Cisco Systems C3850NM41G 10/100/1000 Port Connections, PoE and PoE+ Port Connections, SFP Modules

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Chapter 6 Troubleshooting

Diagnosing Problems

10/100/1000 Port Connections

A port appears to malfunction:

•Verify the status of all ports. See Table 1-5 on page 1-11for descriptions of the LEDs and their meanings.

•Use the show interfaces privileged EXEC command to see if the port is error-disabled, disabled, or shut down. Reenable the port if necessary.

•Verify the cable type. See Appendix B, “Connector and Cable Specifications.”

PoE and PoE+ Port Connections

A powered device connected to a PoE port does not receive power:

•Verify the status of all ports. See Table 1-6and Table 1-10for descriptions of the LEDs and their meanings.

•Use the show interfaces privileged EXEC command to see if the port is error-disabled, or disabled, or shut down. Reenable the port if necessary.

•Verify that the power supply installed in the switch meets the power requirements of your connected devices. See the “Power Supply Modules” section on page 1-18for more information.

•Verify the cable type. 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 switch by a crossover cable. Replace the crossover cable with a straight-through cable.

Caution Noncompliant cabling or powered devices can cause a PoE port fault. Use only compliant cabling to connect Cisco prestandard IP phones, wireless access points, or IEEE 802.3af-compliant devices.

Note The output of the PoE circuit has been evaluated as a limited power source (LPS) per IEC 60950.

SFP Modules

Use only Cisco network modules and SFP modules.

•Inspect the network module and SFP module. Exchange the suspect module with a known good module.

•Verify that the module is supported on this platform. (The switch release notes on Cisco.com list the SFP and SFP+ modules that the switch supports.)

•Use the show interfaces privileged EXEC command to see if the port or module is error-disabled, disabled, or shut down. Reenable the port if needed.

•Make sure that all fiber connections are clean and securely connected.

•For CX1 module connections and fiber connections, make sure that cable routing does not violate the minimum allowed cable bend radius. See the module documentation for specific cabling requirements.

Catalyst 3850 Switch Hardware Installation Guide

 

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Contents Catalyst 3850 Switch Hardware Installation Guide Page N T E N T S Installing and Removing SFP and SFP+ Modules Grounding the Switch Power Supply Module Specifications A-2 Installing the Cisco Microsoft Windows USB Device Driver C-4 Viii Document Conventions PrefacePurpose Related Documentation Obtaining Documentation and Submitting a Service RequestProduct Overview Switch Models, Front Panel, Rear Panel, Management Options,Switch Model Cisco IOS Image Description Switch ModelsSwitch Model Cisco IOS Image Description Front Panel Catalyst 3850-48P-L Switch Front PanelPoE, PoE+, and Cisco Upoe Ports 10/100/1000 Ethernet PortsUSB Mini-Type B Port Management PortsNetwork Modules USB Type a PortNetwork Module Description SFP and SFP+ Modules3 4 5 LEDsColor XPS Status Color System StatusPort LEDs and Modes Mode LED Port Mode DescriptionPort Mode Port LED Color Meaning 10/100/1000/SFP ports Color USB Console LEDColor Description Actv LEDPoE LED Color Status of PoE mode PoE, PoE+, or Cisco UpoeColor Network Module Link Status Network Module LEDsRJ-45 Console Port Status Rear PanelRJ-45 Console Port LED StackWise Ports Power Supply ModulesPoE Option Port Switch Models Default Power Supply Available PoENumber of Power Models Supplies Available PoE PoE Option Port Switch Fan Modules AC-Power Supply Module LEDsDC-Power Supply Module LEDs Fan Module Description StackPower ConnectorRJ-45 Console Port Management OptionsEthernet Management Port Network Configurations Safety Warnings Switch InstallationPreparing for Installation OL-26779-02 Installation Guidelines Verifying Switch Operation Planning a Switch Data StackPowering Off the Switch Tools and EquipmentSwitch Stacking and Power Stacking Guidelines Data Stack Cabling Configurations344185 Data Stack Bandwidth and Partitioning ExamplesExample of a Data Stack with a Failover Condition Power-On Sequence for Switch Data StacksStackPower Stacking Guidelines Planning a StackPower StackPart Number Cable Type Length StackPower Cabling ConfigurationsStackPower Ring Topology StackPower Partitioning Examples Installing the SwitchRack-Mounting 11 Rack-Mounting Brackets Attaching the Rack-Mount Brackets12 Attaching Brackets for 19-inch Racks 13 Mounting the Switch in a Rack Mounting the Switch in a RackTable- or Shelf-Mounting After Installing the SwitchCisco logo Connector screw Connecting to the StackWise Ports16 Connecting the StackPower Cable to a StackPower Port Connecting to the StackPower PortsInstalling and Removing SFP and SFP+ Modules Installing a Network Module in the SwitchConnecting Devices to the Ethernet Ports 10/100/1000 Ethernet Port ConnectionsDevice Crossover Cable PoE+ and Cisco Upoe Port ConnectionsWhere to Go Next OL-26779-02 Overview Installing a Network ModuleCaptive screws Gigabit Ethernet ports Blank module Captive screws Color Link Status Network Module LEDsInstalling Network Modules Installing the Network Module in the Switch C3850-NM-4-1G module Configuring a Network ModuleC3850-NM-4-10G module Interface ActionTenGigabitEthernet GigabitEthenet C3850-NM-2-10G moduleSupported GBICs SFP and SFP+ Modules Installing SFP and SFP+ ModulesRemoving a Network Module Installing an SFP Module in the Network Module Removing SFP or SFP+ Modules Finding the Network Module Serial NumberNetwork Module Serial Number Location Part Number Description Power Supply InstallationPower Supply Module Overview AC OK LED AC Power Supply Module 6 5 DC Power Supply Module LEDs Installation GuidelinesAC Power Supply Module LEDs Installing or Replacing an AC Power Supply Inserting the AC-Power Supply in the Switch Installing a DC Power SupplyEquipment That You Need Grounding the SwitchStripping the Ground Wire 10 Attaching the Ground Lug and Wire Assembly Wiring the DC Input Power Source Installing the DC Power Supply in the Switch12 DC Source a Isolated From Source B with No Common Ground Finding the Power Supply Module Serial Number14 1100-W AC Power Supply Serial Number 16 440-W DC Power Supply Module Serial Number Installing the Fan Installing a Fan Module Fan Module InstallationFinding the Fan Module Serial Number Installing the Fan ModuleFan Module Serial Number Diagnosing Problems TroubleshootingSwitch Post Results Switch LEDsBad or Damaged Cable Switch ConnectionsEthernet and Fiber Cables Link StatusSFP Modules 10/100/1000 Port ConnectionsPoE and PoE+ Port Connections Interface Settings Switch PerformancePing End Device Spanning Tree LoopsCabling Distance Resetting the SwitchAutonegotiation and Network Interface Cards Replacing a Failed Data Stack Member Finding the Switch Serial NumberSwitch Specifications Technical SpecificationsPhysical Specifications Environmental RangesPower Specifications Power Supply Module SpecificationsPower Specifications Operating Specification Fan Module SpecificationsPhysical Specification 10/100/1000 Ports Connector and Cable SpecificationsConnector Specifications SFP and SFP+ Modules Gigabit Ethernet CX1 SFP+ Copper Connectors10/100/1000 Ethernet Management Port Figure B-4 Simplex LC Cable ConnectorFigure B-7 10/100 Port Pinouts Console PortStackWise Cables Cable and Adapter SpecificationsSFP and SFP+ Module Cable Specifications Two Twisted-Pair Cable Pinouts Four Twisted-Pair Cable PinoutsIdentifying a Crossover Cable Switch Console RJ-45-to-DB-9 Port DTEConsole Port Adapter Pinouts DeviceGND Switch Console RJ-45-to-DB-25 Port DTE OL-26779-02 Accessing the CLI Through Express Setup Configuring the Switch with the CLI-Based Setup ProgramAccessing the CLI USB Console Port Accessing the CLI Through a Console Port344194 Uninstalling the Cisco Microsoft Windows USB Driver Installing the Cisco Microsoft Windows USB Device DriverConfiguring the Setup Program Entering the Initial Configuration InformationIP Settings Enter an enable password, and press Return These choices appear OL-26779-02

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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