Cisco C1111-4P EOL: Replace with C1121-4P or Upgrade to Catalyst 8200?

Author: Selene Gong

Quick Take

Cisco has announced the End of Sale and End of Life for the C1111-4P and related ISR 1111 Ethernet router models. Cisco lists C1121-4P as the official migration product, while Catalyst C8200-1N-4T is a broader SD-WAN and branch-network upgrade option.

The Cisco C1111-4P is now in the ISR 1111 end-of-life process. The last date to order the affected products was July 28, 2026, while the Last Date of Support is July 31, 2031. Before choosing a replacement, confirm the exact hardware configuration, WAN and LAN requirements, PoE needs, IOS XE version, and SD-WAN deployment model. You can also review the C1111-4P product details before preparing a replacement request.

1. Cisco C1111-4P EOL Status and Key Dates

2. C1121-4P vs Catalyst C8200-1N-4T

3. When Should You Choose C1121-4P?

4. When Should You Upgrade to Catalyst C8200?

5. C1111-4P Migration Planning Checklist

6. C1111-4P EOL and Replacement FAQs

Cisco C1111-4P EOL Status and Key Dates

Cisco has announced the End of Sale and End of Life for the Cisco ISR 1111 Series Ethernet Routers. The announcement affects the standard C1111-4P and related ISR 1111 product variants.

According to the official Cisco ISR 1111 EOL announcement , the affected products can continue to receive support under active service contracts, but the procurement and software-maintenance milestones should be included in the replacement plan.

Lifecycle milestone	Date	What it means
EOL Announcement Date	July 28, 2025	Cisco formally announced the ISR 1111 Ethernet router EOL process.
End-of-Sale Date	July 28, 2026	The affected products can no longer be ordered through Cisco point-of-sale channels.
Last Ship Date	October 27, 2026	The last possible ship date that can be requested from Cisco or its contract manufacturers.
End of Software Maintenance Releases	July 28, 2027	Cisco Engineering will no longer develop or maintain regular software fixes after this date.
End of Vulnerability and Security Support	July 27, 2029	Planned software remedies for security vulnerabilities will no longer be released after this milestone.
End of Service Contract Renewal	October 26, 2030	The last listed date to extend or renew a service contract.
Last Date of Support	July 31, 2031	Applicable Cisco service and support for the affected hardware ends.

The last order date has already passed as of August 2026. If you need a spare, replacement, or final expansion, confirm the exact SKU, service status, and available procurement path before placing an order.

C1121-4P vs Catalyst C8200-1N-4T

Cisco provides two different replacement directions for a C1111-4P deployment. The C1121-4P is the official ISR 1100 migration product listed in the EOL announcement. The Catalyst C8200-1N-4T is a different platform intended for a broader branch-routing and SD-WAN upgrade.

Decision factor	C1121-4P	Catalyst C8200-1N-4T
Product family	Cisco ISR 1100 Series	Cisco Catalyst 8200 Series
Main purpose	Lower-risk ISR 1111 migration	Branch and SD-WAN architecture upgrade
WAN connectivity	Two Gigabit Ethernet WAN interfaces	Four 1GbE WAN ports
Expansion	ISR 1100 platform design	One NIM slot and one PIM slot
Management model	Existing IOS XE operational model	Catalyst SD-WAN or IOS XE
Licensing	Verify current ISR software and service licenses	Cisco DNA Software subscription required
Migration complexity	Lower	Higher
Best fit	Preserve the existing branch design	Modernize WAN, security, and centralized management

The C1121-4P replacement option is generally better suited to projects that want to preserve the existing ISR 1100 operating model. The Catalyst C8200 requires a broader review of interfaces, modules, licensing, management, and configuration migration.

When Should You Choose C1121-4P?

The C1121-4P is the preferred option when the main goal is to replace the C1111-4P with limited changes to the branch network.

C1121-4P Is a Good Fit When

The existing branch still needs two Gigabit Ethernet WAN interfaces.
Four Gigabit Ethernet LAN ports are sufficient.
The current IOS XE operational model should remain familiar.
The project should minimize routing, NAT, VPN, and security-policy changes.
The site does not require a major Catalyst SD-WAN transformation.
The organization wants to reduce migration and training complexity.

What to Confirm Before Ordering

WAN interface type and whether the combo port uses copper or SFP.
LAN port usage and current PoE or PoE+ requirements.
Current IOS XE release and software feature set.
IPsec VPN throughput and tunnel requirements.
Existing Cisco DNA, support, or service subscriptions.
Required quantity and target replacement date.

C1121-4P should not be described as a guaranteed performance upgrade in every category. Its main advantage is platform continuity and Cisco's official migration mapping from C1111-4P.

When Should You Upgrade to Catalyst C8200-1N-4T?

The Catalyst C8200-1N-4T is more appropriate when the C1111-4P replacement is part of a larger branch-network or SD-WAN modernization project.

Catalyst C8200 Is a Good Fit When

The organization plans to deploy Cisco Catalyst SD-WAN.
The branch requires more WAN interfaces or module flexibility.
The project needs a larger SD-WAN overlay tunnel scale.
The network requires higher control-plane and storage capacity.
WAN routing, security, and cloud connectivity should be centrally managed.
The replacement is part of a longer-term branch architecture plan.

Why C8200 Requires More Planning

WAN interface design may change.
NIM and PIM modules may need to be selected separately.
Cisco DNA subscription requirements must be included.
SD-WAN controller and management processes may change.
Security policies, VPNs, routing, and monitoring need validation.
Operations teams may need training on the Catalyst platform.

Cisco lists the C8200-1N-4T with four 1GbE WAN ports, one NIM slot, one PIM slot, and support for Cisco Catalyst SD-WAN. The platform is designed for a different operating model, so it should be evaluated as an architecture upgrade rather than a simple port-for-port replacement.

You can also review the C8200-1N-4T product details together with the required Cisco DNA subscription and module configuration before requesting a quotation.

Need a C1111-4P replacement review?

Send your SKU, interfaces, PoE needs, and SD-WAN plans.

Compare C1121-4P Send Your C1111-4P Details

C1111-4P Migration Planning Checklist

A successful C1111-4P replacement requires more than matching the number of Ethernet ports. Complete the following checks before approving a migration design.

1. Confirm the Exact C1111-4P Variant

Record the device label, product ID, and complete system SKU.
Confirm whether the device is the standard C1111-4P or a DNA, LTE, or wireless variant.
Document the current IOS XE release and service-contract information.
Record installed licenses and software subscriptions.

2. Map WAN, LAN, and PoE Requirements

Document active WAN interfaces and whether the combo port uses copper or SFP.
Record all active LAN ports and connected devices.
Confirm PoE and PoE+ requirements for phones, access points, or other devices.
List optics, cables, and transceivers that may need to be reused.
Check rack, shelf, power, and airflow requirements.

3. Review IOS XE, SD-WAN, and Licensing

Confirm whether the device runs in autonomous routing mode or SD-WAN mode.
Review NAT, ACL, VRF, QoS, and routing protocol requirements.
Document IPsec VPN tunnel count and throughput requirements.
Confirm Cisco DNA subscription and controller requirements for the target platform.
Check whether the target IOS XE version supports the required features.

4. Prepare Configuration Testing and Rollback

Back up the running configuration before making changes.
Export routing, NAT, VPN, and security-policy settings.
Prepare a port-by-port mapping table for the replacement router.
Test WAN failover, VPN tunnel establishment, routing, and NAT behavior.
Define a maintenance window and rollback configuration.
Monitor the site after the production cutover.

The C1121-4P may allow a more familiar migration path, while the Catalyst C8200 may require broader changes to licensing, management, modules, and SD-WAN operation. Select the platform only after reviewing the complete deployment requirements.

C1111-4P EOL and Replacement FAQs

These questions help determine whether the project requires a like-for-like replacement or a broader network upgrade.

Q1 What is the Cisco C1111-4P last order date?

Cisco lists July 28, 2026 as the End-of-Sale Date for the affected C1111-4P and ISR 1111 Ethernet router products.

Q2 When does Cisco support for the C1111-4P end?

Cisco lists July 31, 2031 as the Last Date of Support for the affected hardware, subject to applicable service-contract and warranty terms.

Q3 Is C1121-4P the official replacement for C1111-4P?

Yes. Cisco lists C1121-4P as the migration product for the standard C1111-4P in the ISR 1111 EOL announcement.

Q4 Is Catalyst C8200-1N-4T a direct replacement?

No. Catalyst C8200-1N-4T is a different platform intended for branch routing, SD-WAN, and higher-scale edge deployments. It should be evaluated as an architecture upgrade.

Q5 What information is needed for a C1111-4P replacement quote?

Prepare the exact SKU, quantity, WAN and LAN requirements, PoE needs, current IOS XE version, SD-WAN status, VPN requirements, and target migration date.

Final Takeaway

Choose C1121-4P when you need a lower-risk replacement that stays close to the existing Cisco ISR 1100 deployment. Choose Catalyst C8200-1N-4T when the project is also an SD-WAN, security, or branch-architecture upgrade.

For a configuration-specific review, you can send your exact C1111-4P details including the SKU, quantity, WAN and LAN requirements, PoE needs, IOS XE version, and SD-WAN plans.