Upgrading Cisco switches from 10/100 to gigabit

Hi – so we have about 20 Cisco 10/100 switches at 1 location, that we are looking to upgrade to gigabit. The models we have currently are 3750-24PS-S and 2960-24PC-S, and we haven’t decided which ones we are going to upgrade to yet (if anyone has suggestions, I’ll take them) About 15 years ago I used to manage some switches at an office where I worked, but I’ve totally forgotten since then. When we upgrade, I’m assuming we can copy the running config from each old switch, copy to the to new switch, and everything should work? All help and suggestions are greatly appreciated.
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atlas_shudderedSr. Network EngineerCommented:
If you are running 3750's and 2960's then the direct upgrade path is the 3850X and the 2960X.  The 3850 can be spendy depending on what you are connecting to it.  If all of these are straight access you may want to consider 2960X's only or a mix of the 2960X and the Cat9000 series.  Again, depending on need.

As to copy and paste of config, for the most, this still holds true as long as you have matching port counts and equal IOS versions in the 2960 scopes, not sure on the Cat9000's, but you will need to be prepared to do manual legwork for any cleanup/changes due to deprecated commands and differing block structures such as NTP, NetFlow, etc.

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Sam Simon NasserIT Support ProfessionalCommented:
im using the 2960 series, they are great. you should bear in mind if you need 2960S or 2960S POE (power over Ethernet). if you only connect computers, bring the normal 2960. if among the computers is IP phones, Wireless APs, you should bring the POW ones. my recommendation is to bring the POE ones, since you don't know in the future if you will install IP Phones or install WLAN APs (Cisco, ubiquiti)
Garry GlendownConsulting and Network/Security SpecialistCommented:
Somewhat depends on your requirements and budget ;)
2960X series are nices switches, with the possibility of using stacking modules to combine several physical switches to one logical one.
How is the network topology? I'm assuming fiber links between the switches? If so, will you need expandability beyond 1G between the switches?

Migration is relatively simple, though the port designations are different ("fastethernet1/10 => gigabit1/0/10 e.g.), but the rest should remain mostly unchanged.

Now, if you're more on a budget, you might also take a look at the 220 / 350 series of small business switches ... they are available in a bigger variety than the 2960 series, with (in part) more features, at quite a bit of savings compared to the typical Cisco switches of 2960X or higher ...

All in all, if you could share some more details of your setup, I could go into more depths ...
atlas_shudderedSr. Network EngineerCommented:
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