Cisco SM-D-ES3G-48-P Cisco Service Module

Brand: Cisco | Category: Accessories & Components

SKU: CSC-SM-D-ES3G-48-P | Part #: SM-D-ES3G-48-P | MPN: SM-D-ES3G-48-P

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The Cisco SM-D-ES3G-48-P is a 48-port gigabit Ethernet service module purpose-built for the Cisco ISR G2 2900 and 3900 Series integrated services routers. This module transforms a campus or branch router into a managed switching platform without requiring separate hardware, making it essential infrastructure for organizations that need switching capability co-located with their WAN edge routing. If your deployment calls for reducing device footprint, simplifying cabling, or enabling local switching at a router chassis, the SM-D-ES3G-48-P delivers that integration directly into the service module slot.

Network engineers and infrastructure teams select this module when they need to consolidate functions at branch offices, campus access layers, or edge locations where dedicated switch hardware would consume additional rack space or power budget. The 48 copper RJ-45 ports each support 10/100/1000BASE-T speeds, meaning you get full gigabit density without optical complexity at the module level. Every port is individually configurable for data, voice, or video traffic, and the module's IEEE 802.3af and 802.3at Power over Ethernet (PoE and PoE+) support means you can power IP phones, wireless access points, and networked cameras directly from the same interface. For enterprise branches where space is constrained and you're already deploying a Cisco ISR G2 router, adding the SM-D-ES3G-48-P eliminates the need for a separate access switch entirely.

The switching fabric operates at both Layer 2 and Layer 3, providing MAC address switching, IP routing, and VLAN intelligence from a single module. The Cisco SM-D-ES3G-48-P maintains an 8,000-entry MAC address table, sufficient for typical enterprise LANs, and supports IEEE 802.1Q VLAN tagging for network segmentation without external management overhead. Spanning Tree Protocol in its standard, rapid, and per-VLAN flavors ensures loop-free topology, critical for branch networks where redundancy exists but loops must be prevented. Quality of Service handles both IEEE 802.1p Class of Service and DSCP marking, allowing you to prioritize voice and video traffic within the same module without external QoS appliances. IGMP snooping optimizes multicast traffic efficiency, and port security combined with 802.1X authentication adds layer-by-layer access control without requiring a separate identity and access management device.

Management of the SM-D-ES3G-48-P occurs through Cisco IOS Software CLI commands executed on the host ISR G2 router, or via SNMP polling for remote monitoring and statistics. The module connects to the router via a high-speed internal service module bus, eliminating external interconnect complexity and ensuring low-latency switching decisions. This internal interface also means troubleshooting follows standard ISR G2 diagnostics—network operations teams do not learn a separate management plane. DHCP snooping prevents rogue DHCP servers from compromising host IP assignments, a critical safeguard in branch and campus environments where unauthorized devices might connect. The module operates reliably across standard data centre and office temperatures of 0°C to 40°C and carries full regulatory compliance marking (UL, CE, FCC), confirming it meets safety and electromagnetic emissions standards globally.

Organizations running Cisco ISR G2 infrastructure across multiple sites benefit from the consistency of deploying identical switching logic at each location. Rather than mixing switch vendors or managing different software versions across access layers, a standardized approach using the SM-D-ES3G-48-P simplifies operational overhead, reduces Mean Time To Resolution when issues arise, and ensures uniform policy enforcement from the branch edge back to the core. This module is not a replacement for large campus switches or data centre core infrastructure, but it is the right choice for anyone running ISR G2 routers who needs integrated switching without adding a separate box to the rack.

Switching and Connectivity Specifications

• 48 × 10/100/1000BASE-T copper ports with integrated PoE (802.3af) and PoE+ (802.3at) support
• Layer 2 and Layer 3 switching with 8,000 MAC address table entries and IEEE 802.1Q VLAN tagging
• Spanning Tree variants (STP, RSTP, PVST+) for redundancy and loop prevention in multi-switch topologies
• Quality of Service via IEEE 802.1p CoS and DSCP marking for traffic prioritization
• Security framework including port security, IEEE 802.1X authentication, DHCP snooping, and IGMP snooping
• Internal high-speed service module bus connection to ISR G2 host router; managed via Cisco IOS CLI or SNMP
• Operating range 0°C to 40°C with UL, CE, and FCC regulatory certification

Omnixon Global supplies the Cisco SM-D-ES3G-48-P and related ISR G2 infrastructure across the GCC, South Asia, and Europe. We maintain stock for immediate delivery and support integration planning for multi-site deployments. To discuss module availability, compatibility validation with your existing ISR G2 fleet, or to place a request for quotation on the SM-D-ES3G-48-P, contact our team in Dubai or submit an RFQ through our platform.