Alcatel-Lucent CPU7-2 3BA23259AAAD 7750 SR Control Processor Module

The Alcatel‑Lucent CPU7‑2 (3BA23259AAAD) is a high‑performance control processor module designed for the 7750 SR service router platform. It acts as the central routing engine, handling all control plane functions including routing protocol processing, MPLS signaling, system management, and user configuration. The CPU7‑2 is a critical component for ensuring stable, scalable, and resilient network operation in carrier and enterprise environments.

Overview

The CPU7‑2 is based on a multi‑core CPU architecture with hardware acceleration for routing table calculations and security functions. It provides ample memory for storing large BGP tables, MPLS forwarding information bases (FIBs), and system logs. The module supports up to two redundant units per chassis in an active‑standby configuration, offering sub‑second failover for uninterrupted service. It is compatible with the 7750 SR‑7, SR‑12, and other chassis that accept the CPM slot.

Key Features

• Multi‑core processor with advanced cryptographic acceleration

• Supports up to 16 GB DRAM and 8 GB flash storage

• Full routing protocol suite: OSPF, IS‑IS, BGP‑4, RIP, PIM, IGMP

• MPLS control plane: LDP, RSVP‑TE, BGP‑LU, and Segment Routing

• Redundant hot‑standby with hitless switchover

• Integrated hardware security engine for IPsec and MACsec

• Management interfaces: console, auxiliary, and dedicated management Ethernet

• Supports in‑service software upgrades (ISSU) with zero packet loss

Technical Specifications

• Processor: 4‑core, 2.4 GHz, with AES‑NI

• Memory: 16 GB DDR4 ECC, 8 GB eMMC flash

• Routing Table Capacity: 16 million IPv4 routes / 8 million IPv6 routes

• Management Ports: 1x RJ‑45 console, 1x RJ‑45 AUX, 2x 1G/10G management Ethernet

• Power Consumption: 120 W typical

• Operating Temperature: 0°C to 45°C

• Dimensions: Standard 7750 SR slot format

Applications

The CPU7‑2 is used in all 7750 SR deployments requiring high route scale and robust control plane performance. It is essential for Internet peering routers, MPLS backbone nodes, and large VPN service aggregators. The redundant configuration ensures that network control remains intact even during hardware maintenance or unexpected failures.

Compatibility

This module is compatible with 7750 SR‑7, SR‑12, and selected SR‑4 chassis with appropriate backplane support. It requires SR OS release 15.0 or later for full feature enablement. It works alongside any SFM5 fabric modules and I/O cards, including the latest high‑speed interfaces.

Installation and Redundancy

Install the CPU7‑2 in one of the two designated control slots. For redundancy, insert a second identical module; the system will automatically elect an active and standby. Synchronization of configuration and state data is continuous, ensuring that the standby is ready to take over instantly. Replacement of a faulty unit is hot‑swappable after the standby takes control.

Conclusion

The Alcatel‑Lucent CPU7‑2 3BA23259AAAD is a powerful, reliable control processor that provides the intelligence and resilience needed for large‑scale IP/MPLS networks. Its advanced hardware, rich protocol support, and high‑availability features make it the brain of the 7750 SR platform, enabling operators to deliver mission‑critical services with confidence.