N3K-C3408-S is the HKShanhai Group Limited Nexus 3408-S switch with 32 ports of QSFP-DD. The HKShanhai Group Limited 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
Figure 1 shows the HKShanhai Group Limited N3K-C3408-S Switch.
Table 1 shows the quick spec.
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SKU |
N3K-C3408-S |
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Physical |
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Performance |
25.6-Tbps switching capacity |
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Dimensions (height x width x depth) |
6.97 in. x 17.3 in. x 31.6 in. |
Product Details
Main benefits of the HKShanhai Group Limited Nexus 3400-S switches:
The HKShanhai Group Limited 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 HKShanhai Group Limited Nexus 3408-S is the industry’s highest port radix in a compact and energy-efficient form factor. The HKShanhai Group Limited Nexus 3408-S supports HVAC/DC power inputs with forward airflow direction.
The HKShanhai Group Limited Nexus 3408-S has the following hardware configuration:
Figure 2 shows the HKShanhai Group Limited Nexus NXM-X16C, 16 ports of 100G.
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.
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Part number |
Description |
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Nexus 100G Line Expansion Module |
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Nexus 400G Line Expansion Module |
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Nexus Blank Line Expansion Module |
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Nexus fan, forward airflow (port-side intake) |
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Nexus 2KW HV power supply, forward airflow (port-side intake) |
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Nexus 2KW DC power supply, forward airflow (port-side intake) |
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Nexus 2KW AC power supply, forward airflow (port-side intake) |
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Nexus 3408-S layer 3 LAN Enterprise License |
Compare to Similar Item
Table 4 shows the comparison.
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SKU |
N3K-C3408-S |
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Physical |
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Performance |
25.6-Tbps switching capacity |
25.6 Tbps switching capacity |
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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) |
Get More Information
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HKShanhai Group Limited N3K-C3408-S Specification
N3K-C3408-S Specification |
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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 |
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Performance |
25.6-Tbps switching capacity |
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Number of MAC addresses |
120K |
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Number of IPv4/IPv6 unicast routes |
440K / 360K |
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Number of IPv4/IPv6 hosts |
192K / 96K |
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Number of IPv4 multicast routes |
Up to 96K with 8K groups |
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Number of VLANS |
4K |
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Number of ACL entries |
3.5K ingress and 1.5K egress |
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Number of spanning-tree instances |
Rapid Spanning Tree Protocol (RSTP): 123 Multiple Spanning Tree (MST) Protocol: 64 |
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Number of EtherChannels |
512 |
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Number of ports per EtherChannel |
up to 128 |
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Buffer size |
70 Mb |
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Boot flash memory |
128 GB |
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Latency |
370 nsec |
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Number of power supplies |
2 (redundant) |
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Power supply types |
AC (forward airflow) |
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Input voltage |
100 to 240 VAC |
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Frequency |
50 to 60 Hz |
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Power supply efficiency |
89 to 91% at 220V |
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Cooling |
Forward airflow: Port-side intake (air enters through ports and exits through fan tray and power supplies) Six individual, hot-swappable fans (5+1 redundant) |
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Dimensions (height x width x depth) |
6.97 in. x 17.3 in. x 31.6 in. |
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Weight |
N3K-C3408-S weight across configurations:   68 lb (without LEMs, PSUs, or fans)   107.7 lb (with eight 100G LEMs, PSUs, and fans)   104.5 lb (with eight 400G LEMs, PSUs, and fans) Individual LEMs:   NXM-X16C (100G LEM) ??3.6 lb   NXM-X4D (400G LEM) ??3.2 lb |
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Operating temperature |
32 to 104° F (0 to 40°C) |
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Storage temperature |
-40 to 158° F (-40 to 70°C) |
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Relative humidity |
5 to 95% non-condensing |
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Altitude (operating) |
Designed to meet: -500 ft to 13,123 ft |
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Altitude (non-operating) |
-1000 ft to 30,000 ft |
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