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Cisco Cisco 2921/K9Cisco 2921/K9 ISR 3x GbE 2GB Integrated Services Router Enterprise

Excellent Grade · Fully tested · No visible marks
SKU: 71143
4.76
★★★★★
708 reviews
12mo
Warranty
30day
Free returns
40+
Tech-tested checks
✓ Fast AU shipping ✓ Pickup: Springvale VIC
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$49.00 $79.00

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Customize and Upgrade Your Device

  • Refurbished - 1yr Warranty - Reboot IT

    1yr Warranty

    $50.00 $75.00

Perks you get with every purchase

Warranty
If your item experiences a technical issue, we've got you covered—we'll either repair it or replace it for you!

30 days to change your mind
Feel free to return your item for any reason within the first 30 days of receiving it. It's that easy!

Free express shipping
Enjoy fast, free express shipping on all small items like laptops, tablets, and smartphones!

Customer support
Rest assured, we’ll always respond to you within 1 business day!

Frequently asked questions

What does the warranty cover?

Our warranty covers all hardware faults, but please note it doesn’t cover accidental damage or software issues. However, we’re here to help with technical support for those matters!

What is a refurbished device?

A refurbished device is a pre-owned item that has been restored to meet high-quality standards. At Reboot IT, we adhere to strict quality guidelines, ensuring that our refurbished products are not the same as used or secondhand items. We meticulously clean, test, and assess each device, replacing worn parts with high-quality components.

Unlike used items, which lack guarantees and rely solely on the seller's word regarding condition, refurbished devices come with assurance of quality and reliability.

What payment options are available?

We offer a variety of payment options to make your shopping experience as convenient as possible! You can pay using all major credit cards, Apple Pay, Google Pay, Shop Pay, Afterpay, Zip Pay, and PayPal. If you prefer, we also accept bank deposits and even cash for in-store purchases!

At a Glance

Memory
2GB
Connectivity
Ethernet Port
Operating System
iOS

Safe & Secure

  • American Express
  • Apple Pay
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa

We ensure secure processing of your payment information and do not retain or have access to your credit card details.

Description

Cisco 2921/K9 — ISR G2 Enterprise Router

The Cisco 2921/K9 is a second-generation Integrated Services Router with 3 built-in Gigabit Ethernet ports, 4 EHWIC expansion slots, 256 MB Flash, and 512 MB DRAM. Backed by a 12-month warranty from Reboot IT, it is well suited to medium branch offices and campus edge deployments running Cisco IOS.

Key Benefits

  • 3x Gigabit Ethernet Ports: Multi-WAN capable GbE interfaces for redundant WAN links or load balancing configurations
  • 4 EHWIC Expansion Slots: Modular expansion with voice, DSL, 4G, serial, and additional GbE interface cards
  • Cisco IOS 15.x: Full enterprise routing — OSPF, EIGRP, BGP, QoS, IPSec VPN, DMVPN, and zone-based firewall
  • 256 MB Flash / 512 MB DRAM: Sufficient headroom for IOS 15.x images, configuration, and routing tables
  • 1 ISM Slot: Internal Service Module slot for Cisco UC applications and voice DSP cards
  • 12-Month Warranty: Tested, verified, and reset to factory defaults by Reboot IT's Melbourne team

Performance in Use

The Cisco 2921/K9 sits at the mid-point of the ISR G2 family, offering more processing capacity and expansion slots than the 2911 while remaining deployable at branch level without specialised rack infrastructure. Its four EHWIC slots allow the platform to be customised for voice DSP, additional WAN links, or serial connectivity — making it a flexible foundation for branch requirements that evolve over time.

At the campus edge or medium branch level, the 2921 handles simultaneous routing, VPN termination, QoS enforcement, and basic firewall functions. With IOS 15.x, features such as DMVPN, zone-based firewall, and Cisco Application Visibility and Control (AVC) are available for networks that require more sophisticated policy enforcement.

Technical Specifications

Specification Detail
Model Cisco 2921/K9 (ISR G2)
Built-in GbE Ports 3x Gigabit Ethernet
EHWIC Slots 4
ISM Slots 1
Flash Memory 256 MB
DRAM 512 MB (upgradeable to 2 GB)
Operating System Cisco IOS 15.x
Routing Protocols OSPF, EIGRP, BGP, IS-IS, RIP
VPN Support IPSec, SSL VPN, DMVPN, GET VPN
Form Factor 2U rack-mount
Warranty 12-month (Reboot IT)

Is It Right for You?

Best For ✓ Not For ✗
Medium branch and campus edge deployments Home or SOHO use cases
Multi-WAN or redundant WAN configurations High-throughput data centre core routing
EHWIC module expandability (voice, DSL, 4G, serial) Environments needing more than 4 EHWIC slots
Cisco IOS managed enterprise networks SD-WAN-only architectures not requiring IOS
VPN headend or spoke deployments Buyers needing newer IOS XE platforms (ISR 4xxx)

Condition Grades

Grade Description
A — Excellent Minimal cosmetic marks. All ports functional. Tested and reset to factory defaults. All LEDs verified.
B — Good Light wear or minor marks. All ports functional. Tested and reset to factory defaults.

Frequently Asked Questions

What EHWIC modules are compatible with the 2921?

The 2921 accepts all standard Cisco EHWIC modules including cards for 4G LTE, ADSL/VDSL, additional GbE ports, serial T1/E1 interfaces, and voice DSPs. Check Cisco's compatibility matrix for your specific card.

What IOS version does it ship with?

Units ship with Cisco IOS 15.x installed and reset to factory defaults. The specific release varies by unit — contact us for details.

How much RAM does it have?

Standard configuration is 512 MB DRAM and 256 MB Flash. Some units may have been upgraded to 2 GB DRAM — contact us to confirm for your unit.

Does it support VPN?

Yes. The K9 designation means the security bundle is included, enabling hardware-accelerated IPSec, DMVPN, GET VPN, and SSL VPN without a performance penalty.

Does it need a rack?

The 2921 is a 2U rack-mount device. Rack rails may or may not be included — check the listing or contact us to confirm availability.

How is shipping handled?

Shipping costs apply based on size and destination — rates are calculated at checkout.

What does the 12-month warranty cover?

All hardware defects and functional failures. Units are tested and reset to factory defaults before dispatch.

12-Month Warranty — Reboot IT

Every Cisco 2921/K9 sold by Reboot IT is backed by a 12-month return-to-base warranty. Our team has been testing, grading, and reselling quality IT equipment since 2001 from our Melbourne base. Shipping costs apply based on size and destination — rates are calculated at checkout. Questions? Visit us at reboot-it.com.au.

Specifications
  • Model
    Cisco 2921/K9
  • RAM
    2GB
  • Display Type
    IPS LCD
  • Operating System
    iOS
  • Connectivity
    Ethernet Port
  • Colour
    Black
  • Warranty
    1 Year

What's in the box
  • Cisco - Cisco 2921/K9
  • Tax invoice
By buying refurbished, you avoid
250kg

of CO₂ vs. manufacturing new

And divert
4.5kg

of e-waste from landfill

Source: Cisco Catalyst PAIA lifecycle — per unit.

Why the Cisco 2921/K9?

The Cisco 2921/K9 ISR G2 router delivers enterprise-grade networking with 3x Gigabit Ethernet ports, 4 EHWIC expansion slots, and 2GB RAM for flexible medium branch office deployments.

Cisco 2921 Integrated Services Router | 3mth Wty

Triple Gigabit Connectivity

Three built-in Gigabit Ethernet ports enable multi-WAN configurations with redundant links and load balancing capabilities.

Enterprise IOS Features

Cisco IOS 15.x provides full enterprise routing with OSPF, EIGRP, BGP, QoS, IPSec VPN, and zone-based firewall capabilities.

Modular Expansion Slots

Four EHWIC expansion slots allow customization with voice, DSL, 4G, serial, and additional Ethernet interface cards.

12-Month Warranty Included

Comprehensive 1-year warranty backed by REBOOT IT's Melbourne team with factory reset and verification testing.

Triple Gigabit Connectivity

Three built-in Gigabit Ethernet ports enable multi-WAN configurations with redundant links and load balancing capabilities.

Enterprise IOS Features

Cisco IOS 15.x provides full enterprise routing with OSPF, EIGRP, BGP, QoS, IPSec VPN, and zone-based firewall capabilities.

Cisco 2921 Integrated Services Router | 3mth Wty

Modular Expansion Slots

Four EHWIC expansion slots allow customization with voice, DSL, 4G, serial, and additional Ethernet interface cards.

12-Month Warranty Included

Comprehensive 1-year warranty backed by REBOOT IT's Melbourne team with factory reset and verification testing.

Let customers speak for us

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Fantastic service

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James Lees
All-in-one Solution for Home Office

I was looking for an in-expensive all-in-one solution for my home office to replace my existing desktop and monitor. I found this EliteOne 800 on reboot IT for under $200. I wasn't sure what to expect. It arrived within two days!!!! I upgraded the RAM, replaced the HDD and installed Windows 11. This is unbeatable value and was the cheapest price online. Coupled with a 3-month warranty, Reboot IT are by far the best online refurbished retailer I have used. Awesome!

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Melinda Panuan
Excellent

Excellent work

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steve maloney
exactly as described and works well

exactly as described and works well , just like the staff down there. 10/10

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Very happy, thank you

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Barbara Jenkins Jenkins
Just having trouble greeting it linked to the internet otherwise it’s okay

Just having trouble greeting it linked to the internet otherwise it’s okay.

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Fair tech for price

Fair tech for price, good specs for era, serves the purpose. The black keyboard is an interesting rubber like texture clearly by design to pad the screen and avoid the keyboard touching. Screen is great. Still looking for magic formula to enable computer use in the bright bright sunshine. Keyboard taps are loud for someone who likes silent touch. The perfect PC has to exist, like build a bear.

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IAN BOLSTER
Works excellently as advertised.

The laptop was sold with a warning about worn keycaps. In fact they had been obviously vandalised (ex school laptops, perhaps?). The keyboard worked fine, and the rest of the laptop too. I'm using it as a file server, so I don't need the keyboard much. So very pleased, and also pleased with reboot-it's service - as always, excellent, and quick responses to any queries.

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    We carefully source certified refurbished computers from trusted corporate, government, and education sectors, giving each device a fresh start and new purpose.

  • Secure Data Wipe

    To protect your privacy, all previous data is securely and thoroughly erased from every tested refurbished device before it reaches you.

  • Comprehensive Testing

    Each certified refurbished computer undergoes detailed testing with specialized software to ensure full functionality, and any worn or faulty components are replaced exclusively with original parts, guaranteeing reliable, long-lasting performance for your tested refurbished device.

  • Cleaning & Grading

    Every computer is professionally cleaned and carefully graded, so you know exactly what condition your certified refurbished computer is in—giving you full confidence in your purchase.

WELCOME TO REBOOT IT

Australia's number one source for Refurbished Desktops, Laptops, Monitors and more.

Since 2001, Reboot IT has been Australia’s trusted source for certified refurbished computers and IT hardware. Every device is rigorously tested and professionally refurbished to deliver reliable, like-new performance — all at a fraction of the cost of new equipment. With over 100,000 satisfied customers, we combine expert quality with unbeatable value. Shop with confidence knowing your refurbished device comes backed by warranty and supports sustainable tech reuse.

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