通过控制台口和AUX端口来加载IOS

 　Router1#copy xmodem: slot1:

　　**** WARNING ****

　　x/ymodem is a slow transfer protocol limited to the current speed

　　settings of the auxiliary/console ports. The use of the auxilary

　　port for this download is strongly recommended.

　　During the course of the download no exec input/output will be

　　available.

                     　　---- ******* ----

　　Proceed? [confirm]

　　Destination filename []? c3620-ik9s-mz.122-12a.bin

　　Erase slot1: before copying? [confirm]

　　Use crc block checksumming? [confirm]

　　Max Retry Count [10]:

　　Perform image validation checks? [confirm]

　　Xmodem download using crc checksumming with image validation

　　Continue? [confirm]　　

　　Ready to receive file...........CC　　

　　4294967295 bytes copied in 1450.848 secs (1271445669961 bytes/sec)

　　Router1#

　　注释  思科建议使用AUX口进行此步骤，因为AUX口支持硬件流控。为了提高拷贝速度，建议提前

　　使用下述命令来设置端口速度

　　Router1#configure terminal

　　Enter configuration commands, one per line.　　End with CNTL/Z.

　　Router1(config)#line aux 0

　　Router1(config-line)#speed 115200

　　Router1(config-line)#end

　　Router1#