Cisco 4000 Series Integrated Services Routers
| Overview | Product Overview |
|---|---|
| Product Type | Branch Routers |
| Status |
End of Sale
EOL Details
|
| Series Release Date | 16-SEP-2014 |
| End-of-Sale Date | 20-JAN-2025 |
| End-of-Support Date | 31-JAN-2030 |
| Diagram | Visio Stencil (5 MB .zip file) |
|
This product is supported by Cisco, but is no longer being sold.
|
|
- US/Canada 800-553-2447
- Worldwide Support Phone Numbers
- All Tools
Feedback
Feedback-
- 4221 Integrated Services Router
Status: End of Sale | End-of-Support Date: 30-Nov-2028
- 4321 Integrated Services Router
Status: End of Sale | End-of-Support Date: 30-Nov-2028
- 4331 Integrated Services Router
Status: End of Sale | End-of-Support Date: 30-Nov-2028
- 4351 Integrated Services Router
Status: End of Sale | End-of-Support Date: 30-Nov-2028
- 4431 Integrated Services Router
Status: End of Sale | End-of-Support Date: 30-Nov-2028
- 4451-X Integrated Services Router
Status: End of Sale | End-of-Support Date: 30-Nov-2028
- 4461 Integrated Services Router
Status: End of Sale | End-of-Support Date: 31-Jan-2030
-
New
Top Search Results
Key Information
Customers Also Viewed
Saved Content
-
You can now save documents for easier access and future use. Saved documents for this product will be listed here, or visit the My Saved Content page to view and manage all saved content from across Cisco.com.
Log in to see your Saved Content.
Recent Security Notices
- 07-May-2025
- 20-Dec-2024
- 25-Sep-2024
- 22-May-2024
- 15-May-2024
Document Categories
-
Data Sheets and Product Information
- Cisco 4000 Family Integrated Services Router Data Sheet
- Cisco SM-X Based Layer 2 Switching Module Data Sheet
- Cisco Packet Voice Digital Signal Processor Modules (PVDMs) for Cisco Unified Communications Solutions
- Cisco 4000 Series Integrated Services Router Gigabit Ethernet WAN Modules Data Sheet
- Cisco Multimode G.SHDSL Network Interface Module Data Sheet
- Asynchronous Terminal Server Interface Modules for Cisco 4000 Series Integrated Services Routers Data Sheet
- High-Density Analog Voice and Fax Service Modules for Cisco 4000 Series ISRs Data Sheet
- Cisco 4-Port, 8-Port, and 8-Port with PoE/PoE+ Gigabit Ethernet LAN Switch Network Interface Modules Data Sheet
- Cisco 2- and 4-Port ISDN BRI S/T Network Interface Modules Data Sheet
- Analog Voice Network Interface Modules for Cisco 4000 Series ISRs Data Sheet
- Cisco 4G LTE 2.5 Network Interface Modules Wireless WAN Interface Cards for Asia, Australia, and Selected Latin America Regions
- Cisco LTE Advanced 3.0 Network Interface Modules Wireless WAN Interface Cards
- Cisco 4G LTE 2.0 Network Interface Modules
- Cisco Snort IPS for 4000 Series Integrated Services Routers Data Sheet
- Cisco Multimode VDSL2 and ADSL2/2+ Network Interface Module Data Sheet
Data Sheets
- End-of-Sale and End-of-Life Announcement for the Cisco IOS XE 17.9.x
- End-of-Sale and End-of-Life Announcement for the Cisco ISR4461 Series Platform
- End-of-Sale and End-of-Life Announcement for the Cisco IOS XE 17.16.x
- End-of-Sale and End-of-Life Announcement for the Cisco ISR4200, ISR4300 and select ISR4400 Series Platform
- End-of-Sale and End-of-Life Announcement for the Cisco IOS XE 17.12.x
- End-of-Sale and End-of-Life Announcement for the Cisco IOS XE 17.14.x
- End-of-Sale and End-of-Life Announcement for the Cisco CAT 6 Network Interface Modules (NIMs)
- End-of-Sale and End-of-Life Announcement for the Cisco 4G DRAM (1 x 4G) for Cisco ISR 4300 Series Routers
- End-of-Sale and End-of-Life Announcement for the Cisco IOS XE 17.13.x
- End-of-Sale and End-of-Life Announcement for the Cisco ISR4200, ISR4300 and select ISR4400 Series Platform Spares
- End-of-Sale and End-of-Life Announcement for the Cisco ISR4200 and ISR4300 Series Platform for Brazil
- End-of-Sale and End-of-Life Announcement for the Cisco IOS XE 17.11.x
- End-of-Sale and End-of-Life Announcement for the Cisco IOS XE 17.10.x
- End-of-Sale and End-of-Life Announcement for the Cisco IOS XE 17.6.x
- End-of-Sale and End-of-Life Announcement for the Cisco IOS XE 17.8.x
End-of-Life and End-of-Sale Notices
-
Security Notices
-
Applicable to Multiple Models
- Field Notice: FN64253 - ISR4331, ISR4321, ISR4351 and UCS-E120 Might Fail After 18 Months or Longer Due to Clock Signal Component Failure - Replace on Failure
- Field Notice: FN74146 - Limited Number of Cisco Catalyst Routers Can Experience Memory Failures - Hardware Upgrade Available
- Field Notice: FN72510 - Cisco IOS XE Software: Weak Cryptographic Algorithms Are Not Allowed by Default for IPsec Configuration in Certain Cisco IOS XE Software Releases - Configuration Change Recommended
- Field Notice: FN72323 - Cisco IOS XE Software: QuoVadis Root CA 2 Decommission Might Affect Smart Licensing, Smart Call Home, and Other Functionality - Software Upgrade Recommended
- Field Notice: FN72578 - Cisco IOS XE - Smart Licensing Using Policy Might Cause High CPU/Memory Usage - Software Upgrade Recommended
- Field Notice: FN - 72265 - Expired PKI Certificate on vEdge, ISR, and ASR Routers Causes SD-WAN Umbrella DNS Connections to Fail - Software Upgrade Recommended
- Field Notice: FN - 64153 - ASR1000 - Inaccurate Power Supply Unit Status - Software Upgrade Recommended
- Field Notice: FN - 63938 - ISR4451X/K9 & ISR4431/K9 - Silent "PowerON" Reload - CPLD Update Required - Software Upgrade Recommended
- Field Notice: FN - 64190 - Cisco IOS XE - Show commands on Cisco IOS XE based platforms might not report true platform memory usage - Software Upgrade Recommended
-
Cisco 4431 Integrated Services Router
-
Cisco 4331 Integrated Services Router
-
Cisco 4321 Integrated Services Router
- Field Notice: FN - 70335 - ISR-WAAS-200 Deployed on an ISR-4321 Router with Cisco IOS XE Release 16.7 or Earlier Might Experience High Memory Utilization - Software Upgrade Recommended
- Field Notice: FN - 70288 - ISR-WAAS Does Not Deploy Successfully on an ISR-4321 Router Installed with Cisco IOS XE Software Release 16.9.x - Software Upgrade Recommended
- Field Notice: FN - 64321 - Network Interface Module Functionality Issue with Cisco IOS Releases Earlier than IOS-XE 16.5 - Software Upgrade Recommended
Field Notices
- Cisco Unified Threat Defense Snort Intrusion Prevention System Engine for Cisco IOS XE Software Security Policy Bypass and Denial of Service Vulnerability
- Multiple Cisco Products Snort 3 HTTP Intrusion Prevention System Rule Bypass Vulnerability
- Multiple Cisco Products Snort FTP Inspection Bypass Vulnerability
- Multiple Cisco Products Snort Application Detection Engine Policy Bypass Vulnerability
- Multiple Cisco Products Snort Modbus Denial of Service Vulnerability
- Multiple Cisco Products Snort Memory Leak Denial of Service Vulnerability
- Multiple Cisco Products Server Name Identification Data Exfiltration Vulnerability
- Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerabilities
- Multiple Cisco Products Snort TCP Fast Open File Policy Bypass Vulnerability
- Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerability
- Multiple Cisco Products Snort Ethernet Frame Decoder Denial of Service Vulnerability
- Multiple Cisco Products SNORT HTTP Detection Engine File Policy Bypass Vulnerability
- Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerability
- Cisco Secure Boot Hardware Tampering Vulnerability
Security Advisories, Responses and Notices
-
-
Release and Compatibility
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Dublin 17.12.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Cupertino 17.9.x
- Release Notes for Cisco 4000 Series ISRs, Release 17.18.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE 17.15.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE 17.16.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Bengaluru 17.6.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE 17.14.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE 17.13.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Amsterdam 17.3.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Dublin 17.11.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Dublin 17.10.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Bengaluru 17.5.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Amsterdam 17.2.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Cupertino 17.8.x
- Release Notes for Cisco 4000 Series ISRs, Cisco IOS XE Cupertino 17.7.x
Release Notes
-
Reference
- Cisco SD-Routing Command Reference
- Programmability Command Reference, Cisco IOS XE 17.16.x
- Programmability Command Reference, Cisco IOS XE 17.15.x
- Programmability Command Reference, Cisco IOS XE 17.13.x
- Cisco IOS Interface and Hardware Component Command Reference
- Programmability Command Reference, Cisco IOS XE Dublin 17.12.x
- Programmability Command Reference, Cisco IOS XE Dublin 17.11.x
- Programmability Command Reference, Cisco IOS XE Dublin 17.10.x
- Programmability Command Reference, Cisco IOS XE Cupertino 17.9.x
- Programmability Command Reference, Cisco IOS XE Cupertino 17.8.x
- Programmability Command Reference, Cisco IOS XE Cupertino 17.7.x
- Programmability Command Reference, Cisco IOS XE Bengaluru 17.6.x
- Programmability Command Reference, Cisco IOS XE Bengaluru 17.5.x
- Programmability Command Reference, Cisco IOS XE Bengaluru 17.4.x
- Cisco IOS Dynamic Application Policy Routing Command Reference
Command References
- Documentation Roadmap for the Cisco 4000 Series ISRs, Cisco IOS XE 3S
- Documentation Roadmap for Cisco 4000 Series ISRs, Cisco IOS XE Denali 16.x
- Documentation Roadmap for Cisco 4000 Series ISRs, Cisco IOS XE Denali 16.x
- Documentation Roadmap for the Cisco 4000 Series ISRs, Cisco IOS XE 3S
Documentation Roadmaps
-
Cisco 4451-X Integrated Services Router
- Open Source Used in Cisco ISR 4451-X (PDF - 844 KB)
- Implement Performance License for Integrated Service Router 4000
- Open Source Used in Web UI Cisco IOS XE 6.7.1 (PDF - 750 KB)
- Open Source Used in Cisco 4221 ISR (PDF - 3 MB)
- Cisco_IOS_XE_Denali_16_3_v1 (PDF - 785 KB)
- Open Source Used in Cisco IOS XE Denali Release 16.x (PDF - 780 KB)
Licensing Information
-
Cisco 4451-X Integrated Services Router
Technical References
-
Design
-
Install and Upgrade
- Upgrading Field-Programmable Hardware Devices for Cisco 4000 Series ISRs
- IP Addressing: NAT Configuration Guide, Cisco IOS XE Gibraltar 16.10.x
- Regulatory Compliance and Safety Information—Cisco Voice Gateway 400 and Voice Gateway 450 (PDF - 3 MB)
- Cisco VG450 Voice Gateway Hardware Installation Guide
- Regulatory Compliance and Safety Information—Safety Warnings for Cisco 4000 Series ISRsInformation sur la réglementation de la conformité et de sécurité—Safety Warnings for Cisco 4000 Series ISRs (PDF - 5 MB)
- Cisco VG400 Voice Gateway Hardware Installation Guide
- Installing the Cisco G.SHDSL Network Interface Module
- Regulatory Compliance and Safety Information for Cisco 4000 Series Integrated Services Routers
- Cisco Fourth-Generation LTE Advanced Network Interface Module Installation Guide
- Installing the Cisco VDSL2 and ADSL2/2+ Network Interface Modules
- Upgrading Flash Memory for Cisco 4000 Series ISRs
- Cisco Fourth-Generation LTE Network Interface Module Installation Guide
- Hardware Installation Guide for Cisco 4000 Series Integrated Services Routers
Install and Upgrade Guides
-
Configuration
- Configure Integrated Services Routers 4000 Series Digital Voice
Configuration Examples and TechNotes
- Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards
- Programmability Configuration Guide, Cisco IOS XE 17.16.x
- Segment Routing Configuration Guide, Cisco IOS XE 17 | Access and Edge Routers
- Cisco 4000 Series ISRs Software Configuration Guide, Cisco IOS XE 17
- Programmability Configuration Guide, Cisco IOS XE 17.15.x
- Security Configuration Guide for SD-Routing Devices
- Cloud Infrastructure on SD-Routing Devices
- Network Services Configuration Guide, Cisco IOS XE 17.x
- Programmability Configuration Guide, Cisco IOS XE 17.13.x
- IP Switching Cisco Express Forwarding Configuration Guide, Cisco IOS XE Gibraltar 16.10.x
- Cisco ASR 1000 Series Modular Ethernet Line Card Software Configuration Guide, Cisco IOS XE Gibraltar 17.x
- System Management Configuration Guide, Cisco IOS XE 17.x
- Programmability Configuration Guide, Cisco IOS XE Dublin 17.12.x
- Programmability Configuration Guide, Cisco IOS XE Dublin 17.11.x
- Programmability Configuration Guide, Cisco IOS XE Dublin 17.10.x
Configuration Guides
-
Maintain and Operate
-
Troubleshooting
- System Message Guide for Cisco IOS XE 17.18.x
- System Message Guide for Cisco IOS XE 17.17.x
- System Message Guide for Cisco IOS XE 17.16.x
- System Message Guide for Cisco IOS XE 17.15.x
- System Message Guide for Cisco IOS XE 17.14.x
- System Message Guide for Cisco IOS XE 17.13.x
- System Message Guide for Cisco IOS XE Dublin 17.12.x
- System Message Guide for Cisco IOS XE Dublin 17.11.x
- System Message Guide for Cisco IOS XE Dublin 17.10.x
- System Message Guide for Cisco IOS XE Cupertino 17.9.x
- System Message Guide for Cisco IOS XE Cupertino 17.8.x
- System Message Guide for Cisco IOS XE Cupertino 17.7.x
- System Message Guide for Cisco IOS XE Bengaluru 17.6.x
- System Message Guide for Access and Edge Routers, Cisco IOS XE Bengaluru 17.5.x
Error and System Messages
-
Cisco 4451-X Integrated Services Router
Troubleshooting Guides
-
Cisco 4461 Integrated Services Router
-
Cisco 4431 Integrated Services Router
- Troubleshoot 4000 Series ISR for Issues with ROMMON
- Critical Temperature Condition is Observed
- Monitor CPU Usage on ISR4300 Series
- ISR-WAAS Installation Guide on ISR 4000 Series Router
- Deploy Diagnostic Signatures on ISR, ASR, and Catalyst Network Devices
Troubleshooting TechNotes
-
Literature
- Miercom Performance Analysis: Cisco 4000 Series ISRs (PDF - 878 KB)
- Cisco 4000 Series Integrated Services Routers: Architecture for Branch-Office Agility (PDF - 971 KB)
White Papers
-
Log in to see available downloads.
-
