Cisco N3K-C3636C-R 36x 100GB QSFP28 Back-to-Front Airflow Switch

The Cisco N3K-C3636C-R is the Nexus 3636C-R, a 1-RU deep-buffer 100 Gigabit switch. Its 36 QSFP28 ports run at 100G or 40G with 4x25G and 4x10G breakout, eight of the ports support MACsec encryption, and the switch moves 7.2 Tbps with forwarding up to 3.34 Bpps. The defining feature is the 16GB dynamic packet buffer, double what the 36180YC-R carries, which makes this the family's answer to sustained congestion at the spine, the internet edge, and in storage and big-data fabrics where incast is the rule rather than the exception. Routing scale reaches 128K LPM routes and 750K host and MAC entries, with an 8-core CPU and 32GB of DRAM behind the control plane. Three redundant hot-swap fan modules cool the 1-RU chassis, and typical draw runs around 921 watts under load.

This unit is the back-to-front airflow (port-side exhaust) with NXA-PAC-2KW-PE power supplies and matching NXA-FAN-65CFM fans; both directions are offered, so check the suffix on your existing spares before ordering replacements or additions. If your fabric runs standard buffers at 100G, the N3K-C3232C with 32x 100GB QSFP28 covers similar density for less.

This seller refurbished Cisco N3K-C3636C-R switch is tested, working, and covered by the NetworkTigers one-year warranty.