Can you stack a new Catalyst 1300 with an older CBS350? While early 2023 documentation said no, Cisco's latest 2026 firmware updates silently introduced a "Mixed Stacking Mode." However, this migration feature comes with a massive cost. In this Engineering Lab report, CCIE David Lorame reveals the hidden CLI commands to merge the switches, and explains the 3 severe performance penalties-including 10G bottlenecks and SSO failure-that you must know before deploying.
Engineer Lab
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Catalyst 1200 SFP Compatibility in 2025/2026: New Restrictions for Third-Party Optical Modules
Authored by:
David Lorame, Technical Director & Senior Network Architect (CCIE & HCIE)
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