Chapter 2 Switch Installation

Connecting Devices to the Ethernet Ports

Table 2-2

Recommended Ethernet Cables (When Auto-MDIX is Disabled)

 

 

 

 

Device

 

Crossover Cable1

Straight-Through Cable1

Switch to switch

Yes

No

 

 

 

 

Switch to hub

 

Yes

No

 

 

 

Switch to computer or server

No

Yes

 

 

 

Switch to router

No

Yes

 

 

 

Switch to IP phone

No

Yes

 

 

 

 

1.100BASE-TX and 1000BASE-T traffic requires twisted four-pair, Category 5, Category 5e, or Category 6 cable. 10BASE-T traffic can use Category 3 or Category 4 cable.

PoE+ and Cisco UPOE Port Connections

The 10/100/1000 PoE+ and Cisco UPOE ports have the same autonegotiation settings and cabling requirements that are described in the “10/100/1000 Ethernet Port Connections” section on page 2-19. These ports can provide PoE, PoE+, or Cisco UPOE inline power.

PoE inline power supports devices compliant with the IEEE 802.3af standard, as well as prestandard Cisco IP Phones and Cisco Aironet Access Points. Each port can deliver up to 15.4 W of PoE.

PoE+ inline power supports devices compliant with the IEEE 802.3at standard, by delivering up to 30 W of PoE+ power per port to all switch ports.

See Table 1-15 on page 1-19for the power supply modules required to support PoE, PoE+, and Cisco UPOE on 24- and 48-port switches.

For more information about the required power-supply module and the PoE specifications, see the “Power Supply Modules” section on page 1-18and Appendix A, “Technical Specifications.”

Note Many legacy powered devices, including older Cisco IP phones and access points that do not fully support IEEE 802.3af, might not support PoE when connected to the switches by a crossover cable.

Caution PoE faults are caused when noncompliant cabling or powered devices are connected to a PoE port. Use only standard-compliant cabling to connect Cisco prestandard IP Phones, wireless access points, or IEEE 802.3af-compliant devices to PoE ports. A cable or device that causes a PoE fault must be removed from the network.

Warning Voice over IP (VoIP) service and the emergency calling service do not function if power fails or is disrupted. After power is restored, you might have to reset or reconfigure equipment to regain access to VoIP and the emergency calling service. In the USA, this emergency number is 911. You need to be aware of the emergency number in your country. Statement 361

 

Catalyst 3850 Switch Hardware Installation Guide

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Cisco Systems WSC385024TS, C3850NM210G, C3850NM41G manual PoE+ and Cisco Upoe Port Connections, Device Crossover Cable
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C3850NM41G, C3850NM210G, WSC385024TS specifications

Cisco Systems is a global leader in networking and telecommunications hardware, and its Catalyst series of switches are widely recognized for their innovation, reliability, and performance. Among the numerous models available, the Cisco WSC385024TS, C3850NM41G, and C3850NM210G stand out for their advanced features and capabilities tailored to meet the needs of modern enterprises.

The Cisco WSC385024TS is a stackable switch that offers 24 ports, and it is built on Cisco's IOS XE software. It is designed for high-density environments, making it ideal for organizations that require robust connectivity and scalability. This model supports advanced Layer 2 and Layer 3 features and facilitates intelligent traffic management through Quality of Service (QoS). One of its standout features is the ability to stack up to nine switches together, enabling centralized management and increased fault tolerance. The WSC385024TS also integrates security features such as 802.1X authentication and access control lists, which are essential for maintaining a secure network infrastructure.

The C3850NM41G is a versatile switch that comes with 41 Gigabit Ethernet ports, making it suitable for environments that demand high-speed connectivity. This model supports Cisco's innovative StackWise-480 technology, which provides increased bandwidth and reliable inter-switch communication. Additionally, it features Power over Ethernet (PoE) capabilities, allowing it to deliver power to connected devices such as IP phones and wireless access points, thereby simplifying cabling and reducing the need for additional power sources. The C3850NM41G is also equipped with built-in automatic fault detection and recovery, enhancing the overall resilience of the network.

Lastly, the C3850NM210G model offers 210 Gbps of switching capacity, making it ideal for data-intensive applications. This switch combines performance with security, supporting various security protocols such as Virtual Routing and Forwarding (VRF) and Dynamic Host Configuration Protocol (DHCP) snooping to protect against malicious activity. With its modular design, the C3850NM210G allows for easy upgrades and expansions, facilitating adaptive network growth.

In summary, the Cisco WSC385024TS, C3850NM41G, and C3850NM210G switches provide advanced features, robust performance, and high scalability, making them ideal choices for businesses aiming to enhance their network infrastructure while supporting cutting-edge technologies. Whether for small businesses or large enterprises, these models exemplify Cisco's commitment to delivering high-quality networking solutions that adapt to the evolving demands of today's digital landscape.
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