前提,准备好需要使用的Native IOS. 具体方法如下: 插好引擎,开机. 看到如下信息以后 System Bo otstrap, Version 12.2(18r)SX2, RELEASE SOFTWARE (fc1) Technical Sup port: ht tp:/ /w w w.cisco.com/techsup port Copyright (c) 20 04 by cisco Systems, Inc. Cat6kSup32 platform with 524288 Kbytes of main memory Au