Cisco SM-2GE-SFP-CU
2 port GE SFP service module
Product Highlights
As branch offices and enterprise edge sites grow, so does the demand for additional Gigabit Ethernet uplinks on your routing platform. The Cisco SM-2GE-SFP-CU service module answers that need by adding two SFP-based Gigabit Ethernet ports to Cisco 3900 and 3900E Series Integrated Services Routers (ISR G2).
This service module plugs directly into any available SM slot on supported ISR G2 platforms — the Cisco 3925, 3945, 3925E, and 3945E — delivering both copper and optical GE connectivity through standard SFP (mini-GBIC) transceivers. Built on the same proven technology as the EHWIC-1GE-SFP-CU, the SM-2GE-SFP-CU shares identical SFP compatibility and feature support, giving network engineers a familiar and reliable expansion path.
Whether you need fiber uplinks to a campus core switch or copper connections to local LAN infrastructure, this module provides the flexibility to deploy the right media type per port. With support for up to six total SFP ports per chassis when combined with EHWIC-1GE-SFP-CU cards, the SM-2GE-SFP-CU helps maximize the connectivity potential of your Cisco ISR G2 investment without requiring a platform upgrade.
Features & Benefits
Dual-Port Gigabit Ethernet SFP Connectivity
The SM-2GE-SFP-CU provides two SFP (mini-GBIC) expansion slots, each capable of accepting copper or optical Gigabit Ethernet SFP transceivers. This dual-port design lets you add high-speed uplinks or LAN connections without consuming EHWIC slots, preserving those for other interface cards.
Copper and Fiber Media Flexibility
Each SFP slot supports both 1000Base-T copper SFPs and 1000Base-X fiber SFPs, giving you the freedom to match the media type to each link's distance and infrastructure requirements. Deploy fiber for long-haul campus backbone connections and copper for short-run server or switch links — all from a single module.
Seamless ISR G2 Integration
Designed specifically for the Cisco 3900 and 3900E ISR G2 product family, the SM-2GE-SFP-CU installs into any available service module slot. It is managed through the standard Cisco IOS CLI, so there is no additional management software or licensing required to bring the ports online.
Scalable Port Density
A single ISR G2 chassis supports up to six total SFP ports using any combination of SM-2GE-SFP-CU service modules and EHWIC-1GE-SFP-CU interface cards. This scalability lets you incrementally add Gigabit Ethernet capacity as your branch or campus network grows.
Deployment Scenarios
Branch Office WAN & LAN Expansion
Add dedicated Gigabit Ethernet uplinks at a growing branch office without replacing the router. The SM-2GE-SFP-CU provides two additional GE ports for WAN handoffs or LAN trunk connections, extending the useful life of your Cisco 3900 Series ISR.
Campus Edge Fiber Uplinks
Deploy fiber SFP transceivers in the SM-2GE-SFP-CU to connect your ISR G2 router to campus distribution or core switches over single-mode or multimode fiber. This eliminates the need for external media converters and simplifies the physical topology.
Multi-Service Convergence Platform
In environments running voice, video, and data services on a single ISR G2 router, the SM-2GE-SFP-CU frees up EHWIC slots for voice or WAN interface cards while still providing the Gigabit Ethernet ports needed for high-bandwidth data traffic.
General
Interfaces
Performance
Compatibility
Management
Application
Installation
Compatibility Notes
Supported Platforms
- Cisco 3925 ISR
- Cisco 3945 ISR
- Cisco 3925E ISR
- Cisco 3945E ISR
Installation Notes
- The SM-2GE-SFP-CU installs into any available service module (SM) slot on supported ISR G2 routers.
- Online Insertion and Removal (OIR) is not supported — the router must be powered off before installing or removing this module.
- The module is field replaceable as a complete unit only.
- Maximum of 6 SFP ports per chassis using any combination of SM-2GE-SFP-CU and EHWIC-1GE-SFP-CU modules.
- SFP compatibility is identical to the EHWIC-1GE-SFP-CU — refer to the EHWIC-1GE-SFP-CU datasheet for the full list of supported SFP transceivers.
- Verify minimum Cisco IOS software version for your specific router platform using the Cisco Software Advisor tool.
Downloads & Resources
Frequently Asked Questions
| Part Number | Product | Key Difference |
|---|---|---|
| EHWIC-1GE-SFP-CU | Cisco 1-Port GE SFP/Copper EHWIC | Single-port EHWIC form factor for ISR G2 EHWIC slots; supports 1900/2900/3900 series — choose when you need one port and want to use an EHWIC slot. |
| NIM-2GE-CU-SFP | Cisco 2-Port GE WAN NIM for ISR 4000 | Next-generation equivalent for Cisco ISR 4000 Series routers (4221, 4321, 4331, 4351, 4431) — the recommended migration path from the SM-2GE-SFP-CU. |
| SM-ES3G-16-P | Cisco EtherSwitch SM Layer 2/3 16-Port GE PoE | Provides 16 GE ports with PoE and Layer 2/3 switching in an SM slot — choose when you need a full embedded switch rather than routed SFP ports. |