Review: Cisco NX-OS 10.2(4)M for Nexus 3000/9000 Series

Verdict: A stable, "Extended Support" maintenance release that serves as a safe, mature landing spot for hardware platforms that cannot upgrade to the newer major release trains (10.3+). It is highly recommended for legacy N3K/N9K deployments requiring long-term stability over feature innovation.


Method A: SCP (Secure, Preferred)

switch# copy scp://user@192.168.1.100/nxos64-cs.10.2.4.m.bin bootflash:/

⚠️ Important Notes

3. Bootflash Space

The image size is approximately 800–950 MB. Ensure your switch’s bootflash has at least 2 GB free (to accommodate the new image + upgrade logs + backup).

Digital Signature Verification (Optional but Recommended)

Cisco signs images with GPG. Import Cisco’s public key:

gpg --import cisco-pubkey.asc
gpg --verify nxos64-cs.10.2.4.m.bin.sign nxos64-cs.10.2.4.m.bin

If signature is good, the image is authentic.