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This article mainly introduces that if Cisco3750 changes IOS, it is very detailed and has certain reference value. Friends who are interested must finish reading it!

Background: two Cisco3750 do dual computers, Cisco3750-01 hardware failure, strike. The newly purchased second-hand switch is inconsistent with the previous IOS, so the IOS needs to be replaced.

Preparation: network cable, console line, tftp tool

Procedure:

Download the previous IOS from Cisco3750-02

1. Configure an interface address on the switch interface

SW-A-02 (3750-2) (config) # int g1plash 0TRAN23

SW-A-02 (3750-2) (config-if) # no switchport

SW-A-02 (3750-2) (config-if) # ip address 192.168.100.100 255.255.255.0

2. the notebook is connected to the switch with a network cable.

The notebook uses the ip address 192.168.100.101 to open the tftp tool (3CDaemon)

3. Download IOS

(1) Connectivity test between notebook and switch

SW-A-02 (3750-2) # ping 192.168.100.101

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.100.101, timeout is 2 seconds:

.!

Success rate is 80 percent (4amp 5), round-trip min/avg/max = 1-1-1 ms

(2) View Flash information

SW-A-02 (3750-2) # show flash

Directory of flash:/

2-rwx 2116 Jan 10 2013 18:53:29 + 08:00 vlan.dat

3 drwx 192 Mar 1 1993 08:19:14 + 08:00 c3750-i5-mz.122-20.SE4

89-rwx 16406 Sep 20 2014 17:05:31 + 08:00 config.text

90-rwx 3110 Mar 13 1993 12:40:51 + 08:00 startup-configw

91-rwx 27 Sep 20 2014 17:05:31 + 08:00 private-config.text

15998976 bytes total with 7386112 bytes free

SW-A-02 (3750-2) # cd c3750-i5-mz.122-20.SE4

SW-A-02 (3750-2) # dir

Directory of flash:/c3750-i5-mz.122-20.SE4/

4 drwx 2688 Mar 1 1993 08:16:56 + 08:00 html

86-rwx 5044988 Mar 1 1993 08:19:14 + 08:00 c3750-i5-mz.122-20.SE4.bin

87-rwx 494 Mar 1 1993 08:19:14 + 08:00 info

15998976 bytes total with 7386112 bytes free

SW-A-02 (3750-2) # pwd

Flash:/c3750-i5-mz.122-20.SE4/

(3) copy IOS from Flash to tftp

SW-A-02 (3750-2) # copy flash: tftp:

Source filename []? C3750-i5-mz.122-20.SE4

Address or name of remote host []? 192.168.100.101

Destination filename [c3750-i5-mz.122-20.SE4]?

% Error reading flash:/c3750-i5-mz.122-20.SE4 (Is a directory)

Replication failed, unable to copy folder

SW-A-02 (3750-2) # cd c3750-i5-mz.122-20.SE4

SW-A-02 (3750-2) # dir

Directory of flash:/c3750-i5-mz.122-20.SE4/

4 drwx 2688 Mar 1 1993 08:16:56 + 08:00 html

86-rwx 5044988 Mar 1 1993 08:19:14 + 08:00 c3750-i5-mz.122-20.SE4.bin

87-rwx 494 Mar 1 1993 08:19:14 + 08:00 info

15998976 bytes total with 7386112 bytes free

SW-A-02 (3750-2) # copy flash: tftp:

Source filename [/ c3750-i5-mz.122-20.SE4/c3750-i5-mz.122-20.SE4.bin]?

Address or name of remote host []? 192.168.100.101

Destination filename [/ c3750-i5-mz.122-20.SE4/c3750-i5-mz.122-20.SE4.bin]?

.

% Error opening tftp:// 192.168.100.101//c3750-i5-mz.122-20.SE4/c3750-i5-mz.122-20.SE4.bin (Timed out)

Copy the ios file still failed, after turning off the firewall on the notebook, the copy is normal.

SW-A-02 (3750-2) # copy flash: tftp:

Source filename [/ c3750-i5-mz.122-20.SE4/c3750-i5-mz.122-20.SE4.bin]?

Address or name of remote host []? 192.168.100.101

Destination filename [/ c3750-i5-mz.122-20.SE4/c3750-i5-mz.122-20.SE4.bin]?

! !!!

! !!!

! !!!

! !!!

! !!!

! !!

5044988 bytes copied in 13.916 secs (362531 bytes/sec)

Update the IOS on the new switch

1. Just in case, back up the IOS of the switch first (the method is the same as above)

Switch#show flash

Directory of flash:/

3-rwx 11518717 Mar 4 2010 07:05:23 + 00:00 c3750-ipservices-mz.122-50.SE3.bin

4-rwx 2072 Mar 1 1993 00:03:07 + 00:00 multiple-fs

15998976 bytes total with 4476416 bytes free

Switch#show boot

BOOT path-list: flash:c3750-ipservices-mz.122-50.SE3.bin

Config file: flash:/config.text

Private Config file: flash:/private-config.text

Enable Break: no

Manual Boot: no

HELPER path-list:

Auto upgrade: yes

Auto upgrade path:

Timeout for Config

Download: 0 seconds

Config Download

Via DHCP: disabled (next boot: disabled)

Switch#copy flash: tftp:

Source filename []? C3750-ipservices-mz.122-50.SE3.bin

Address or name of remote host []? 192.168.100.101

Destination filename [c3750-ipservices-mz.122-50.SE3.bin]?

!

11518717 bytes copied in 31.868 secs (361451 bytes/sec)

2. Delete the previous IOS

Switch#delete flash:c3750-ipservices-mz.122-50.SE3.bin

Delete filename [c3750-ipservices-mz.122-50.SE3.bin]?

Delete flash:c3750-ipservices-mz.122-50.SE3.bin? [confirm]

Switch#show flash

Directory of flash:/

4-rwx 2072 Mar 1 1993 00:03:07 + 00:00 multiple-fs

15998976 bytes total with 15995392 bytes free

3. Upload a new IOS

Switch#copy tftp: flash:

Address or name of remote host []? 192.168.100.101

Source filename []? C3750-i5-mz.122-20.SE4/c3750-i5-mz.122-20.SE4.bin

Destination filename [c3750-i5-mz.122-20.SE4.bin]?

Accessing t ftp://192.168.100.101/c3750-i5-mz.122-20.SE4/c3750-i5-mz.122-20.SE4.bin...

Loading c3750-i5-mz.122-20.SE4/c3750-i5-mz.122-20.SE4.bin from 192.168.100.101 via GigabitEthernet1/0/24:!

[OK-5044988 bytes]

5044988 bytes copied in 114.010 secs (44250 bytes/sec)

4. Change the startup order of IOS

Switch#show boot

BOOT path-list: flash:c3750-ipservices-mz.122-50.SE3.bin

Config file: flash:/config.text

Private Config file: flash:/private-config.text

Enable Break: no

Manual Boot: no

HELPER path-list:

Auto upgrade: yes

Auto upgrade path:

Timeout for Config

Download: 0 seconds

Config Download

Via DHCP: disabled (next boot: disabled)

Switch#config t

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

Switch (config) # boot system flash:c3750-i5-mz.122-20.SE4.bin

Switch#show boot

* Mar 1 00 Configured from console by console 17 Configured from console by console 10.775:% SYS-5-CONFIG_I:

BOOT path-list: flash:c3750-i5-mz.122-20.SE4.bin

Config file: flash:/config.text

Private Config file: flash:/private-config.text

Enable Break: no

Manual Boot: no

HELPER path-list:

Auto upgrade: yes

Auto upgrade path:

Timeout for Config

Download: 0 seconds

Config Download

Via DHCP: disabled (next boot: disabled)

5. Restart the switch after saving

Switch#write

Building configuration...

[OK]

Switch#reload

Proceed with reload? [confirm]

The above is all the contents of the article "Cisco3750 if you change IOS". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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