-M), Version 03.03.02.XO RELEASE SOFTWARE (fc1)
Technical Support:
http://www.cisco.com/techsupportCopyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Tue 19-Aug-14 03:54 by prod_rel_team
Cisco IOS-XE software, Copyright (c) 2005-2013 by cisco Systems, Inc.
All rights reserved. Certain components of Cisco IOS-XE software are
licensed under the GNU General Public License ("GPL") Version 2.0. The
software code licensed under GPL Version 2.0 is free software that comes
with ABSOLUTELY NO WARRANTY. You can redistribute and/or modify such
GPL code under the terms of GPL Version 2.0. For more details, see the
documentation or "License Notice" file accompanying the IOS-XE software,
or the applicable URL provided on the flyer accompanying the IOS-XE
software.
ROM: 15.1(1r)SG5
ZJQY-Core-4506 uptime is 5 weeks, 5 days, 2 hours, 45 minutes
System returned to ROM by power-on
System restarted at 05:23:21 UTC Thu Dec 17 2015
Running default software
Jawa Revision 3, RadTrooper Revision 0x0.0x41, Conan Revision 0x1449
Last reload reason: power-on
License Information for 'WS-X45-SUP8-E'
License Level: ipbase Type: Permanent
Next reboot license Level: ipbase
cisco WS-C4506-E (P5040) processor (revision 2) with 4194304K bytes of physical memory.
Processor board ID FXS1928Q3DX
P5040 CPU at 2.2GHz, Supervisor 8-E
Last reset from PowerUp
21 Virtual Ethernet interfaces
60 Gigabit Ethernet interfaces
8 Ten Gigabit Ethernet interfaces
511K bytes of non-volatile configuration memory.
Configuration register is 0x2101
目前解决方法有2个，插拔后 手动清ARP表，或者再重新插拔次才能正常。
想知道这有什么更好的解决办法，或者是不是版本的BUG，万分感谢。
