We have a Catalyst 3750 with old IOS version which is online. Now, we bought another Catalyst 3750 with newer IOS version and want to stack it to the old one. In order to avoid stacking version-mismatch, We need to make 2 switches in same version and keep the old switch working. That's the reason we would like to downgrade the IOS.
Find answers to CISCO 3750 IOS UPGRADE ISSUES. From the expert community at Experts Exchange Submit. If Cisco has offered a free software update to address a specific issue, noncontract customers who are eligible for the update may obtain it by contacting the Cisco TAC using any of the means described in the General Security-Related Queries section of this document. To verify their entitlement, individuals who contact the TAC should have.
3750-x switch is having an advanced feature for rommon recovery. for other switches we used to do xmodem recovery. for 3750-x switch we do not have to waste time like that.
follow the procedure, we can set the ipaddress even in the rommon prompt and transfer the image
Step 1 Connect your PC to the switch Ethernet management port.
Step 2 Unplug the switch power cord.
Step 3 Press the Mode button, and at the same time, reconnect the power cord to the switch.
You can release the Mode button a second or two after the LED above port 1 goes off. Several lines of information about the software appear with instructions:
The system has been interrupted prior to initializing the flash file system. The following
commands will initialize the flash file system, and finish loading the operating system
software#
commands will initialize the flash file system, and finish loading the operating system
software#
flash_init
boot
Step 4 Initialize the flash file system:
switch: flash_init
Step 5 Connect the switch to a TFTP server through the Ethernet management port.
Step 6 Start the file transfer by using TFTP.
![Ios Ios](https://www.certificationtrainingsolutions.com/wp-content/uploads/2017/11/CCNA-SECURITY-ADVANCED-PLUS-NEWEST-EDIT-e1551896732405.png)
a. Specify the IP address of the TFTP server:
switch: set ip_addr ip_address/mask
b. Specify the default router:
switch: set default_router ip_address
Step 7 Copy the software image from the TFTP server to the switch:
switch: copy tftp://ip_address/filesystem:/source-file-url flash:image_filename.bin
Cisco 3750 Ios Download
Step 8 Boot up the newly downloaded Cisco IOS image.
Cisco 3750 Upgrade Ios
switch: boot flash:image_filename.bin
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_55_se/configuration/guide/swtrbl.html#wp1099467
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_55_se/configuration/guide/swtrbl.html#wp1099467