upgrade ROM and IOS for cisco 4900 switches

for ROM upgrade:

1. download last rom from cisco site.

2. copy rom file to switch bootflash:

3. turn on switch and enter control-C to go to rommon

4. enter rommon 1 >boot bootflash:cat4500-ios-promupgrade-122_31r_SGA7(or your rom)

5. switch will restarted after upgraide

6. run show version  | i ROM

 

 

for IOS upgrade:

1. download last ios

2. copy ios to switch bootflash:

3. enter show running-config | i boot system

4. go to config mode 

5. enter no boot system flash bootflash:cat4500-entservicesk9-mz.122-13.SG1.bin(your ios)

6. enter boot system flash bootflash:cat4500-entservicesk9-mz.122-54.SG.bin

7. save config and reboot switch

8. check ios version after reboot show version | i bootflash