Cisco 1721-VPN/K9 Router

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Cisco 1721-VPN/K9 Router

Cisco 1721-VPN/K9 Router Overview



Device Type
Form Factor
Installed Modules Qty (Max)
1 (installed) / 3 (max)
Installed Devices / Modules Qty
1 3 (write)


Form factor
Connectivity technology
Data link protocol
Ethernet, Fast Ethernet
Switching protocol
Transport protocol
Routing protocol
Remote management protocol
RMON, SNMP, Telnet
Communication mode
Full-duplex, Half-duplex
Status Indicators
Power, Link activity, Collision status
IP-routing, Manageable, NAT support, VPN support, DHCP support, VLAN support, Modular design, Traffic shaping, Auto-negotiation, Firewall protection, Hardware encryption, DoS attack prevention, Full duplex capability, Auto-sensing per device, Low-latency queuing (LLQ), Weighted Fair Queuing (WFQ), Stateful Packet Inspection (SPI), Access Control List (ACL) support
Compliant Standards
IEEE 802.3, IEEE 802.1Q, IEEE 802.3u


96 MB (installed) / 128 MB (max)
Flash Memory
32 MB (installed) / 32 MB (max)
Memory / RAM
96 MB 128 MB
Memory / Flash
32 MB 32 MB Flash



Expansion / Connectivity

Expansion Slot(s) Total (Free)
2 1 Installed WIC, 1 0 Installed Memory, 1 0 Installed Expansion slot
Expansion Slots Total (Free)
2 ( 1 ) x WIC, 1 ( 0 ) x Memory, 1 ( 0 ) x Expansion slot
1 x Network - Ethernet 10Base-T/100Base-TX - RJ-45, 1 x Management - Console - RJ-45, 1 x Management - Auxiliary - RJ-45
Compatible Slots
Port(s) Total (Free) / Connector Type
1 Network Ethernet 10Base-T/100Base-TX:RJ-45, 1 Management Console:RJ-45, 1 Management Auxiliary:RJ-45


Cables (Details)
1 x Serial adapter, 1 x Serial cable
Compliant Standards
CSA, ETSI, CTR 21, EN55022, UL 1950, VCCI-II, EN 60950, EN 60555-2, AS/NZS 3260, EN 61000-4-2, EN 61000-4-4, EN 61000-4-5, FCC Part 15 B, IEC 61000-3-2, IEC 61000-4-2, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-11, EN55022 Class B, CISPR 22 Class B, CSA 22.2 No. 950, AS/NZ 3548 Class A, FCC Class B certified
Authentication Method
PAP, CHAP, RADIUS, TACACS+, X.509 certificates
Encryption Algorithm
IKE, Triple DES


Power Supply / Device
Power adapter External
Power Device
Power adapter - External
Voltage Required
AC 120/230 V
Power Consumption Operational
20 Watt

Cable(s) / Peripheral(s)

Cable(s) included
1 Serial adapter External, 1 Serial cable External

Expansion / Port(s) Required

Slot(s) Required


Modem Type

Environmental Parameters

Min operating temperature
32 °F
Max operating temperature
104 °F
Operating humidity range
10 - 85%


Express Computer Systems state-of-the-art engineering lab and certified technicians will make sure that your Cisco 1721-VPN/K9 Router is tested rigorously and in perfect working condition. To back it up, we carry a 100% Satisfaction Guarantee on all of our used and refurbished gear, in addition to one of the industries best warranties.

Shipping Policy

We stock all of our products. Items are fully tested and professionally packaged to ensure functionality on arrival.

The CISCO1721-VPN/K9 will ship the same day if the order is received with sufficient testing and packaging time.

*Alaska and Hawaii customers, please contact us for a shipping quote.

Shipping Methods

We ship via Fedex. Next Day and expedited shipping services are available. Please contact us for a quote to upgrade shipping.

We can also ship via UPS or FedEx on your account number. Other freight and carrier services are available, please contact us at to make arrangements.

Pickup & Delivery

Local customers may also arrange for pickup or delivery of items.

Net Terms

Approved Educational, Government, and Corporate customers may submit a purchase order to purchase the CISCO1721-VPN/K9.

Please contact us and we will FAX or Email you a credit application.

Finance & Leasing Options

We have solutions to help you finance your purchase. Please contact us at to learn more about our finance and leasing options.

Credit Card

To pay via credit card, please call us at (800) 327-0730


FAX your card type, card number, expiration date, name as it appears on the card, complete billing address including apartment number, zip code and phone number to us at (800) 327-0730.

Wire Transfer

International buyers must pay via Wire Transfer.

Please email us at to purchase this product with a wire transfer.


Business and Personal Checks must clear prior to shipment.