>이제 겨우 라우터에 들어 올수 있게 되었는데 ..IOS가 하는 것을 최신버전으로 업그레이드를 하라고 하네요..
>명령어를 찾아보니까..
>Router#sh flash
>
>System flash directory:
>File  Length   Name/status
>  1   3774184  igs-i-l.111-5.bin
>[3774248 bytes used, 420056 available, 4194304 total]
>4096K bytes of processor board System flash (Read ONLY)
>
>이렇게 나오구여..
>
>Router#sh version
>Cisco Internetwork Operating System Software
>IOS (tm) 3000 Software (IGS-I-L), Version 11.1(5), RELEASE SOFTWARE (fc1)
>Copyright (c) 1986-1996 by cisco Systems, Inc.
>Compiled Mon 05-Aug-96 12:18 by mkamson
>Image text-base: 0x0301F600, data-base: 0x00001000
>
>ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
>ROM: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE  c1)
>
>Router uptime is 1 week, 1 day, 9 hours, 1 minute
>System restarted by power-on
>System image file is "flash:igs-i-l.111-5.bin", booted via flash
>
>cisco 2500 (68030) processor (revision D) with 1024K/1024K bytes of memory.
>Processor board ID 03868324, with hardware revision 00000000
>Bridging software.
>X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.
>1 Ethernet/IEEE 802.3 interface.
>2 Serial network interfaces.
>32K bytes of non-volatile configuration memory.
>4096K bytes of processor board System flash (Read ONLY)
>
>이렇게 나오는데...무슨 얘기인지는 다 모르겠으나..하여간 업데이트를 시켜야 합니다...
>
>1) 최신 cisco2500의 IOS 업데이트 버전을 알고 싶구여..
>2)현재 보시는 사양으로  어디까지 업데이트가 가능한지 알고 싶구여.
>3)백업 방법과 업데이트 방법도 알고자 합니다..
>그럼..
>

저는 ubr7246에서 ios를 upgrade했거든요..ㄱ
그래서 정리했던 내용을 올리 입니다. 참고 하세요.
...


Step 1: Install a tftp server
Step 2: ios image 연결.(tftp server)
Step 3: dram, flash memory checking.
                Dram : 128M
        Flash : 20M
Step 4: flash memory 공간 체크
        Router# dir slot0:
        Directory of slot0:/
1  -rw-    19780888   Jan 1 2000 00:20:03 +00:00  ubr7200-ik8s-
mz.122-15.BC2.bin
20578304 bytes total (797288 bytes free)
         ->현재 사용할수 있는 공간이 충분한지 체크 한다. 만약 충분하다면 계속 진 행를 하고 그렇지 않다면 flash memory를 formatting를 진행한다.
Step 5: 공간이 부족하다면 flash memory formatting진행.
        Router# format slot0:
Step 6: tftp server에 접속
        Router# copy tftp: slot0:
        Address or name of remote host []? 168.219.50.99
Source filename []? Ubr7200-ik8s-mz.122-15.bc2.bin
Destination filename []?Ubr7200-ik8s-mz.122-15.bc2.bin
Accessing tftp://168.219.50.99/ Ubr7200-ik8s-mz.122-15.bc2.bin...
Loading Ubr7200-ik8s-mz.122-15.bc2.bin from 168.219.50.99(via Ethernet10/5): !!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!
[OK − 12531084/25061376 bytes]
12531084 bytes copied in 641.540 secs (19549 bytes/sec)
step 7: boot시 새로운 image를 load할수 있도록 boot 환경 변경.
       Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#boot system flash slot0:rsp−jsv−mz.122−6.bin
Router(config)#^Z
Step 8: reload