Cisco C3850-NM-4-1G 4 Ports Expansion Module
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C3850-NM-4-1G Cisco Catalyst 3850 4X1GE 4 Ports Network Refurbished

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Part Number#: C3850-NM-4-1G
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Short Description:
C3850-NM-4-1G Catalyst 3850 Switches 1 Gigabits Per Second (GBPS) 4X1GE 4 Ports Small Form-Factor Pluggable (SFP) (mini-GBIC) 4 x Expansion Slots Gigabit Ethernet Expansion Module | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

High Availability and Redundancy

High availability and redundancy are critical aspects of network design that ensure uninterrupted access to network resources, minimize downtime, and improve overall network performance. The Cisco Catalyst 3850 4X1GE Expansion Module (C3850-NM-4-1G) is a hardware component that can contribute to achieving high availability and redundancy in a network.

The C3850-NM-4-1G expansion module provides additional 1 Gigabit Ethernet ports to the Cisco Catalyst 3850 Series switches. With the expansion module installed, the switch can have up to 48 1GE ports or up to 24 10GE ports, depending on the switch model. The additional ports allow for increased connectivity and can improve network availability by providing additional pathways for network traffic.

To achieve high availability and redundancy with the C3850-NM-4-1G expansion module, network administrators can configure the switch in several ways. One approach is to configure the switch in a stacked configuration, where multiple switches are combined to create a single logical switch. In this configuration, the C3850-NM-4-1G expansion module can provide additional ports for connectivity between switches, allowing for improved redundancy and failover.

Another approach is to configure the switch with redundant power supplies and network uplink connections. The C3850-NM-4-1G expansion module can provide additional network ports for redundant uplinks, allowing for improved network resiliency in the event of a failure. Additionally, the switch can be configured with redundant power supplies, ensuring that power is always available to the switch and its expansion modules.

QoS (Quality of Service) Configuration of Network Module

The Cisco Catalyst 3850 series switches support Quality of Service (QoS) functionality to prioritize network traffic and ensure that important applications receive the necessary bandwidth and network resources. The C3850-NM-4-1G is a 4-port 1 Gigabit Ethernet expansion module that can be used with the Catalyst 3850 switches to provide additional network connectivity options.
To configure QoS with the C3850-NM-4-1G module, follow these steps:
  • Identify the traffic classes: Before configuring QoS, you need to identify the different types of traffic on your network and classify them into traffic classes. For example, you may want to prioritize voice traffic over data traffic.
  • Define QoS policies: Once you have identified the traffic classes, you can define QoS policies to apply different levels of service to each traffic class. You can use the Cisco Modular QoS CLI (MQC) to define policies, which can include traffic classification, policing, marking, and shaping.
  • Apply QoS policies to interfaces: After you have defined QoS policies, you need to apply them to the appropriate interfaces on the switch. You can apply QoS policies to physical interfaces, subinterfaces, and VLANs.

Cloud Connectivity and Hybrid Cloud Deployments

Cloud connectivity refers to the ability of an organization to access and use cloud computing services over the internet. Cloud computing has become increasingly popular in recent years because it allows organizations to easily access and use IT resources without having to invest in and maintain their own infrastructure.

There are different types of cloud services, including software as a service (SaaS), platform as a service (PaaS), and infrastructure as a service (IaaS). SaaS allows organizations to use software applications hosted by a third-party provider, PaaS provides a platform for building and deploying applications, and IaaS provides virtualized computing resources such as servers, storage, and networking.

To access cloud services, organizations need to establish a reliable and secure internet connection. This can be achieved through various means such as dedicated leased lines, virtual private networks (VPNs), and the public internet.

Hybrid cloud deployments, on the other hand, involve the use of both public and private cloud resources. Organizations use a hybrid cloud approach to leverage the benefits of both cloud types while addressing the unique requirements of their specific workloads.

The Cisco Catalyst 3850 4x1GE Expansion Module (C3850-NM-4-1G) is a network expansion module that adds four 1 Gigabit Ethernet ports to the Cisco Catalyst 3850 switch. This module can be used to increase the network connectivity of the switch and support additional workloads.

In a cloud environment, the C3850-NM-4-1G expansion module can be used to connect the Cisco Catalyst 3850 switch to cloud service providers' networks, such as Amazon Web Services (AWS) or Microsoft Azure. This can help organizations establish a reliable and high-speed connection to cloud resources.

In a hybrid cloud deployment, the C3850-NM-4-1G expansion module can be used to connect the private cloud infrastructure to the public cloud resources. This allows organizations to seamlessly move workloads between the two environments and take advantage of the benefits of both. For example, an organization may use a private cloud for sensitive data and critical applications while using public cloud resources for less critical workloads.

Main Specification about this Cisco C3850-NM-4-1G

  • Manufacturer: Cisco
  • Model Number or SKU# C3850-NM-4-1G
  • Product Series: Catalyst 3850
  • Product Type: Expansion Module

Technical Information for Network Module

  • Total Number of Ports 4
  • Port Speed: 10/100/1000
  • Port Type: SFP
  • MTBF: 7,052,100 Hours
  • Application/Usage: Data Networking
  • Application/Usage: Optical Network

I/O Expansions of Expansion Module

  • Interface Provided: 4 - SFP (mini-GBIC)
  • Compatible Slot 1 x expansion slot

Network & Communication

  • Connectivity Technology: Wired
  • Data Link Protocols: Gigabit Ethernet
  • Data Transfer Rate: 1 GBPS
  • Form Factor: Plug-in module
  • Ethernet interface type: Fast Ethernet, Gigabit Ethernet


  • Cisco Catalyst 3850-12S-E
  • Cisco Catalyst 3850-12S-S
  • Cisco Catalyst 3850-12S-X
  • Cisco Catalyst 3850-12X48U-E
  • Cisco Catalyst 3850-12X48U-S
  • Cisco Catalyst 3850-24P-BA
  • Cisco Catalyst 3850-24P-E
  • Cisco Catalyst 3850-24P-L
  • Cisco Catalyst 3850-24P-S
  • Cisco Catalyst 3850-24S-E
  • Cisco Catalyst 3850-24S-S
  • Cisco Catalyst 3850-24T-E
  • Cisco Catalyst 3850-24T-L
  • Cisco Catalyst 3850-24T-S
  • Cisco Catalyst 3850-24U-E
  • Cisco Catalyst 3850-24U-L
  • Cisco Catalyst 3850-24U-S
  • Cisco Catalyst 3850-24XU-E
  • Cisco Catalyst 3850-24XU-S
  • Cisco Catalyst 3850-48F-E
  • Cisco Catalyst 3850-48F-L
  • Cisco Catalyst 3850-48F-S
  • Cisco Catalyst 3850-48P-E
  • Cisco Catalyst 3850-48P-L
  • Cisco Catalyst 3850-48P-S
  • Cisco Catalyst 3850-48T-E
  • Cisco Catalyst 3850-48T-L
  • Cisco Catalyst 3850-48T-S
  • Cisco Catalyst 3850-48U-E
  • Cisco Catalyst 3850-48U-L
  • Cisco Catalyst 3850-48U-S

These switches are compatible with a variety of software and hardware components, including:

  • Cisco IOS XE 3.6.xE or later
  • Cisco IOS XE 3.7.xE or later
  • Cisco IOS XE 3.3.xSE or later
  • Cisco IOS XE 3.4.xSE or later
  • Cisco IOS XE 3.5.xE or later
  • Cisco IOS XE 3.6.xSE or later
  • Cisco IOS XE 3.7.xSE or later
  • Cisco Catalyst 3850 Series StackWise-480 and StackPower cables
  • Cisco Catalyst 3850 Series Network Modules
  • Cisco Catalyst 3850 Series power supplies
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

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Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.

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