Replacement for CISCO1721-RF: Drop-In Alternatives We Stock
Looking for a replacement for the CISCO1721-RF (CISCO1721-RF - Cisco 1721 Modular Access Router 1 x 10/100Base-TX 2 x WIC, 1 x VPN Access Router)? Pro Disk Network ships Cisco drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the CISCO1721-RF
| SKU | CISCO1721-RF |
|---|---|
| Product | CISCO1721-RF - Cisco 1721 Modular Access Router 1 x 10/100Base-TX 2 x WIC, 1 x VPN Access Router |
| Stock status | In Stock |
| Detail page | View CISCO1721-RF › |
Drop-in replacements for CISCO1721-RF
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
Cisco CISCO1760-V3PN/K9 1760 Router 1 x 10/100Base-TX LAN 2 x VIC/WIC, 2 x VIC, 1 x Internal Expansion Router
SKU: CISCO1760-V3PN-K9
Price: $701.47
RV110W-A-NA-K9 - Cisco RV110W 100Mbps 5-Ports 10/100 Wireless N Router VPN Network Security/Firewall Appliance
SKU: RV110W-A-NA-K9
Price: $318.32
Cisco ISR4331/K9 ISR 3 x 10/100/1000 Ports Gigabit Ethernet Modular Router
SKU: ISR4331-K9
Price: $270.51
NM-1FE1R2W - Cisco Single Port 10/100 Token Ring 2 WIC Slots Network Module
SKU: NM-1FE1R2W
Price: $324.71
EHWIC-D-8ESG-P - Cisco 8-Port 10/100/1000 High Speed WIC Ethernet Switch
SKU: EHWIC-D-8ESG-P
Price: $1,171.38
C3251MARC-TP-RF - Cisco 3251 1 x 10Base-T/100Base-TX Mobile Access Router Card
SKU: C3251MARC-TP-RF
Price: $296.41
Cisco CVPN3000-PWR 110-220 V AC VPN 3000 Concentrator AC Power Supply Spare
SKU: CVPN3000-PWR
Price: $259.50
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.