UCSC-MLOM-IRJ45 Cisco UCS Series 4x 1GB RJ-45 Server Module.

Cisco UCSC-MLOM-IRJ45 4-Port Ethernet Adapter Overview

Enterprise-Class MLOM Network Connectivity for Cisco UCS Servers

The Cisco UCSC-MLOM-IRJ45 Intel I350 4-Ports 10/100/1000Base-T Gigabit Ethernet PCI Express 2.1 x4 MLOM Server Network Adapter represents a high-performance modular LAN on motherboard (MLOM) solution engineered specifically for Cisco Unified Computing System (UCS) rack and blade servers. Designed around the Intel I350 Ethernet controller architecture, this adapter delivers reliable, scalable, and efficient Gigabit networking performance for enterprise workloads requiring stable multi-port copper connectivity.

Built for data centers, virtualization environments, and mission-critical server infrastructures, this four-port RJ45 Gigabit Ethernet adapter provides redundancy, throughput optimization, and flexible network segmentation. Its PCI Express 2.1 x4 interface ensures sufficient bandwidth allocation to support simultaneous traffic streams across all four ports while maintaining low latency and consistent packet delivery.

Core Design Philosophy and Integration Model

The MLOM form factor is a defining characteristic of this adapter, allowing seamless integration into Cisco UCS platforms without consuming traditional PCIe slots. Instead, it connects directly through a dedicated modular LAN interface on supported UCS motherboards. This design enhances system density, improves airflow management, and optimizes internal hardware layout for high-performance computing environments.

The Intel I350 chipset further enhances reliability through hardware-based offloading capabilities, reducing CPU overhead while handling networking tasks such as checksum calculations, interrupt moderation, and TCP segmentation. This ensures the server CPU remains available for application workloads rather than being burdened by network processing tasks.

Architecture and Hardware Engineering of Intel I350 Controller

Advanced Ethernet Controller Capabilities

At the core of the Cisco UCSC-MLOM-IRJ45 adapter is the Intel I350 Ethernet controller, a widely adopted chipset known for its stability, performance efficiency, and enterprise-grade reliability. This controller supports four independent Gigabit Ethernet ports operating at 10/100/1000Base-T speeds, ensuring backward compatibility with legacy network infrastructures while supporting modern high-speed LAN environments.

Each port operates independently, allowing administrators to implement link aggregation, load balancing, and failover configurations depending on network architecture requirements. This flexibility makes the adapter highly suitable for clustered computing environments, virtualization hosts, and database servers where uninterrupted connectivity is critical.

PCI Express 2.1 x4 Interface Optimization

The PCIe 2.1 x4 interface provides a robust communication channel between the network controller and the host system. With four lanes of dedicated bandwidth, the adapter ensures that all four Gigabit ports can operate simultaneously without congestion. This architecture is particularly beneficial for high-throughput applications such as distributed storage systems, cloud computing workloads, and virtual machine migration traffic.

The PCIe interface also improves latency characteristics, enabling faster packet processing and reduced bottlenecks in heavy network traffic scenarios. Combined with Intel’s advanced driver stack, this ensures optimal throughput under sustained load conditions.

Multi-Port Gigabit Ethernet Functionality and Use Cases

Four Independent RJ45 Network Interfaces

The Cisco UCSC-MLOM-IRJ45 adapter includes four RJ45 copper Ethernet ports, each capable of delivering 10/100/1000 Mbps connectivity. This multi-port configuration enables organizations to segment network traffic across different operational domains, such as management networks, storage networks, application traffic, and backup channels.

In virtualized environments, each port can be assigned to different virtual switches or VLANs, allowing hypervisors to isolate workloads while maintaining high-speed communication between virtual machines. This improves security, traffic efficiency, and overall network manageability.

Redundancy and Failover Capabilities

Enterprise environments require continuous uptime, and this adapter addresses that need through built-in failover support. If one port experiences a disruption, traffic can automatically be rerouted through another active port. This ensures uninterrupted network communication for critical applications such as ERP systems, database clusters, and virtualization hosts.

Cisco UCS Integration and Compatibility

Designed for Unified Computing System Infrastructure

The Cisco UCSC-MLOM-IRJ45 adapter is specifically engineered for Cisco UCS servers, integrating directly into the MLOM slot architecture. This tight integration ensures full compatibility with Cisco UCS Manager, enabling centralized management, monitoring, and configuration of network interfaces across the entire infrastructure.

Administrators benefit from unified control over server hardware and networking components, reducing operational complexity and improving deployment efficiency in large-scale data center environments.

Seamless Firmware and Driver Management

Cisco UCS platforms provide synchronized firmware updates and driver management for MLOM adapters. This ensures that the Intel I350-based network adapter remains updated with the latest performance enhancements, security patches, and compatibility improvements without requiring manual intervention on individual servers.

Unified Network Policy Enforcement

Through Cisco UCS Manager integration, network policies can be applied consistently across all servers utilizing the adapter. This includes VLAN assignment, QoS configurations, and traffic shaping rules, ensuring consistent behavior across the entire computing environment.

Performance Characteristics and Network Efficiency

The Intel I350 controller is designed to minimize latency in packet processing by leveraging hardware offloading features. This reduces the number of CPU cycles required for network-related tasks, allowing servers to allocate more resources to application processing. The result is improved responsiveness for latency-sensitive workloads such as financial applications, real-time analytics, and transactional databases.

Hardware Offloading Capabilities

The adapter supports a range of hardware offloading features including TCP segmentation offload, large send offload, and checksum offload. These capabilities reduce CPU utilization and improve overall system efficiency, especially in high-traffic environments where network throughput demands are constant.

Interrupt Moderation and CPU Efficiency

Interrupt moderation technology aggregates network interrupts into manageable batches, reducing CPU interrupt overhead. This improves system stability and ensures consistent performance under heavy network loads, particularly in virtualization environments where multiple virtual machines generate simultaneous traffic streams.

Enterprise Deployment Scenarios

Virtualization and Cloud Computing Environments

The Cisco UCSC-MLOM-IRJ45 adapter is widely deployed in virtualization environments powered by platforms such as VMware ESXi, Microsoft Hyper-V, and KVM-based hypervisors. Its multi-port architecture allows efficient distribution of virtual machine traffic across multiple physical network interfaces.

In cloud computing environments, the adapter supports scalable networking architectures where workloads are dynamically allocated across distributed server clusters. Its reliability and throughput consistency make it ideal for private cloud deployments and hybrid cloud integration.

Database and Storage Network Optimization

Database servers and storage nodes benefit significantly from the adapter’s multi-port design. By isolating storage traffic from application traffic, organizations can reduce congestion and improve data transfer efficiency. This is particularly useful in environments using network-attached storage or distributed storage clusters.

High Availability Database Clusters

In clustered database architectures, redundant network paths provided by the adapter ensure continuous synchronization between nodes. This reduces the risk of data inconsistency and improves failover performance in high availability setups.

Enterprise Application Hosting

Mission-critical applications such as ERP systems, CRM platforms, and enterprise web services rely on stable and predictable network performance. The adapter ensures consistent bandwidth allocation and supports traffic prioritization through QoS policies implemented at the network level.

Scalability and Network Expansion Capabilities

Support for Layered Network Architectures

The Cisco UCSC-MLOM-IRJ45 adapter is designed to operate within layered network infrastructures that include core, aggregation, and access layers. Its multi-port configuration enables flexible deployment across different network tiers, supporting segmentation strategies and traffic isolation.

VLAN and Network Segmentation Flexibility

Each port can be configured to support multiple VLANs, enabling logical separation of network traffic within a single physical adapter. This enhances security and allows organizations to isolate sensitive workloads from general traffic streams.

Traffic Prioritization and QoS Integration

Quality of Service integration ensures that mission-critical applications receive prioritized bandwidth allocation. This is essential in environments where latency-sensitive workloads coexist with bulk data transfer operations.

Security and Data Integrity Features

Hardware-Assisted Security Enhancements

The adapter incorporates hardware-level security features that help protect data integrity during transmission. These include checksum verification and secure packet handling mechanisms that reduce the risk of corrupted data transfers.

Secure Network Segmentation

By supporting VLAN-based segmentation, the adapter enables secure isolation of network traffic. This is essential for compliance-driven environments where data separation is required for regulatory adherence.

Resilient Data Transmission Protocols

The Intel I350 controller ensures reliable packet delivery even under high traffic conditions. This improves application stability and reduces the likelihood of data loss during peak network usage periods.

Operational Efficiency in Data Center Environments

Optimized Resource Utilization

By offloading networking tasks from the CPU, the adapter enhances overall server efficiency. This allows organizations to maximize compute resource utilization while maintaining high-performance network connectivity.

Scalable Infrastructure Deployment

The modular nature of the MLOM design supports scalable infrastructure growth. As organizations expand their server environments, additional adapters can be deployed without significant architectural changes.

Energy Efficiency Considerations

The Intel I350 chipset is designed for power-efficient operation, reducing energy consumption compared to older networking technologies. This contributes to lower operational costs in large-scale deployments.