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Cisco • SKU ISR4321/K9
Cisco ISR4321/K9 — ISR 4321 Integrated Services Router
Cisco ISR 4321 Integrated Services Router (ISR4300 Series) — fixed branch router with 2x onboard GE WAN/LAN ports (2 RJ-45 + 2 SFP shared/combo), 2 NIM slots, 1U rack-mount, IP Base (IPB) license, 4GB DRAM / 4GB flash, 50 Mbps default throughput (upgradable to 100 Mbps via PERF license).
- End-of-sale — refurbished only
Download Cisco datasheet ↗ via Cisco 4000 Family Integrated Services Router Data Sheet
What is the Cisco ISR4321/K9?
Cisco ISR 4321 Integrated Services Router (ISR4300 Series) — fixed branch router with 2x onboard GE WAN/LAN ports (2 RJ-45 + 2 SFP shared/combo), 2 NIM slots, 1U rack-mount, IP Base (IPB) license, 4GB DRAM / 4GB flash, 50 Mbps default throughput (upgradable to 100 Mbps via PERF license).
TFI supplies the ISR4321/K9 refurbished to South African businesses, each unit covered by warranty and optional SLA. As a B-BBEE Level 2 distributor we can quote stock, lead time and price — usually within the same business day.
Specifications
| ports | 2x onboard GE (2x RJ-45 10/100/1000 + 2x SFP, combo/shared) |
|---|---|
| uplinks | 2 NIM (Network Interface Module) slots + 1 ISC slot for service modules |
| throughput | 50 Mbps aggregate default; upgradable to 100 Mbps via FL-4320-PERF-K9 performance license |
| memory | 4 GB DDR3 DRAM (expandable to 8 GB) / 4 GB flash |
| license | IP Base (IPB), strong crypto (K9) |
| form factor | 1U rack-mountable; 1.75 x 14.55 x 11.60 in (H x W x D) |
| power supply | Internal AC PSU, 100-240 VAC autoranging; ~125 W max (AC), up to 260 W with PoE PSU option |
| eol status | End-of-Sale; last order date 7 Nov 2023; migration to Catalyst C8200-1N-4T |
End-of-life status
The ISR4321/K9 is end-of-sale
Cisco has declared the ISR4321/K9 end-of-sale, so it is no longer manufactured new. TFI supplies it professionally refurbished and tested.
Why refurbished still makes sense: a refurbished ISR4321/K9 delivers the same proven performance at a fraction of the new-equipment cost, backed by a TFI warranty and SLA. It is the practical choice for spares, expansion of an existing deployment, or extending the life of a network you are not ready to replace. Talk to us about a successor model if you are planning a refresh.
Frequently asked questions
- What is the Cisco ISR4321/K9?
- Cisco ISR 4321 Integrated Services Router (ISR4300 Series) — fixed branch router with 2x onboard GE WAN/LAN ports (2 RJ-45 + 2 SFP shared/combo), 2 NIM slots, 1U rack-mount, IP Base (IPB) license, 4GB DRAM / 4GB flash, 50 Mbps default throughput (upgradable to 100 Mbps via PERF license).
- Is the ISR4321/K9 still supported?
- The Cisco ISR4321/K9 has reached end-of-sale, so it is supplied refurbished. TFI back every refurbished unit with a warranty and SLA options, which makes it a cost-effective choice where the platform still fits your network.
- How many ports does the ISR4321/K9 have?
- Port configuration: 2x onboard GE (2x RJ-45 10/100/1000 + 2x SFP, combo/shared); uplinks: 2 NIM (Network Interface Module) slots + 1 ISC slot for service modules.
- Can TFI deliver the ISR4321/K9 in South Africa?
- Yes. TFI is a South African distributor (B-BBEE Level 2) and ships the Cisco ISR4321/K9 nationwide. Send us the SKU and we come back with stock, lead time and price — usually the same business day.
Also in the Cisco ISR4300 Series Routers
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ACS-4320-BEZEL
Cisco ISR 4320 Series Front Bezel — decorative/protective front panel accessory for ISR 4321 and ISR 4331 routers, 1U rack-mount form factor
-
ACS-4320-FanASSY
Cisco ISR 4330 Fan Assembly, Spare — FRU hot-swap fan tray for the ISR 4330 (ISR 4300 series) integrated services router, front-to-back (FD) airflow
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ACS-4320-RM-19
Cisco ACS-4320-RM-19 — 19-inch rack mount kit for Cisco ISR 4320 Series routers; physical accessory, not a module or license
-
ACS-4330-FanASSY
Cisco ISR 4330 Fan Assembly Spare — replacement cooling fan tray for Cisco ISR 4331 Integrated Services Router, field-replaceable unit (FRU)
-
ACS-4330-RM-19
Cisco 19-inch Rackmount Kit for ISR 4330/4430 Series Integrated Services Routers — 2-bracket mounting accessory, standard EIA 19-inch rack form factor
Verification sources (7)
- https://www.renewtech.com/cisco-isr4321-k9.html
- https://www.router-switch.com/isr4321-k9-datasheet-pdf.html
- https://www.cisco.com/c/en/us/products/collateral/routers/4000-series-integrated-services-routers-isr/select-isr4k-series-platform-eol.html
- https://www.provantage.com/cisco-systems-isr4321-k9~7CSC9UYP.htm
- https://www.cablesandkits.com/equipment/routers/cisco-4000-series/isr4321-k9/pro-18376/
- https://networkdevicesinc.com/products/isr4321-k9
- https://www.cisco.com/c/en/us/products/collateral/routers/4000-series-integrated-services-routers-isr/data_sheet-c78-732542.html
Need pricing on ISR4321/K9?
Send us the SKU. We come back with stock, lead time and price — typically within the same business day.