用Tftp通過CLI(Command Line Interface)升級Cisco Catalyst 2900.XL/3500.XL 交換機IOS
升級前需要留意事項:
1, 留意switch上的DRAM (Dynamic Random Aclearcase/" target="_blank" >ccess Memory) 及 Flash 的大小。每個IOS都對DRAM及Flash有一定要求,在升級之前必須要確定DRAM及Flash的大小。
確定DRAM的大小可以通過命令show version,如
有 8 MB DRAM 的 2900XL switch:
Switch#show version
Cisco Inte.network Operating System Software
IOS (TM) C2900XL Software (C2900XL.C3H2S.M), Version 12.0(5)XU, RELEASE SOFTWARE)
Copyright (c) 1986.2000 by cisco Systems, Inc.
Compiled Mon 03.Apr.00 16:37 by swati
Image text.base: 0x00003000, database: 0x00301398
ROM: Bootstrap program is C2900XL boot loader
2900XL_84.3 uptime is 27 minutes
System returned to ROM by reload
System image file is "flash:c2900XL.c3h2s.mz.120_5.XU.bin"
cisco WS.C2924M.XL (PowerPC403GA) processor (revision 0x11) with 8192K/1024K bytes of memory.
Processor board ID 0x10, with hardware revision 0x03
Last reset from warm.reset
...(output suppressed)
信息顯示在交換機上有 8192K DRAM 即 8 MB DRAM
確定FLASH的大小可以通過命令dir flash 如:
switch:dir flash:
(This command is only run if you are at the switch: prompt and want to determine how big the flash
Directory of flash:/
2 .r.. 2535
4 .rwx 1644160
5 .r.. 960
6 .r.. 19
1963008 bytes available (1649664 bytes used)
2, 下載合適的IOS。通常交換機的IOS有兩種文件,一種以tar結尾,另外一種以bin結尾。
結尾 特點
.tar(壓縮文件) ?包含bin文件,boot機文件?包含html文件,用于web形式管理交換機
.bin 單獨IOS文件不包含HTML文件,可以通過TFTP拷貝到交換機上
升級步驟:
1, 進入EXEC模式:
switch> enable
switch#
2, 顯示boot機參數
switch# show boot
BOOT path.list: flash:current_image
Config file: flash:config.text
Enable Break: 1
Manual Boot: no
HELPER path.list:
NVRAM/Config file
buffer size: 32768
3, 若BOOT path.list為空, 可以通過dir flash: 去顯示以bin結尾的文件
Switch# dir flash:
Directory of flash:
3 ...x 80971
4 d..x 14144
7 .rwx 84
5 ...x 111
258 ...x 111
230 .rwx 1470
3612672 bytes total (1229312 bytes free)
4, 將當前bin文件重命名為新的bin文件。
Switch# rename flash:current_image flash:new_image
Source filename [current_image]?
Destination filename [new_image]?
例如:
升級一臺 8 MB 2900XL switch,在switch上的bin文件為
c2900XL.c3h2.mz.112.8.5.SA6.bin, 你已經從cisco網站上下載了最新IOS文件 :c2900XL.c3h2s.mz.120.5.2.XU.tar
注意:.tar 結尾替換成 .bin.結尾
switch# rename flash:c2900XL.c3h2.mz.112.8.5.SA6.bin flash:c2900XL.c3h2s.mz.120.5.2.XU.bin
Source filename [c2900XL.c3h2.mz.112.8.5.SA6.bin]?
Destination filename [c2900XL.c3h2s.mz.120.5.2.XU.bin]?
注意:重命名只是升級的一個步驟,重命名并不是升級。
5, 檢查重命名后的文件。
Switch# dir flash:
Directory of flash:
3 ...x 80971
4 d..x 14144
7 .rwx 84
5 ...x 111
258 ...x 111
230 .rwx 1470
3612672 bytes total (1229312 bytes free)
6, 進入全局模式:
switch# config terminal
Enter configuration commands, one per line. End with CNTL/Z.
switch(config)#
7, Disable web 服務
switch(config)# no IP http server
8, 更改boot 機引導文件
Switch(config)# boot system flash:new_image
9, 返回 privileged EXEC mode:
switch(config)# end
10, 刪除HTML文件:
switch# delete flash:html/*
11, 如果從11.2(8)SA5 或更早的版本升級, 還要刪除SNMP目錄及下面的文件
switch# delete flash:html/Snmp/*
注意 'S'在 'SNMP'里是大寫。
12, 如果從11.2(8)SA5 或更早的版本升級,要在刪除后建立SNMP目錄
switch# mkdir flash:html/Snmp
13, 使用tar命令進行升級
Switch#tar /x tftp://server_ip_address//path/filename.tar flash:
Loading /path/filename.tar from server_ip_address (via VLAN1):!)
extracting info (111 bytes)
extracting filename.bin (1557286 bytes)!!!!!!!!!!!!!!!!!!!!
html/ (directory)
extracting html/Detective.html.gz (1139 bytes)!
extracting html/ieGraph.html.gz (553 bytes)
extracting html/DrawGraph.html.gz (787 bytes)!
. . .(output Suppressed)
[OK . 2723840 bytes]
(This message means that the TFTP process has passed successfully and both .bin and html files have been extracted successfully)
14, 進入全局設置模式
switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
15, 重新啟動web服務
switch(config)# IP http server
16, 返回 privileged EXEC 模式:
switch(config)# end
17, Reload 交換機
switch# reload
System configuration has been modified. Save? [yes/no]:y
Proceed with reload? [confirm]
升級完畢