Cisco ISR 4000 series (4221, 4331, 4351, 4431, 4451)
Modular branch router, NIM/SM slots, IOS-XE
The Cisco ISR 4000 series (4221, 4331, 4351, 4431, 4451) is a previous-generation model that is still supported and common in the field. It belongs to the Cisco routers and firewalls (ISR, Catalyst 8000, ASA, Firepower) family.
At a glance
| Vendor | Cisco |
|---|---|
| Family | Cisco routers and firewalls (ISR, Catalyst 8000, ASA, Firepower) |
| Ports and features | Modular branch router, NIM/SM slots, IOS-XE |
| Status | previous |
About the family
Cisco ISR 1100/4000 series and Catalyst 8200/8300 edge routers for WAN and SD-WAN, ASA 5500-X firewalls (end of life) and Firepower 1000/2100/3100 running Secure Firewall Threat Defense.
ASA 5506-X/5508-X/5516-X are end of support; we migrate them to Firepower 1010/1120 or to SonicWall/Fortinet depending on the client's preference and licensing budget.
What RackLedge does with the Cisco ISR 4000 series (4221, 4331, 4351, 4431, 4451)
- Configuration from a documented template: VLANs, trunks, spanning tree, management access, logging
- Installation, uplinks and stacking or HA pairing
- Firmware updates and configuration backups on a schedule
- Troubleshooting and RMA handling
- Lifecycle planning and licence renewals
Related models
Frequently asked questions
Is the Cisco ISR 4000 series (4221, 4331, 4351, 4431, 4451) still supported?
It is a previous-generation model that is still supported and common in the field.
Do you support hardware you did not sell?
Yes. We take over existing networks, document them, back up the configurations and fix what is broken.
Can you manage it remotely?
Yes, through a secure management VPN or the vendor's cloud console where one exists. Physical work is done on-site in Texas or by partner hands elsewhere.
Need a hand with this?
Tell us what you are running and what is slowing you down. You get a straight assessment and a plan, with no obligation. Support desk is staffed 24/7.