Comparison of Routers: Cisco ISR vs ASR

Introduction

Cisco is a well-known player in the computer network industry. It ensures connectivity without interruption and the seamless flow of data within a network. Cisco offers numerous routers appropriate for diverse computing settings, including small and large businesses.

Cisco ISR and ASR are two of their best-selling routers. We will compare Cisco's ASR and ISR router series to assist you in making the right decision when purchasing a router.

What are Cisco ISR series routers?

Cisco ISR stands for Integrated Services Router. It is a multifunctional networking device that is designed to provide a wide range of services. Cisco ISR offers modular architecture and integrated services. Its routers provide reliable, secure branch connectivity and a robust set of features that enable cloud computing, secure networking, multimedia performance, and mobile connectivity. However, the Cisco ISR routers also have lower maximum Ethernet speeds; the higher-end router in the ISR 4000 series supports only 10G Ethernet.

Cisco ISRs are typically used in bandwidth-constrained environments. This router model is available from Cisco in several configurations, including the ISR 800 series, the ISR 1900 series, the ISR 2900 series, the ISR 3900 series, and the ISR 4000 series. These models use IOS as their operating system.

What are Cisco ASR series routers?

On the other hand, Cisco ASR series routers are engineered for high performance, delivering exceptional speed and scalability. ASR stands for Aggregation Services Routers and is used primarily for edge routing. They are ideal for high-bandwidth applications, such as streaming audio or videos and video conferencing. When you buy Cisco ASR routers, you select the most reliable router with advanced capabilities.

While all Cisco ASR series routers can handle up to 100G Ethernet, the Cisco ASR 900 Series and ASR 1000 Series are limited to edge routing.

Significant Similarities between Cisco ISR and ASR

Both Cisco ISR and ASR are well-known for their reliability, outstanding performance, and superior capabilities. They both share a common goal of providing detailed networking solutions, including routing, security, and data integration services. In terms of similarities, both Cisco ASR and ISR routers offer secure WAN connectivity. They have also both been approved to secure sensitive data when configured with the PSN Interim IPsec Profile. Additionally, both routers come from the trusted Cisco family, ensuring a high standard of quality, regular updates, and ongoing support.

Table 1. Below are the similarities between the Cisco ISR and ASR series routers.

Key Differences between Cisco ISR and ASR Routers

Although there are many similarities between Cisco Integrated Service Routers and Cisco Aggregation Service Routers, there are also several key differences that are ultimately more important when you compare Cisco ISR vs ASR routers. The primary difference is in their intended applications and performance capacities. Cisco ISR, with its modular architecture, is designed for flexibility and versatility, making it an excellent choice for a wide range of network sizes and types. It excels in handling standard workloads efficiently. 

Conversely, Cisco ASR is engineered for high performance and scalability, making it the preferred option for businesses dealing with heavy data tasks and demanding networking needs. The customizable configurations and superior efficiency of Cisco ASR, at a slightly higher initial cost, can lead to lower long-term operational expenses.

Table 2. enlists some differences between the Cisco ISR and ASR routers.

Head-to-Head Comparisons

Difference in Performance

There are noticeable variations in the performance of the Cisco ISR (Integrated Services Router) and ASR (Aggregation Services Router) that address different networking requirements. Known for its adaptability, Cisco ISR offers remarkable speed appropriate for typical workloads. It manages data integration, security, and routing tasks with efficiency. Conversely, Cisco ASR excels in handling heavy workloads and data-intensive tasks with remarkable efficiency. With its high performance capabilities, it is the best choice for people who desire network efficiency.

Table 3. Summarizes the difference in the performance of both Cisco ISR vs ASR routers.

Scalability

Table 4. Shows some scalability comparison between Cisco routers.

Security Features

High security is a top priority in today's interconnected world. The cost-effective Cisco ISR offers strong security features appropriate for most business needs. However, the Cisco ASR takes security to the next level with its advanced measures, making it the preferred choice for industries with strict security regulations.

Table 5. Compares the security features between Cisco ISR and ASR series routers.

Cost Considerations

When it comes to costs, Cisco ISR is a cost-effective choice for users on a tight budget. However, it's crucial to consider the long-term costs, which include maintenance and upgrades. The Cisco ASR is costly, in contrast to the Cisco ISR, because of their long run for larger enterprises with intensive networking needs.

New v/s Refurbished

When considering  to buy a new or refurbished Cisco ISR or ASR router, some factors come into play. New routers come with the advantage of being fully covered by the manufacturer's warranty and offering the newest technological advancements, despite typically costing more. However, on the other hand, selecting a refurbished Cisco router can provide cost savings, although it comes with compromises in terms of a limited warranty and potential variations in performance based on the quality of the refurbishment. 

While brand new routers ensure excellent performance and ongoing support, refurbished options can be a viable solution for those looking for a balance between affordable and satisfactory performance.

Table 6. Compares the new vs refurbished Cisco ISR and ASR series routers.

Tips for Making the Right Decision

Consulting with IT Professionals: Stressing the value of consulting IT professionals before making a choice.

Evaluating Present and Future Requirements: Advice on assessing present and future network requirements to make sure the router selected is in line with long-term objectives.

Thinking About Technological Advancements: Stressing the Need to Think About Upcoming Technological Developments and Trends in Networking.

Use Case Studies

Real-World Examples with Cisco ISR

Sharing success stories of businesses that have benefited from using Cisco ISR in their network infrastructure.

Success Stories with Cisco ASR

Highlighting the positive outcomes and improved performance observed by businesses utilizing Cisco ASR.

Where to buy?

Want to buy this series of products? please contact:

• Tel: +1 (281) 747-5957 (USA)/ (+44) 800 3688 330 (UK)/ +971 4 323 8318 (UAE)
• Email: [email protected] (Sales Inquiries) Or visit: Cisco Catalyst 9300 Series Switches

About Us

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Final Thoughts

In conclusion, choosing between Cisco ISR and ASR involves weighing various factors. By considering performance, scalability, and cost, businesses can make informed decisions that align with their specific needs. If your business is small to medium-sized, the ISR router series is the better choice. For large enterprise networks with edge routing or high bandwidth capabilities, the ASR series is the right selection.

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Frequently Asked Questions

Q: Can I use Cisco ISR for a small business network?

A: Yes, Cisco ISR is suitable for small businesses, offering versatility and reliable performance.

Q: Is purchasing a refurbished Cisco router a safe option?

A: Yes, as long as you buy from reputable sources, refurbished Cisco routers can be a cost-effective and reliable choice.

Q: What factors should I prioritize when choosing between ISR and ASR?

A: Consider your network's size, performance needs, and budget constraints to make an informed decision.

Q: Are there any known issues with Cisco ISR handling heavy workloads?

A: Cisco ISR performs well under standard workloads, but for heavy data tasks, ASR might be a more suitable option.

Q: How frequently should I assess my network needs for a potential router upgrade?

A: It's advisable to assess your network needs annually and whenever there is a significant change in your business structure or operations.