Cisco 12006 Router

The Cisco 12006 router is a legacy high-performance core router from the Cisco 12000 Series (Gigabit Switch Router - GSR) family. While it was a cornerstone of service provider networks in the early-to-mid 2000s, it is now considered a "vintage" or legacy platform in 2026, primarily relevant for the secondary market and specialized industrial labs NetworkworldCisco.

1. Product Specifications & Architecture

The Cisco 12006 is a 6-slot chassis designed for high-density 2.5 Gbps and 10 Gbps applications Cisco.

• Capacity: Supports 2.5 Gbps per-slot full-duplex switching with standard fabric cards, or 10 Gbps with the 12406 upgrade path CiscoCisco.
• Scalability: Uses a Clock Scheduler (CSC) and Switch Fabric Cards (SFC) for non-blocking architecture Cisco.
• Processor: Compatible with the Performance Route Processor-2 (PRP-2), supporting up to 4 million routes for large-scale table requirements Networkworld.

2. Lifecycle & Market Availability

The product is officially End-of-Support (EOS) by Cisco.

• End-of-Sale: December 2014 .
• Last Date of Support (LDOS): December 31, 2019 .
• Secondary Market Status: Currently available only through refurbished hardware vendors. A refurbished 12006 chassis typically ranges from $450 to $1,200, while common SFC/CSC fabric cards trade for $50 to $150 each Ebay.

3. Market Trends & Insights (2026)

The networking market in 2026 has shifted entirely toward AI-driven infrastructure and hyperscale performance, rendering legacy gear like the 12006 obsolete for modern production PersistencemarketresearchFuturumgroup.

• AI Infrastructure Boom: Cisco has redirected its focus toward the 8000 Series and Silicon One architecture, with AI-related orders reaching $9 billion in 2026 to support LLM data transfers Futurumgroup.
• Core Router Shift: Current trends favor 800GE throughput and 3nm silicon chips. The ASR 9000 series and ASR 1000 series have effectively replaced the GSR 12000 series in enterprise and carrier cores PersistencemarketresearchCisco.
• Secondary Market Resilience: Despite its age, a "circular economy" persists where vendors like CXtec and Curvature offer independent warranties for legacy hardware used in low-traffic or testing environments where new OEM costs are prohibitive NetworkworldCxtec.

For modern production needs, the market has transitioned to Software-Defined Networking (SDN) and AI-ready Ethernet fabrics, making the Cisco 12006 a relic of the "pre-AI" networking era Persistencemarketresearch.