Cisco Catalyst 3850 Series

Figure 1.  Cisco Catalyst 3850 Series Switches


Product Overview

      • Integrated wireless controller capability with:
            – Up to 40G of wireless capacity per switch (48-port models)
            – Support for up to 50 access points and 2000 wireless clients on each switching entity (switch or stack)
      • 24 and 48 10/100/1000 data PoE+ and Cisco UPOE models with energy-efficient Ethernet (EEE)
            – Cisco StackWise-480 technology provides scalability and resiliency with 480 Gbps of stack throughput
            – Cisco StackPower™ technology provides power stacking among stack members for power redundancy
            – Three optional uplink modules with 4 x Gigabit Ethernet, 2 x 10 Gigabit Ethernet, or 4 x 10 Gigabit Ethernet ports
            – Dual redundant, modular power supplies and three modular fans providing redundancy
            – Full IEEE 802.3at (PoE+) with 30W power on all ports in 1 rack unit (RU) form factor
            – Cisco UPOE with 60W power per port in 1 rack unit (RU) form factor
      • Software support for IPv4 and IPv6 routing, multicast routing, modular quality of service (QoS), Flexible NetFlow (FNF) Version 9, and enhanced security features
      • Single universal Cisco IOS® Software image across all license levels, providing an easy upgrade path for software features
      • 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

Table 1. Cisco Catalyst 3850 Series Configurations

Models Total 10/100/1000 Ethernet Ports Default AC Power Supply Available PoE Power StackPower
WS-C3850-24T 24 350 WAC - Yes
WS-C3850-48T 48
WS-C3850-24P 24 PoE+ 715 WAC 435W
WS-C3850-48P 48 PoE+
WS-C3850-48F 48 PoE+ 1100 WAC 800W
WS-C3850-24U 24 UPOE 1100 WAC 800W
WS-C3850-48U 48 UPOE 1100 WAC 800W

Network Modules

The Cisco Catalyst 3850 Series Switches support three optional network modules for uplink ports. The default switch configuration doesn't include the uplink module. At the time of switch purchase the customer has the flexibility to choose from the network modules described in Table 2.

Figure 2 shows various network modules:
      • 4 x Gigabit Ethernet with Small Form-Factor Pluggable (SFP)
      • 2 x 10 Gigabit Ethernet with SFP+ or 4 x Gigabit Ethernet with SFP
      • 4 x 10 Gigabit Ethernet with SFP+ (supported on the 48-port models only)

Figure 2. Network Modules with Four Gigabit Ethernet, Two 10 Gigabit Ethernet SFP+, or Four 10 Gigabit Ethernet SFP+ Interfaces

Table 2. Network Module Numbers and Descriptions

Product Number Product Description
C3850-NM-4-1G 4 x Gigabit Ethernet network modules
C3850-NM-2-10G 4 x Gigabit Ethernet/2 x 10 Gigabit Ethernet network modules
C3850-NM-4-10G 4 x Gigabit Ethernet/4 x 10 Gigabit Ethernet network modules

Figure 3. Dual Redundant Power Supplies

Table 3. Power Supply Models

Models 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

Table 4. Power Supply Requirements for PoE ,PoE+ , UPOE

  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
  24-Port UPOE Switch 48-Port 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

Figure 5. StackWise-480 and StackPower Connectors

StackPower can be deployed in either power-sharing mode or redundancy mode. In power-sharing mode, the power of all the power supplies in the stack is aggregated and distributed among the switches in the stack. In redundant mode, when the total power budget of the stack is calculated, the wattage of the largest power supply is not included. That power is held in reserve and used to maintain power to switches and attached devices when one power supply fails, enabling the network to operate without interruption. Following the failure of one power supply, the StackPower mode becomes power sharing.

StackPower allows customers to simply add one extra power supply in any switch of the stack and either provide power redundancy for any of the stack members or simply add more power to the shared pool. StackPower eliminates the need for an external redundant power system or installation of dual power supplies in all the stack members. StackPower is available in LAN Base license level (or higher). For LAN Base, cables need to be purchased separately.