Cisco Router IOS Software Upgrade 방법 1. TFTP Server 실행
		를 더블 클릭한다.
	2. TFTP Server 화면이 열리면, 메뉴에서 “View”  ->  “Options”를 선택
	3. “TFTP server root”에 IOS S/W가 있는 디렉토리를 지정한 후 “OK”를 클릭
	4. Router에 login하여 TFTP 사용하기
		User Access Verification Password: pmj>en Password: pmj# <내장 flash memory 보는 명령> pmj# sh flash 4096K bytes of flash memory sized on embedded flash. Flash: No files present. [4194240/4194304 bytes free/total] <외장 flash memory로 들어가는 명령> pmj# cd slot0: <외장 flash memory를 보는 명령> pmj# sh flash -#- ED --type-- --crc--- -seek-- nlen -length- -----date/time------ name 1   .. unknown  D25E1C8E  47CFB8   22  4575029 Apr 06 2000 17:46:37 c7000-js-mz_112-21.bin 2   .. unknown  DFAA9BAD  8D9E7C   22  4574788 Apr 06 2000 18:15:05 c7000-js-mz_112-19.bin 7233924 bytes available (9150076 bytes used) < Flash memory의 file을 삭제하는 방법> 형식 : del [file 명] [사용예] pmj# del c7000-js-mz_112-21.bin Overwrite image file? [confirm]    ->  Enter를 친다. 위와 같이 실행하면 밑에서 보는 것처럼 delete된 File에 “D“로 checking이 된다. pmj# sh flash -#- ED --type-- --crc--- -seek-- nlen -length- -----date/time------ name 1   .D unknown  D25E1C8E  47CFB8   22  4575029 Apr 06 2000 17:46:37 c7000-js-mz_112-21.bin 2   .. unknown  DFAA9BAD  8D9E7C   22  4574788 Apr 06 2000 18:15:05 c7000-js-mz_112-19.bin 7233924 bytes available (9150076 bytes used) < “D”로 checking된 File을 완전히 삭제하려면> 형식 : squeeze [dev명] pmj#squeeze slot0: All deleted files will be removed, proceed? [confirm] Squeeze operation may take a while, proceed? [confirm] Erasing squeeze log 위의 작업은 몇 분 소요됨 pmj#sh flash -#- ED --type-- --crc--- ---seek--- nlen -length- -----date/time------ name 1   .. unknown  DFAA9BAD  47CEC4   22  4574788 Apr 06 2000 18:15:05 c7000-js-mz_112-19.bin 11809084 bytes available (4574916 bytes used) <외장 Flash에 있는 파일을 TFTP Server PC로 받기> 형식 : copy [dev명:] tftp [사용예] pmj#copy slot0: tftp Enter source file name: c7000-js-mz_112-19.bin    ->  PC에 있는 파일 이름을 지정 Enter destination file name [c7000-js-mz_112-19.bin]:   ->  Flash에 저장할 이름을 지정 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC Address or name of remote host []? 203.237.55.1->  TFTP Server PC IP Address 지정 아래 그림은 TFTP Server가 동작하고 있는 화면을 보여주고 있다. ! <TFTP Server에서 외장 flash로 받기> 형식 : copy tftp [dev명:] [사용예] pmj#copy tftp slot0: Enter source file name: c7000-js-mz_112-21.bin 11808956 bytes available on device slot0, proceed? [confirm] Address or name of remote host [203.237.55.1]? Accessing file "c7000-js-mz_112-21.bin" on 203.237.55.1 ...FOUND Loading c7000-js-mz_112-21.bin from 203.237.55.1 (via Ethernet3/0): !!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! [OK - 4575029/9149440 bytes] CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC pmj#sh flash -#- ED --type-- --crc--- -seek-- nlen -length- -----date/time------ name 1   .. unknown  DFAA9BAD  47CEC4   22  4574788 Apr 06 2000 18:15:05 c7000-js-mz_112-19.bin 2   .. unknown  D25E1C8E  8D9E7C   22  4575029 Apr 09 2000 22:28:20 c7000-js-mz_112-21.bin 7233924 bytes available (9150076 bytes used) pmj#conf t Enter configuration commands, one per line.  End with CNTL/Z. pmj(config)#boot system flash slot0:c7000-js-mz_112-21.bin   ->  boot System 지정 pmj(config)#config-register 0x2102   ->  레지스터값 설정 pmj(config)#^Z pmj#wr   ->  저장 Building configuration... [OK] pmj#reload   -> 재부팅 Proceed with reload? [confirm] < 부팅 후 확인> User Access Verification Password: pmj>en Password: pmj#sh run Building configuration... Current configuration: ! version 11.2 no service password-encryption service udp-small-servers service tcp-small-servers ! hostname pmj ! boot system flash slot0:c7000-js-mz_112-21.bin    ->  Boot System을 보여줌 enable secret 5 $1$D/oB$gaIoX.ABgDx4yVHiU6Bc3/ enable password test123 ! ip name-server 203.237.32.100 ! interface Ethernet3/0  ip address 203.237.55.254 255.255.255.0  no mop enabled