Core and aggregation networks don’t get a pass on growth. Traffic keeps climbing, 400GE keeps becoming the new baseline, and the hardware sitting at the edge of your network needs to scale without ballooning your footprint or your CapEx. The Cisco NCS-57B1-6D24-SYS — part of the Network Convergence System 5700 Series — is built precisely for that reality.

This fixed-chassis router pairs high-density 400G and 100G ports with Cisco’s Flexible Consumption licensing model, meaning you get carrier-class hardware today and the ability to scale capacity through Smart Licensing as your needs grow — without buying oversized gear upfront. Let’s dig into the specs, see where it fits, and cover how to request a quote.

Why Network Teams Are Deploying It

Global data center and cloud network traffic is growing well north of 25% annually, and 400GE has become the default building block for mass-scale core and aggregation networks. The NCS-57B1-6D24-SYS answers that shift directly: it’s the first Jericho2-based platform in a fixed 1RU form factor, delivering high 100G and 400G port density in a remarkably compact package.

Full Data Sheet

Note: Specifications should always be cross-checked against Cisco’s official NCS-57B1 Fixed Chassis Data Sheet before finalizing a network design.

Scaling Without the Overbuild

The Flexible Consumption Model is arguably the most important part of this system’s story. Instead of committing to a fixed capacity tier upfront, this model uses Smart Licensing to track consumption at the chassis and line-card level — meaning your investment scales alongside actual usage growth.

Popular Use Cases

Built for the 400G Era

What makes the NCS-57B1-6D24-SYS stand out isn’t just raw throughput — it’s how efficiently that throughput is delivered. Built on the Broadcom Jericho 2 network processor, the system uses a VOQ-only forwarding architecture with hybrid packet buffering, combining fast on-chip memory with deeper external HBM to smooth out traffic bursts without sacrificing latency. For operators running peering or core routing roles where microsecond-level performance matters, that architecture translates directly into more predictable network behavior under load.

Security hasn’t been bolted on as an afterthought either. Full line-rate MACsec support across 100G, 400G, and breakout ports means encryption doesn’t force a throughput trade-off — a critical requirement for carriers and enterprises moving sensitive traffic across shared or leased infrastructure. Combined with Class-C 1588 PTP timing and Synchronous Ethernet, this platform is equally at home in a 5G transport role, where precise timing synchronization across the radio access network is non-negotiable.

Then there’s the licensing model itself. Flexible Consumption through Cisco Smart Licensing shifts the economics of network buildouts: instead of estimating capacity needs three years out and buying accordingly, operators can right-size their initial purchase and scale licensing consumption as real traffic growth demands it. That’s a meaningful shift for finance teams as much as network architects — it turns a large, speculative capital purchase into a more predictable, usage-aligned model.

One important operational note: because this is a Flexible Consumption (“SYS”) variant rather than the perpetual-licensing (“H-S”) variant, an active Cisco Smart Licensing account is required before the system can be fully activated and put into production. That’s a step worth building into your deployment timeline early.

Ready to Scale Your Core Network?

Pricing, lead times, and Smart Licensing requirements can vary based on configuration, support tier, and current distributor inventory. Our team can help you get accurate, current numbers for your deployment.

Pricing, lead times, and licensing terms may vary by distributor — confirm current details with your Cisco-authorized partner before ordering.