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I'm new to networking and I'm gearing up to add a switch to an existing stack at my job. The existing stacks are showing the following when I issue the show version command:

Switch Ports Model SW Version SW Image Mode


  • 1 56 WS-C3850-48P 03.07.05E cat3k_caa-universalk9 INSTALL

    2 56 WS-C3850-48P 03.07.05E cat3k_caa-universalk9 INSTALL

    3 56 WS-C3850-48P 03.07.05E cat3k_caa-universalk9 INSTALL

The switch I'm preparing to add to this stack is currently showing the following (I already renumbered and set the priority on it):

Switch Ports Model SW Version SW Image Mode


  • 4 56 WS-C3850-48U 03.07.05E cat3k_caa-universalk9 INSTALL

Will it cause any problems when I add the 48U model since the existing models are 48P? I believe the U is for UPOE and the P is PoE.

also...

I noticed the following on a label attached to each switch in the existing stack of 3 that reads WS-C3850-48F-S and the label on the one switch I plan to add reads WS-C3850-48U-L. I am very confused by the different information displayed when using the show version command versus what appears on the label attached to the switches by the manufacturer. Any help you can give is greatly appreciated.

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    F vs U differ in PoE: F is IEEE PoE+ (25.5 W) and U is proprietary Cisco UPoE (60 W). S stands for IP Service image/license, L is LAN Base. – Zac67 Feb 26 at 21:16
  • Thank you very much for taking the time to answer my question. Your response has been very helpful! – Anthony W Mar 1 at 19:41
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This should not be a problem, as long as IOS Version, License are same.

https://community.cisco.com/t5/switching/can-i-mix-poe-and-non-poe-3750-s-in-a-stack/td-p/3011926

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  • Well, the license isn't the same, see my comment. – Zac67 Feb 27 at 9:05
  • It will look for what is installed on the device, not the one on the label (in case they are different). Type 'show license right-to-use' on existing and new switch. If the output is same, then you are good to go. – Abu Zaid Feb 27 at 11:07
  • Thank you very much for taking the time to answer my question. Your response has been very helpful! – Anthony W Mar 1 at 19:42
  • You are welcome. Please accept the answer, so the question can be marked as been answered. – Abu Zaid Mar 2 at 19:22

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