<div>
both &nbsp;4431 as the 4331 is no longer available to buy<br />
<a href="https://www.cisco.com/c/en/us/products/collateral/routers/4221-integrated-services-router-isr/eos-eol-notice-c51-742328.html" rel="ugc">https://www.cisco.com/c/en/us/products/collateral/routers/4221-integrated-services-router-isr/eos-eol-notice-c51-742328.html</a><br />
<br />
Customers may be able to continue to purchase the Cisco Select 4300ISR and 4400ISR bundles through the Cisco Certified Refurbished Equipment program. Refurbished units may be available in limited supply for sale in certain countries on a first-come, first-served basis until the Last Date of Support has been reached. For information about the Cisco Certified Refurbished Equipment program, go to: <a href="https://www.cisco.com/go/eos" rel="ugc">https://www.cisco.com/go/eos</a>.
</div>


<div>
That eos notice is only for a very specific model. ISR4331/K9 is still available and will be more than adequate as replacement for your 2600. I would not spend the extra money for the 4431
</div>


Programmer

litmic

<div>
The EOS notice is only for the Boost Bundle series (4331-B, 4431-B) but others are still available.<br />
<br />
The 4431 has more network ports, higher throughput, and an optional redundant power connection. It's designed for a large network, while the 4331 is designed more for a medium sized network. &nbsp; To replace the 2600, I'd go with the cheaper 4331 unless you really need the extra.<br />
<br />
A quick comparison tool can be found at <a href="https://www.cisco.com/c/en/us/products/routers/router-selector.html" rel="ugc">https://www.cisco.com/c/en/us/products/routers/router-selector.html</a><br />
<br />
The direct link to comparison for these two models is <a href="https://www.cisco.com/c/en/us/products/routers/router-comparison.html?product_id=43|45" rel="ugc nofollow">https://www.cisco.com/c/en/us/products/routers/router-comparison.html?product_id=43|45</a>&nbsp;and has an option to download the comparison for an easier view.
</div>


<div>
<div class="content wysiwyg-content">
Want to replace outdated mode cisco router 2611 XM with either Cisco isr 4331 or cisco isr 4431. What's the difference of these 2 models? Which model should I select?
</div>
</div>


Want to replace outdated mode cisco router 2611 XM with either Cisco isr 4331 or cisco isr 4431. What's the difference of these 2 models? Which model should I select?

Cisco isr 4331 or 4431?

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).

Cisco

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.