Cisco Catalyst C3850-24XU-S Managed L3 Switch - 24 Ethernet Ports UPOE
Cisco Catalyst 3850 24 Port LAN Base
This is the power of the Cisco® Digital Network Architecture (Cisco DNA™).
Cisco DNA is a monumental shift on how to design and build networks. The Cisco Catalyst® 3850 Series, as part of the Cisco DNA portfolio of next-generation enterprise-class stackable Ethernet and Multigigabit Ethernet access and aggregation layer switches, securely enables time-saving virtualization, greater automation, and valuable analytics data that directly address your evolving business needs, including less cost to install and operate.
The Cisco Catalyst 3850 Series provides capabilities that ideally suited to support the convergence of wired and wireless access. The new Cisco Unified Access Data™ Plane (UADP) Application-Specific Integrated Circuit (ASIC) powers the switch and enables uniform wired-wireless policy enforcement, application visibility, flexibility, and application optimization. This convergence is built on the resilience of the new and improved Cisco StackWise®-480 technology.
The Cisco Catalyst 3850 Series Switches support full IEEE 802.3at Power over Ethernet Plus (PoE+), Cisco Universal Power Over Ethernet (Cisco UPOE®), modular and field-replaceable network modules, RJ-45 and fiber-based downlink interfaces, and redundant fans and power supplies.
Product overview
● Integrated wireless controller capability with:
◦ Up to 40G of wireless capacity per switch (48-port RJ45 models)
◦ Support for up to 100 access points and 2000 wireless clients on each switching entity (switch or stack)
● 24 and 48 10/100/1000Mbps data PoE+ and Cisco UPOE models with Energy-Efficient Ethernet (EEE)
● 24 and 48 100Mbps/1/2.5/5/10 Gbps Cisco UPOE models with Energy-Efficient Ethernet (EEE)
● 12- and 24-port 1 Gigabit Ethernet SFP-based models
● 12- and 24-port 1/10 Gigabit Ethernet SFP+-based models
● 48-port 1/10 Gigabit Ethernet SFP+ model with 4 fixed 40 Gigabit Ethernet QSFP+ uplinks
● Cisco StackWise-480 technology provides scalability and resiliency with 480 Gbps of stack throughput[1]
● Cisco StackPower® technology provides power stacking among stack members for power redundancy1
● Five optional uplink modules[2] with 4 x Gigabit Ethernet, 2 x 10 Gigabit Ethernet, 4 x 10 Gigabit Ethernet[3], 8 x 10 Gigabit Ethernet4, or 2 x 40 Gigabit Ethernet QSFP+[4] ports
● Dual redundant, modular power supplies and three modular fans providing redundancy
● Full IEEE 802.3at (PoE+) with 30W power on all copper ports in 1 Rack Unit (RU) form factor
● Cisco UPOE with 60W power per port in 1 Rack Unit (RU) form factor
● IEEE 802.3bz (2.5/5 G/s BASE-T) to go beyond 1 Gb/s with existing Cat5e and Cat6
● IEEE 802.1ba AV Bridging (AVB) built-in to provide better AV experience for including improved time synchronization and QoS
● Software support for IPv4 and IPv6 routing, multicast routing, modular Quality of Service (QoS), Flexible NetFlow (FNF), and enhanced security features
● Single universal Cisco IOS® Software image across all license levels, providing an easy upgrade path for software features
● Cisco DNA services delivered through Cisco ONE™ Software, providing simplified, high-value solutions with license portability and flexibility
● Support for AES-256 with the powerful MACSEC 256-bit for SFP+ and Multigigabit models and 128-bit encryption algorithm available on all models
● Enhanced Limited Lifetime Warranty (E-LLW) with Next Business Day (NBD) advance hardware replacement and 90-day access to Cisco Technical Assistance Center (TAC) support
Switch models and configurations
Table 1 shows the Cisco Catalyst 3850 Series configurations.
Table 1. Cisco Catalyst 3850 Series configurations
| Model | Total 10/100/1000 or SFP or SFP+ ports | Default AC power supply | Available PoE power | StackWise-480 | StackPower |
| WS-C3850-24T | 24 | 350WAC | - | Yes | Yes |
| WS-C3850-48T | 48 |
| WS-C3850-24P | 24 PoE+ | 715WAC | 435W |
| WS-C3850-48P | 48 PoE+ |
| WS-C3850-48F | 48 PoE+ | 1100WAC | 800W |
| WS-C3850-24U | 24 UPOE | 1100WAC | 800W |
| WS-C3850-48U | 48 UPOE | 1100WAC | 800W |
| WS-C3850-24XU | 24 UPOE (100Mbps/1/2.5/5/10 Gbps) | 1100WAC | 580W |
| WS-C3850-12X48U | 48 UPOE (with 12 100Mbps/1/2.5/5/10 Gbps Ports) | 1100WAC | 630W |
| WS-C3850-12S | 12 SFP | 350WAC | |
| WS-C3850-24S | 24 SFP |
| WS-C3850-12XS | 12 1/10G SFP+ | 350WAC | - |
| WS-C3850-24XS | 24 1/10G SFP+ | 715 WAC | - |
| WS-C3850-48XS | 48 1/10G SFP+ | 750WAC (front to back) | - | No | No |
Network modules
The Cisco Catalyst 3850 Series Switches support five optional network modules for uplink ports. The default switch configuration does not include the network module. At the time of switch purchase the customer has the flexibility to choose from the network modules described in Table 2.
Figure 5 shows the following network modules:
● 4 x Gigabit Ethernet with Small Form-Factor Pluggable (SFP) receptacles
● 2 x 10 Gigabit Ethernet with SFP+ or 4 x Gigabit Ethernet with SFP receptacles
● 4 x 10 Gigabit Ethernet with SFP+ receptacles (supported only on the 48-port Gigabit Ethernet models or on the 12-port or higher 10 Gigabit Ethernet models)
The C3850-NM-4-10G module is supported only on the 48-port Gigabit Ethernet models or on the 12-port or higher 10 Gigabit Ethernet models. The C3850-NM-8x10G and C3850-NM-2x40G modules are supported on the 24-port and 48-port multigigabit switches and also on the 24-port 10G SFP+ switch model. The C3850-NM-4-1G and C3850-NM-2-10G modules are not supported on the 12-port and 24-port SFP+ models.
Table 2. Network module compatibility matrix
| Model | Network modules |
| WS-C3850-24T | C3850-NM-4-1G, C3850-NM-2-10G |
| WS-C3850-48T | C3850-NM-4-1G, C3850-NM-2-10G, C3850-NM-4-10G |
| WS-C3850-24P | C3850-NM-4-1G, C3850-NM-2-10G |
| WS-C3850-48P | C3850-NM-4-1G, C3850-NM-2-10G, C3850-NM-4-10G |
| WS-C3850-48F | C3850-NM-4-1G, C3850-NM-2-10G, C3850-NM-4-10G |
| WS-C3850-24U | C3850-NM-4-1G, C3850-NM-2-10G |
| WS-C3850-48U | C3850-NM-4-1G, C3850-NM-2-10G, C3850-NM-4-10G |
| WS-C3850-24XU | C3850-NM-4-1G, C3850-NM-2-10G, C3850-NM-4-10G, C3850-NM-8-10G, C3850-NM-2-40G |
| WS-C3850-12X48U | C3850-NM-4-1G, C3850-NM-2-10G, C3850-NM-4-10G, C3850-NM-8-10G, C3850-NM-2-40G |
| WS-C3850-12S | C3850-NM-4-1G, C3850-NM-2-10G |
| WS-C3850-24S | C3850-NM-4-1G, C3850-NM-2-10G |
| WS-C3850-12XS | C3850-NM-4-10G |
| WS-C3850-24XS | C3850-NM-4-10G, C3850-NM-8-10G, C3850-NM-2-40G |
| WS-C3850-48XS | None |
An SFP+ receptacle supports both 10 Gigabit Ethernet and Gigabit Ethernet modules, allowing customers to use their investment in Gigabit Ethernet SFP modules and upgrade to 10 Gigabit Ethernet when business demands change without having to do a comprehensive upgrade of the access switch. In contrast, SFP receptacles can be used only as Gigabit Ethernet ports, as shown in the examples in Table 3.
Table 3. Network module configuration examples
| | Interface options |
| Network module | 10 Gigabit Ethernet SFP+ ports | Gigabit Ethernet SFP ports |
| 4 x Gigabit Ethernet | 0 | 4 |
| 4 x Gigabit Ethernet/2 x10 Gigabit Ethernet network modules | 2 | 0 |
| 1 | 3 |
| 2 | 2 |
| 0 | 4 |
| 4 x Gigabit Ethernet/4 x10 Gigabit Ethernet network modules | 4 | 0 |
| 0 | 4 |
| 2 | 2 |
| 3 | 1 |
| 1 | 3 |
Dual redundant modular power supplies
The Cisco Catalyst 3850 Series Switches support dual redundant power supplies.[6] The switch ships with one power supply by default, and the second power supply can be purchased at the time of ordering the switch or at a later time. If only one power supply is installed, it should always be in power supply bay 1. The switch also ships with three field-replaceable fans.
Table 4 shows the different power supplies available in these switches and available PoE power.
Table 4. Power supply models
| Model | Default power supply | Available PoE power |
| 24-port data switch | PWR-C1-350WAC | - |
| 48-port data switch |
| 24-port PoE switch | PWR-C1-715WAC | 435W |
| 48-port PoE switch |
| 48-port full PoE switch | PWR-C1-1100WAC | 800W |
| 24-port UPOE switch | PWR-C1-1100WAC | 800W |
| 48-port UPOE switch |
| 24-port Multigigabit UPOE switch | PWR-C1-1100WAC | 580W |
| 48-port Multigigabit UPOE switch | PWR-C1-1100WAC | 630W |
| 12-port SFP switch | PWR-C1-350WAC | - |
| 24-port SFP switch |
| 12-port SFP+ switch | PWR-C1-350WAC | - |
| 24-port SFP+ switch | PWR-C1-715WAC | - |
| 48-port SFP+ switch (WS-C3850-48XS-S and WS-C3850-48XS-E) | PWR-C3-750WAC-R | - |
| 48-port SFP+ switch (WS-C3850-48XS-F-S and WS-C3850-48XS-F-E) | PWR-C3-750WAC-F | - |
In addition to the power supplies listed in Table 5, a 440WDC power supply is available as a configuration option and also as a spare (that is, it can be ordered separately) on all switch models. The DC power supply also delivers PoE capabilities for maximum flexibility (refer to Table 6 for available PoE budget with DC power supplies). Customers can mix and match the AC and DC power supplies in the two available power supply slots. Any of these power supplies can be installed in any of the switches.
Table 5. Available PoE with DC power supply
| Model | Number of 440WDC power supplies | Total available PoE budget |
| 24-port PoE switch | 1 | 220W |
| 2 | 660W |
| 48-port PoE switch | 1 | 185W |
| 2 | 625W |
| 24-port Multigigabit UPOE switch | 2 | 360W |
| 48-port Multigigabit UPOE switch | 2 | 410W |
Power over Ethernet Plus (PoE+)
In addition to PoE (IEEE 802.3af), the Cisco Catalyst 3850 Series Switches support PoE+ (IEEE 802.3at standard), which provides up to 30W of power per port. The Cisco Catalyst 3850 Series Switches can provide a lower Total Cost of Ownership (TCO) for deployments that incorporate Cisco IP phones, Cisco Aironet®wireless LAN (WLAN) access points, or any IEEE 802.3at-compliant end device. PoE removes the need for wall power to each PoE-enabled device and eliminates the cost for additional electrical cabling and circuits that would otherwise be necessary in IP phone and WLAN deployments. Table 7 shows the power supply combinations required for different PoE needs.
Table 6. Power supply requirements for PoE and PoE+
| | 24-port PoE switch | 48-port PoE switch |
| PoE on all ports (15.4W per port) | One PWR-C1-715WAC | One PWR-C1-1100WAC or two PWR-C1-715WAC |
| PoE+ on all ports (30W per port) | One PWR-C1-1100WAC or two PWR-C1-715WAC | Two PWR-C1-1100WAC or one PWR-C1-1100WAC and one PWR-C1-715WAC |
Cisco Universal Power over Ethernet (Cisco UPOE)
Cisco UPOE (Table 8) is a breakthrough technology, offering the following services and benefits.
● 60W per port to enable a variety of end devices such as Samsung VDI client, BT IP turret systems in trading floors, Cisco Catalyst compact switches in retail/hospitality environments, personal Cisco TelePresence® systems, and physical access control devices
● High availability for power and guaranteed uninterrupted services, a requirement for critical
applications (e911)
● Lowering OpEx by providing network resiliency at lower cost by consolidating backup power into
the wiring closet
● Faster deployment of new campus access networking infrastructures by eliminating the need for a power outlet for every endpoint
Table 7. Power supply requirements for Cisco UPOE
| | 24-port UPOE switch | 48-port UPOE switch | 24-port Multigigabit UPOE switch | 48-port multigigabit UPOE switch |
| UPOE (60W per port) on all (24 port switch) or max. 30 ports (48 port switch) | One PWR-C1-1100WAC and one PWR-C1-715WAC | Two PWR-C1-1100WAC | Two PWR-C1-1100WAC | Two PWR-C1-1100WAC |
Cisco Catalyst Multigigabit Ethernet technology
Cisco Multigigabit Ethernet is a unique Cisco innovation to the new Cisco Catalyst Ethernet access switches. With the enormous growth of 802.11ac and new wireless applications, wireless devices are promoting the demand for more network bandwidth. This creates a need for a technology that supports speeds higher than 1 Gbps on all cabling infrastructure. Cisco Multigigabit technology allows you to achieve bandwidth speeds from 1 Gbps through 10 Gbps over traditional Cat 5e cabling or above. In addition, the Multigigabit ports on select Cisco Catalyst switches support UPOE, which is increasingly important for next-generation workspaces and Internet of Things (IoT) ecosystems.
Cisco Multigigabit technology offers significant benefits for a diverse range of speeds, cable types, and PoE power. The benefits can be grouped into three different areas:
● Multiple speeds: Cisco Multigigabit technology supports autonegotiation of multiple speeds on switch ports. The supported speeds are 100 Mbps, 1 Gbps, 2.5 Gbps, and 5 Gbps on Cat 5e cable and up to 10 Gbps over Cat 6a cabling.
● Cable type: The technology supports a wide range of cable types, including Cat 5e, Cat 6, and Cat 6a or above.
● PoE power: The technology supports PoE, PoE+, and UPOE for all the supported speeds and cable types.
For more information, visit https://www.cisco.com/c/en/us/solutions/enterprise-networks/catalyst-multigigabit-switching/index.html.
SD-Access architecture
What if you could give time back to IT? And provide network access in minutes for any user or device to any application – without compromise?
Cisco Software-Defined Access (SD-Access) is the industry’s first intent-based networking solution for the enterprise, built on the principles of Cisco’s Digital Network Architecture (Cisco DNA™). SD-Access provides automated, end-to-end segmentation to separate user, device, and application traffic without the need to redesign the network. SD-Access automates user access policy so organizations can make sure the right policies are established for any user or device with any application across the network. This is accomplished with a single network fabric across LAN and WLAN, which creates a consistent user experience anywhere without compromising on security.
Organizations have many challenges today in managing the network to drive business outcomes. These limitations are due to manual configuration and fragmented tool offerings. SD-Access provides:
● A transformational management solution that reduces operational expenses and enhances business agility
● Consistent management of wired and wireless network provisioning and policy
● Automated network segmentation and group-based policy
● Co
Volume Discount 
