HPE Aruba Networking CX 4100i JL818A 24-Port 802.3bt PoE Switch with 4x 1/10G SFP+ (1U Industrial)
- Managed, Rack-mountable, 24 x 1G ports, Fixed Uplinks (4 x SFP+), PoE+ (240W), Layer 2
Overview
HPE positions the CX 4100i Switch Series as a modern family of ruggedized Ethernet switches for connecting IoT, access points and user devices in harsh environments: IP30 hardware rated for extended temperatures, IEC 61850-3 and IEEE 1613 compliance for substations, EN 50155 for railway use, and no switch software licensing requirements. The JL818A is the 24-port 1U rack model: four Class 6 and twenty Class 4 PoE ports, four 1/10G SFP+ uplinks, and a fixed internal supply whose 240 W PoE budget HPE states with no derating. Its passive, fanless cooling and 19-inch or wall mounting suit industrial racks and enclosures, while the 12-port JL817A covers DIN-rail cabinets with external supplies.
Technical Details
The HPE Aruba Networking CX 4100i JL818A is a Layer 2+ managed, fanless 1U rackmount industrial switch with 24 Gigabit (100M/1G) access ports and four 1/10G SFP+ uplinks, running the HPE Aruba Networking CX Operating System. Switching capacity is up to 128 Gbps and forwarding rate is up to 95 Mpps. Four ports deliver IEEE 802.3bt Class 6 PoE at up to 60 W and twenty deliver Class 4 at up to 30 W, from a 240 W PoE budget with no derating on its fixed internal 300 W power supply. It supports 4-member VSF stacking per the QuickSpecs. It operates from -40 to 60 °C in still air, to 70 °C at 0.2 m/s and -34 to 75 °C at 1 m/s airflow with industrial-temperature transceivers, serving PLCs, HMIs, drives, ruggedized IP cameras and industrial access points.
Best For
The JL818A suits industrial racks and enclosures on factory floors, in substations and in traffic or railway installations that need 24 ports of 802.3bt and 802.3at PoE for devices such as PLCs, HMIs, drives, ruggedized IP cameras and industrial wireless access points. A 240 W PoE budget is suitable for mixed deployments of these powered devices; actual device counts depend on each device's power draw. It runs from -40 to 60 °C with no airflow, -40 to 70 °C at 0.2 m/s airflow and -34 to 75 °C at 1 m/s airflow with industrial-temperature transceivers.
Not suitable if:
- you need redundant or DC power input, since this model uses a single fixed internal AC power supply
- you need DIN-rail mounting, since this model mounts in a 19-inch rack or on a wall
- you need full dynamic routing such as BGP, since the documented routing on this switch is static IPv4 and IPv6
- you need protection against liquids, since the IP30 rating covers tools and wires larger than 2.5 mm but not liquids
- you need multigigabit access ports, since the access ports are 100M/1G
JL818A Specifications
| Class & Licensing | |
|---|---|
| License Tier | None (no switch software licensing required; no feature tiers) |
| License Detail / MTBF | None (no switch software licensing required; no feature tiers; a separate software license is required only for HPE Aruba Networking Switch Multi-Edit); MTBF not published |
| Ports & Uplinks | |
| PoE Budget | 240 W, no derating (fixed internal 300 W power supply); 4x IEEE 802.3bt Class 6 (60 W) + 20x Class 4 (30 W) ports |
| Port Speed | Gigabit (100M/1G BASE-T) |
| Uplink Configuration | 4x 1/10G SFP+ (fixed) |
| Performance & Scale | |
| Stacking | VSF |
| Switching Capacity | Up to 128 Gbps |
| Forwarding Rate | Up to 95 Mpps |
| MAC Table | 8,192 entries |
| Max Stack Members | 4 |
| Hardware & Memory | |
| DRAM | 4 GB DDR3 |
| Flash | 32 GB eMMC |
| Power & Thermal | |
| Power Input / PSU | Fixed internal 300 W power supply; 100-240 VAC, 50/60 Hz; C15 connector |
| Redundant PSU | No (fixed internal power supply) |
| Cooling | Fanless |
| Physical & Environmental | |
| Dimensions (H x W x D) | 1.73 x 17.5 x 12.0 in (4.4 x 44.45 x 30.44 cm) |
| Weight | 14.33 lbs (6.50 kg) |
| Operating Temperature | -40 to 140 °F (-40 to 60 °C) at 0 m/s (0 LFM); -40 to 158 °F (-40 to 70 °C) at 0.2 m/s (40 LFM); -29.2 to 167 °F (-34 to 75 °C) at 1 m/s (200 LFM); up to 13,800 ft (4.2 km); derated to 50 °C if non-industrial-temperature or UTM transceivers are used |
| Software | |
| Operating System | HPE Aruba Networking CX Operating System |
FAQ
How much PoE does the HPE Aruba Networking CX 4100i JL818A provide?
The HPE Aruba Networking CX 4100i JL818A has four IEEE 802.3bt Class 6 ports at up to 60 W and twenty Class 4 ports at up to 30 W, drawing on a 240 W PoE budget from its fixed internal 300 W power supply. HPE states the 240 W with no derating, and describes the internal supply as supporting up to 240 W of PoE from -40 to +70 °C. Because the ports together could ask for more than 240 W, the budget decides how many devices draw full power.
What are the operating temperature and environmental ratings of the JL818A?
The JL818A operates from -40 to 60 °C with no airflow, -40 to 70 °C at 0.2 m/s airflow and -34 to 75 °C at 1 m/s airflow, up to 4.2 km (13,800 ft), when HPE's industrial-temperature transceivers are used; otherwise HPE derates it to 50 °C. It is fanless and rated EN 60529 IP30, which HPE describes as protection from tools and wires larger than 2.5 mm, not from liquids. HPE lists vibration to IEC 60068-2-6 and 64, operational shock to IEC 60068-2-27 (30 G, 18 ms, half-sine), non-operational shock of 50 G, 11 ms, EN 50155 and IEC 61373 railway mounting compliance, IEC 61850-3 and IEEE 1613 substation compliance, and EN 61000-4-5 surge of 2 kV/4 kV (UTP).
How is the JL818A powered and mounted?
The JL818A has a fixed internal 300 W power supply for 100-240 VAC, 50/60 Hz, with a C15 power inlet; HPE lists no DC input or second supply for this model. It mounts in an EIA/TIA 19-inch rack with the brackets included, and HPE also allows wall mounting flush against the wall with the ports facing down only. The chassis is 1U (4.4 cm) high, 44.45 cm wide and 30.44 cm deep, and weighs 14.33 lb.
What transceivers do the JL818A uplinks use?
The JL818A has four 1/10G SFP+ uplink ports, so optics faster than 10G are not supported. For the full -40 to 70 °C range HPE requires its industrial-temperature transceivers (1G SFP SX and LX, 10G SFP+ SR and LR I-Temp). Standard transceivers are supported for 0 to 50 °C, and HPE states that the switch is derated to 50 °C if non-industrial or Unsupported Transceiver Mode optics are used, and HPE does not support the optic in that mode. Transceivers are sold separately.
Can the JL818A be stacked?
Yes, per HPE's CX 4100i QuickSpecs, which lists 4-member VSF (Virtual Switching Framework) stacking for the series, managed as a single chassis. The CX 4100i data sheet does not cover stacking, and neither document gives a stacking bandwidth. For link and ring resilience HPE also lists IEEE 802.3ad LACP with up to 8 LAGs of up to 8 links each, MSTP and RSTP, UDLD, Ethernet Ring Protection Switching (ERPS) and always-on PoE during reboots and firmware upgrades.
What is the difference between the JL818A and the JL817A?
The JL818A is the 24-port 1U rack model with 4 Class 6 and 20 Class 4 PoE ports, four 1/10G SFP+ uplinks, up to 128 Gbps and 95 Mpps, and a fixed internal 300 W supply giving 240 W of PoE with no derating. The JL817A is the 12-port DIN-rail model with 4 Class 6 and 8 Class 4 PoE ports, two 1/10G SFP+ uplinks, up to 64 Gbps and 46 Mpps, and one or two external DIN supplies that set a PoE budget of up to 360 W (JL820A, below 50 °C). Both are fanless, IP30 and share the same temperature table.
How is the JL818A managed?
The JL818A is a managed switch running the HPE Aruba Networking CX Operating System. HPE lists a web GUI, an industry-standard CLI, REST APIs, Dynamic Segmentation for role-based policy, HPE Aruba Networking Switch Multi-Edit (which requires its own separate software license) and HPE Aruba Networking Central, an optional management subscription. HPE states that no switch software licensing is required. Routing is static IPv4 and IPv6.
What condition is the JL818A sold in, and what warranty applies?
The JL818A is sold new and factory-sealed. It is covered by the Network Devices Inc. 1-year warranty and a 30-day return policy.
