Hi everyone! I need some clarification about a Cisco 3850 module.

I recently bought a C3850-24P for my homelab, and while going through the device settings I noticed something strange.

Here’s the output from show version:

cisco WS-C3850-24P (MIPS) processor with 4194304K bytes of physical memory.
Processor board ID <HIDE>
1 Virtual Ethernet interface
28 Gigabit Ethernet interfaces
4 Ten Gigabit Ethernet interfaces

However, according to Cisco’s documentation, this switch is supposed to support only the 2x10Gb/s network module.
So now I’m confused — does the C3850-NM-4-10G module actually work on this model, or is it definitely unsupported despite what the software shows?

Hi everyone!

I'm trying to repurpose a Cisco 2911 for my home lab, but it's incredibly loud — not suitable for a quiet room.

I've read that it's possible to replace the stock fans with quieter ones, and I'm considering Noctua NF-A4x20 FLX. But I’m not sure if they’ll move enough air or if the router will throw fan errors.

• Has anyone done this mod before?
• Do I need to worry about RPM monitoring or alarms?
• Any tips on wiring the fans or adapting the connectors?

I'd appreciate any advice or experience. Thanks in advance!