Cisco Switches N3K-C3408-S

N3K-C3408-S is the Cisco Nexus 3408-S switch with 32 ports of QSFP-DD. The Cisco Nexus® 3400-S is the first 400G programmable switch series in the Nexus 3000 portfolio with 50 Gbps PAM4 Serial-Deserializers (SerDes), designed for data centers with industry-leading performance-per-watt power efficiency at low latency, offering leading analytics.

Quick Spec

Table 1 shows the quick spec.

Product Details

Main benefits of the Cisco Nexus 3400-S switches:

• With the 12.8-Tbps ASIC, the Cisco Nexus 3408-S series provides 128 ports of 100G or 32 ports of 400G, allowing customers to grow at scale with fewer numbers of switches in their fabric, simplifying management and reducing cost and number of hops.
• At 400G, the Cisco Nexus 3400-S offers the lowest latency in the industry, of 370ns at high-power efficiency
• The Cisco Nexus 3400-S offers a programmable pipeline translated to flexible profiles, whether Longest-Prefix-Matching (LPM)-optimized or layer 3 host-optimized. Customers can choose the profile to match their deployment needs.
• The Cisco Nexus 3400-S supports comprehensive encapsulation and tunneling technologies, Virtual Extensible LAN (VXLAN), VXLAN routing, Multiprotocol Label Switching (MPLS), Generic Protocol Extension (GPE), Geneve, Network Virtualization Using Generic Routing Encapsulation (NVGRE), and more.
• Cisco Nexus 3400-S switches enable deep network analytics, offering per flow monitoring, queue forensics, and drop-packet forensics to help monitor customer networks.The Cisco Nexus 3408-S is a 4-Rack-Unit (RU), 8-slot chassis with the flexibility of 100G or 400G Line-Card Expansion Modules (LEMs) offering 128 ports of 100G or 32 ports of 400G. The Cisco Nexus 3408-S is the industry’s highest port radix in a compact and energy-efficient form factor. The Cisco Nexus 3408-S supports HVAC/DC power inputs with forward airflow direction.The Cisco Nexus 3408-S has the following hardware configuration:
• 4RU, 8-slot chassis
• NXM-X16C LEM with 16 ports of Quad-Small-Form-Factor 28 (QSFP28)
• NXM-X4D LEM with 4 ports of Quad Small Form-Factor Pluggable – Double Density (QSFP-DD)
• Beacon LED
• Status LED
• Dual-redundant power supplies
• Redundant (2+1) fans
• Two 100/1000-Mbps SFP ports
• One RS-232 console port
• One RJ45 and one SFP Management port
• One USB port
  The 100G LEMs are 16 ports of QSFP28 supporting 100, 50, 40, 25, and 10G speeds.The 400G LEMs are 4 ports of QSFP-DD that are backward-compatible with QSFP+, QSFP28, and QSFP56. Each QSFP-DD port can operate at 400, 100, 50, 40, and 25 Gbps.

  The Modules, License and Accessories

  Table 3 shows the recommended products.

  Part number	Description
  NXM-X16C	Nexus 100G Line Expansion Module
  NXM-X4D	Nexus 400G Line Expansion Module
  NXM-XBLNK	Nexus Blank Line Expansion Module
  NXA-FAN-300CFM-PI	Nexus fan, forward airflow (port-side intake)
  NXA-PHV-2KW-PI	Nexus 2KW HV power supply, forward airflow (port-side intake)
  NXA-PDC-2KW-PI	Nexus 2KW DC power supply, forward airflow (port-side intake)
  NXA-PAC-2KW-PI	Nexus 2KW AC power supply, forward airflow (port-side intake)
  N3K-LAN3K9	Nexus 3408-S layer 3 LAN Enterprise License

  Compare to Similar Item

  Table 4 shows the comparison.

  SKU	N3K-C3408-S	N3K-C3432D-S
  Physical	4 RU, 8-slot chassis Beacon LED Status LED Dual-redundant power supplies Redundant (2+1) fans Two 100/1000Mbps SFP ports One RS-232 serial console port One RJ45 and one SFP management port One USB port	32 fixed 400-Gigabit-Ethernet QSFP-DD ports Beacon LED Status LED Dual-redundant power supplies Redundant (5+1) fans Two 100/1000Mbps SFP ports in front (ports 33 and 34) One RS-232 serial console port One RJ45 and one SFP management port One USB port
  Performance	25.6-Tbps switching capacity	25.6 Tbps switching capacity
  Dimensions (height x width x depth)	6.97 in. x 17.3 in. x 31.6 in.	1.75 x 17.29 x 25.4 in. (4.44 x 43.91 x 64.51cm)