Recently purchased 3850 12 port switch to replace a cisco 3750 12 port. This switch connects all the other buildings. Each building has a 3750 switch. I've configured the 3850 vlans, etc as the 3750 switch. Will there be a issue for the 3850 switch communicating with the 3750 switches? I have 3650 switches that will replace the 3750 switches in the other buildings. If possible, I would prefer to replace one switch at a time instead all at the same time.
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it depends what you have configured on the 3750. The 3850 runs IOS XE, so not all commands and features (especially the QoS stuff) can be translated one-to-one.
Check Table 1 in the attached document:
Thanks for the replies! I matched the config from the 3750 to the 3850. Comparing the show run on both they now look similar. If I get the 3850 installed and communicating with 3750, then I can replace one switch as time.
there are certain hardware incompatibilities as well, e.g. the uplink modules from the 3750-X are not compatible with the Cisco Catalyst 3850. Also the 3750 runs MLS QoS, while the 3850 runs MQC QoS, both of which are quite different.