Cisco A9K-8T/4-B 8 Ports Expansion Module
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Cisco A9K-8T/4-B 8 Ports Expansion Module 10 Gigabit Refurbished

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Part Number#: A9K-8T/4-B
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Short Description:
A9K-8T/4-B 8 Ports ASR 9000 Series 10-Gigabit Ethernet Medium Queue Oversubscribed Line Card 8 x XFP Expansion Module | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days
Product Overview for the Cisco A9K-8T/4-B 8 Ports Expansion Module

Cisco is a renowned name in the world of networking equipment, and its ASR 9000 Series is known for its high-performance capabilities. This line card is designed to deliver exceptional network connectivity and data transmission capabilities. Before diving into the specifics of the Cisco 8 Ports A9K-8T/4-B, it's crucial to understand the ASR 9000 Series. The ASR 9000 Series is a range of routers designed for service providers, enterprises, and data centers. They are known for their high performance, scalability, and flexibility. These routers are capable of handling a vast amount of data, making them ideal for networks with heavy traffic.

Understanding the Cisco ASR 9000 Series

The Cisco ASR 9000 Series is a family of routers that is well-regarded in the networking industry for its reliability, scalability, and performance. These routers are used in a variety of applications, including service provider networks, data centers, and enterprise environments. They are known for their ability to handle high volumes of data traffic, making them a popular choice for organizations with demanding networking requirements.

The Cisco A9K-8T/4-B is one of the line cards in the ASR 9000 Series, specifically designed to deliver high-speed 10-Gigabit Ethernet connectivity. Let's take a closer look at its key features, functionalities, and benefits.

8 Ports

The A9K-8T/4-B line card is equipped with 8 ports, allowing you to connect multiple devices or networks. This port density is suitable for scenarios where a high number of connections are required, such as in large data centers or enterprise networks.

10-Gigabit Ethernet Speed

Each of the eight ports on this line card supports a 10-gigabit Ethernet, ensuring fast data transmission and low latency. This is crucial for applications that demand high bandwidth, like video streaming, cloud computing, and data center interconnectivity. The "10-Gigabit Ethernet" designation is indicative of the data transfer speed this line card is capable of handling. In today's high-bandwidth applications, having 10-gigabit Ethernet capabilities is essential for ensuring fast and efficient data transmission.

Medium Queue Oversubscribed

The term "medium queue oversubscribed" indicates that this line card offers a balance between the number of ports and the available bandwidth. While not every port can transmit at its full 10-gigabit speed simultaneously, the oversubscription ratio is designed to ensure smooth performance for typical usage scenarios. This is a cost-effective approach that works well in many practical situations.

XFP Expansion Module Support

This line card supports XFP (10-gigabit Small Form-Factor Pluggable) expansion modules. XFP modules are interchangeable and provide flexibility in adapting the line card to different types of fiber optic connections, distances, and wavelengths. This flexibility makes it a versatile solution for various networking needs. The "8 x XFP Expansion Modules" part of the name indicates that this line card supports eight XFP (10 Gigabit Small Form Factor Pluggable) expansion modules. These modules allow for flexibility in connecting various types of optical fibers and transceivers, making them adaptable to different networking scenarios.

Performance and Scalability

The performance of the Cisco A9K-8T/4-B line card is a crucial factor in evaluating its suitability for specific networking requirements. Here, we will delve into its performance capabilities, scalability, and how it can be integrated into a larger network infrastructure.

Throughput and Bandwidth

The A9K-8T/4-B is designed to deliver impressive throughput, thanks to its 10-gigabit Ethernet ports. With all eight ports operating at full capacity, it can provide up to 80 Gbps (gigabits per second) of data throughput. This level of bandwidth is ideal for data-intensive applications and scenarios where high-speed data transmission is a priority.


One of the key advantages of the ASR 9000 Series, including the A9K-8T/4-B line card, is its scalability. As your network grows, you can easily scale up your infrastructure by adding additional line cards or other components. This scalability ensures that your network can adapt to changing demands and expand without requiring a complete overhaul.

Redundancy and High Availability

Network reliability is a top priority for many organizations, and the ASR 9000 Series is known for its high availability features. Redundancy options are available to ensure uninterrupted operation, even in the event of a component failure. The line card can be configured with redundancy for mission-critical applications, minimizing downtime.

Buffering and Queuing

The A9K-8T/4-B line card features advanced buffering and queuing mechanisms. These help manage network traffic efficiently and prevent congestion. The medium queue oversubscription design strikes a balance between port count and available bandwidth, ensuring that data is prioritized and transmitted smoothly.

Use Cases and Applications

The Cisco A9K-8T/4-B line card is a versatile component that can be deployed in various networking scenarios. Below are some common use cases where this line card can shine:

Data Centers

In modern data centers, the need for high-speed, high-bandwidth connections is paramount. The A9K-8T/4-B line card excels in this environment, providing fast 10-Gigabit Ethernet connectivity for servers, storage, and network switches. Its scalability and high availability features make it a solid choice for data center operators.

Service Provider Networks

Service providers often handle massive amounts of data traffic. Whether it's delivering internet services, IPTV, or cloud services, the ASR 9000 Series routers, equipped with line cards like the A9K-8T/4-B, are well-suited to meet these demands. They offer the necessary throughput and reliability for critical infrastructure.

Enterprise Networks

Large enterprises with extensive networking needs, such as multinational corporations, can benefit from the A9K-8T/4-B line card's capacity to connect multiple locations or departments within the organization. Its scalability ensures that the network can grow in tandem with the business.

Internet Exchange Points

Internet exchange points (IXPs) are crucial for the smooth flow of Internet traffic between networks and service providers. The A9K-8T/4-B can play a role in these environments by enabling high-speed connections between different networks, helping to improve the overall performance of the internet.


Configuring and managing networking equipment can be a complex task, but Cisco provides tools and features to simplify the process. Here's an overview of the configuration and management aspects of the A9K-8T/4-B line card:

Cisco IOS XR Software

The A9K-8T/4-B line card operates on Cisco's IOS XR software, a robust and modular operating system designed for high-performance routers. This software provides a wide range of networking features, making it suitable for various applications.

Command Line Interface

Configuring the line card is typically done through the command line interface (CLI). The CLI offers a powerful way to manage and configure the equipment, allowing network administrators to fine-tune settings according to their specific requirements.

Cisco Network Convergence System Dashboard

For users who prefer a graphical user interface (GUI) for managing network equipment, Cisco's NCS Dashboard is a user-friendly option. It provides a visual representation of the network and offers a more intuitive approach to configuration and monitoring.

Network Automation and Orchestration

Cisco's ASR 9000 Series is designed to support network automation and orchestration. This means that you can integrate the line card into larger, automated network management systems, streamlining the deployment and management of network resources.

Key Advantages

When considering the Cisco A9K-8T/4-B line card for your network infrastructure, it's essential to recognize its key advantages:

High-Performance Connectivity

With its 10-gigabit Ethernet ports and medium queue oversubscription design, this line card ensures that your network can handle high-speed data transmission efficiently.

Reliability and Redundancy

The ASR 9000 Series is known for its high availability features, ensuring that your network remains operational even in the face of component failures. Reliability is a cornerstone of Cisco networking products. The Cisco A9K-8T/4-B is designed with redundancy in mind, ensuring that your network remains operational even in the face of hardware failures. This is a critical feature for businesses and service providers where network downtime can result in significant financial losses and damage to reputation.


The A9K-8T/4-B is versatile and can be deployed in various networking scenarios, from data centers to service provider networks and large enterprises.

Advanced Management Options

The line card can be configured and managed through the CLI or GUI, and it supports network automation and orchestration, making it suitable for a wide range of network administrators and engineers.

General Information about this Cisco A9K-8T/4-B
  • Manufacturer: Cisco
  • Part Number or SKU# A9K-8T/4-B
  • Product Type: Expansion Module
Technical Information of the 10 Gigabit Ethernet Expansion Module
  • Application/Usage: Data Networking
  • Expansion Slots: 8 x XFP
  • Total Number of Ports: 8

In summary, the Cisco A9K-8T/4-B 8-Port ASR 9000 Series 10-Gigabit Ethernet Line Card is a high-performance networking component designed for a variety of applications, from data centers to service provider networks. With its 10-gigabit Ethernet ports, medium queue oversubscription design, and support for XFP expansion modules, it offers the throughput and flexibility necessary for modern networking demands. While it comes with a price tag and requires careful configuration and management, its scalability and high availability features make it a valuable addition to any network infrastructure. When considering this line card, organizations should carefully evaluate their networking requirements and budget constraints to determine if it aligns with their specific needs.

The Cisco A9K-8T/4-B is a powerful and versatile networking solution that can help organizations meet the challenges of modern data transmission and connectivity demands. Its performance, scalability, and advanced management options make it a competitive choice for those seeking a high-quality line card for their network infrastructure.

Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

About Refurbished Products

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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