Moving a Campus from 1G to 10G Without a “Zero Downtime” Promise
Reduce migration risk through dependency mapping, staged changes, measurable acceptance and rollback rather than assuming redundant links prevent disruption.
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Sep 17, 2026
Data-Center Switching in 2026: Plan Beyond the Port-Speed Roadmap
A 2026 refresh should connect bandwidth choices with host readiness, optical architecture, software support, failure domains and operational capacity.
Sep 17, 2026Network engineeringBlog
Used, Refurbished and End-of-Life: Three Different Buying Questions
Separate physical condition, refurbishment evidence and manufacturer lifecycle status when evaluating pre-owned network equipment and replacement spares.
Sep 17, 2026Cisco · legacy-campusBlog
The Cheapest Chassis May Be the Most Expensive Incomplete System
Evaluate modular switches at a service-ready boundary: chassis, control and fabric components, line cards, power, software and acceptance work.
Sep 17, 2026Cisco · dc-modularBlog
StackWise and StackPower Protect Different Parts of the Network
A working data stack does not prove power resilience. Plan stack links, shared electrical capacity and failure-state service requirements independently.
Sep 17, 2026Cisco · power-stackBlog
Why More Bandwidth Alone Will Not Fix a RoCE Fabric
RoCE performance depends on host integration, traffic treatment and congestion behavior. Diagnose the communication path before buying a faster switch.
Sep 17, 2026Cisco · dc-leafBlog
FXO and FXS: Match the Telephone-Line Role Before the Module
Analog voice ports have different electrical and signaling roles. Identify the carrier, PBX and endpoint relationship before choosing a voice-gateway interface.
Sep 17, 2026Cisco · voiceBlog
Fixed or Modular Uplinks? Decide from the Next Network Change
Compare fixed and modular access uplinks using media certainty, growth, replacement needs and complete installed cost rather than access-port count alone.
Sep 17, 2026Cisco · campus-accessBlog
CXP and QSFP28: Equal 100G Labels Do Not Make Equal Interfaces
When replacing legacy 100G interconnects, compare connector architecture, signaling, host support and optical interfaces before proposing a substitute.
Sep 17, 2026Cisco · legacy-dcBlog
Why “ASR-Compatible” Is Not Enough for a Router Module
Router expansion depends on exact host architecture, carrier interfaces, software and service requirements—not a broad ASR or ISR family label.
Sep 17, 2026Cisco · wanBlog
An 80 km Optic Is Not an 80 km Link Guarantee
Long-reach optics must satisfy channel loss, receiver limits and dispersion conditions. Distance alone cannot establish whether a link will operate reliably.
Sep 17, 2026Cisco · long-reachBlog
Network Module or Optical Transceiver? Follow the Uplink End to End
Separate switch expansion modules, pluggable optics and fiber channels so an apparently correct transceiver does not hide an unsupported uplink design.
Sep 17, 2026Cisco · campus-fiberBlog