Cisco ISR4321
The Cisco ISR4321 (ISR4321/K9) is a 1U infrastructure device from Cisco Systems. It features 3 network interfaces. The NDX catalog provides enrichment data across 8 categories including lifecycle, thermal, environmental, operational.
Last verified: May 3, 2026
Key Facts
| Manufacturer | Cisco Systems |
|---|---|
| Model | ISR4321 |
| Part Number | ISR4321/K9 |
| Type | Device Type |
| Form Factor | 1U, full-depth |
| Interfaces | 3 ports |
| Source | Community DTL |
| Enrichment | 8 categories available |
Specifications
Interfaces (3)
| Name | Type | Mgmt Only | Label |
|---|---|---|---|
| GigabitEthernet0 | 1000base-t | true | |
| GigabitEthernet0/0/0 | 1000base-x-sfp | ||
| GigabitEthernet0/0/1 | 1000base-t |
Power Ports (1)
| Name | Type | Max Draw (W) | Allocated (W) |
|---|---|---|---|
| PSU0 | iec-60320-c6 | 125 |
Console Ports (2)
| Name | Type |
|---|---|
| con 0 | rj-45 |
| usb | usb-mini-b |
Data Sources & Provenance
| Field | Type | Confidence | Source |
|---|---|---|---|
| thermal.tdp_watts | vendor datasheet | high | www.cisco.com |
| environmental.max_operating_temp_c | vendor datasheet | high | www.cisco.com |
| environmental.min_operating_temp_c | vendor datasheet | high | www.cisco.com |
| environmental.operating_humidity_min | vendor datasheet | high | www.cisco.com |
| environmental.operating_humidity_max | vendor datasheet | high | www.cisco.com |
| environmental.operating_altitude_m | vendor datasheet | high | www.cisco.com |
| lifecycle.ga_date | vendor eol bulletin | high | www.cisco.com |
| lifecycle.eol_announced | vendor eol bulletin | high | www.cisco.com |
| lifecycle.eos_date | vendor eol bulletin | high | www.cisco.com |
| lifecycle.eosw_date | vendor eol bulletin | high | www.cisco.com |
| lifecycle.eosec_date | vendor eol bulletin | high | www.cisco.com |
| lifecycle.last_support_date | vendor eol bulletin | high | www.cisco.com |
| thermal.cooling_type | heuristic | low | ndx-pipeline-classification |
| operational.typical_power_draw_watts | vendor datasheet | high | www.cisco.com |
| operational.max_power_draw_watts | vendor datasheet | high | www.cisco.com |
| operational.noise_level_dba | vendor datasheet | high | www.cisco.com |
| platform.nos | vendor datasheet | high | www.cisco.com |
| platform.api_types | heuristic | medium | derived from extension blocks and cli_protocol |
| snmp.vendor_oid_prefix | third party | high | www.iana.org |
| snmp.mibs | vendor documentation | medium-high | cisco-snmp-reference |
Showing 20 of 22 provenance entries.
Frequently Asked Questions
What is the Cisco ISR4321?
The Cisco ISR4321 (ISR4321/K9) is a 1U infrastructure device from Cisco Systems. It features 3 network interfaces. The NDX catalog provides enrichment data across 8 categories including lifecycle, thermal, environmental, operational.
What is the form factor of the Cisco ISR4321?
The Cisco ISR4321 is a 1U full-depth device.
How many ports does the Cisco ISR4321 have?
The Cisco ISR4321 has 3 network interfaces: 2x 1000base-t, 1x 1000base-x-sfp.
What are the power requirements for the Cisco ISR4321?
The Cisco ISR4321 has 1 power port (iec-60320-c6). Maximum power draw is 125W.
Is the Cisco ISR4321 still supported?
Lifecycle data is available for the Cisco ISR4321 in the NDX catalog. Access full lifecycle dates including general availability, end-of-sale, and end-of-support through NetBox Cloud or Enterprise.
What operational data is available for the Cisco ISR4321?
The NDX catalog includes enrichment data for the Cisco ISR4321 in the following categories: lifecycle, thermal, environmental, operational, platform, snmp, gnmi, netconf. Full enrichment values are available through NetBox Cloud or Enterprise.
How do I add the Cisco ISR4321 to NetBox?
You can import the Cisco ISR4321 directly into NetBox via the NDX features available in NetBox Cloud and NetBox Enterprise. NetBox Community users may download the YAML type definition and import it manually.
Where does the Cisco ISR4321 data come from?
The Cisco ISR4321 device type definition originates from the NetBox Community Device Type Library and has been enriched with operational metadata by NetBox Labs.
Related Devices from Cisco Systems
Last verified May 3, 2026.
Enrichment Availability
| Category | Available |
|---|---|
| Lifecycle | |
| Thermal | |
| Environmental | |
| Operational | |
| Platform | |
| SNMP | |
| gNMI | |
| NETCONF | |
| Redfish | |
| Modbus | |
| Imagery |
Access full enrichment data with NetBox Cloud or Enterprise.