• Gray metal back side of arista dcs-7800r3-48cq2-lc 7800r3 48-port 100g qsfp28 line card with ventilation slots
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Arista

Arista DCS-7800R3-48CQ2-LC | 7800R3 48-Port 100G QSFP28 Line Card with CPU

DCS-7800R3-48CQ2-LC

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Description

The Arista DCS-7800R3-48CQ2-LC is a high-performance line card designed for the 7800R3 Series modular data center switches, delivering 48 ports of wire-speed 100 Gigabit Ethernet via QSFP28 interfaces. With an integrated CPU and deep buffer architecture, this line card provides up to 9.6 Tbps of full-duplex bandwidth and supports flexible deployment in large-scale cloud data centers, internet peering, and mission-critical environments. Built on Broadcom Jericho2 architecture with virtual output queuing for lossless forwarding and low latency performance.

Features

48x 100GbE QSFP28 ports with support for 100G, 40G, 4x25G, and 4x10G breakout modes
- Integrated CPU for distributed control plane processing and management
- Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- Deep packet buffers for lossless forwarding in congested scenarios
- Broadcom Jericho2 packet processor with 10 Tbps per chip capacity
- FlexRoute engine for Internet-scale routing with millions of routes
- Accelerated sFlow sampling at line rate for network visibility
- Algorithmic ACLs with up to 100K entries per forwarding engine
- Non-blocking fabric architecture with 100% efficiency
- MPLS, Segment Routing, EVPN-VXLAN, and L2/L3 VPN support
- Precision Time Protocol (PTP) for network synchronization
- Advanced QoS with weighted fair queuing and traffic shaping
- Multi-port mirroring and DANZ for network monitoring
- Compatible with Arista EOS for unified management and automation
- Hot-swappable design for continuous operations
- Front-to-rear airflow for optimized data center cooling

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Form Factor: Line card module for Arista 7800R3 Series chassis
- Port Configuration: 48x 100GbE QSFP28 ports
- Switching Capacity: Up to 9.6 Tbps full-duplex bandwidth
- Architecture: Broadcom Jericho2 packet processor with integrated CPU
- Buffer Memory: Deep packet buffer with Virtual Output Queue (VOQ) architecture
- Port Flexibility: Supports 100G, 40G, and breakout configurations (4x25G, 4x10G)
- Routing Scale: FlexRoute engine supports Internet-scale routing tables
- Fabric Connectivity: Non-blocking fabric connectivity up to 45.6 Tbps per slot
- Management: Compatible with Arista EOS (Extensible Operating System)
- Telemetry: Accelerated sFlow sampling at line rate
- Hot-Swap: Field-replaceable line card with hot-swap capability
- Maximum Power Draw: Up to 2.4kW per line card slot
- Compatibility: Compatible with 7804R3, 7808R3, 7812R3, and 7816R3 chassis

FAQs

Q: Which chassis models are compatible with the DCS-7800R3-48CQ2-LC?
A: This line card is compatible with all Arista 7800R3 Series chassis including the 7804R3 (4-slot), 7808R3 (8-slot), 7812R3 (12-slot), and 7816R3 (16-slot) modular systems. All chassis support hot-swap installation and require fabric modules for operation.

Q: What is the difference between the 48CQ2-LC and 48CQ-LC models?
A: The DCS-7800R3-48CQ2-LC includes an integrated CPU for distributed processing and enhanced management capabilities, while the 48CQ-LC is a wirespeed line card without CPU. The 48CQ2-LC provides additional processing resources for advanced routing and telemetry features.

Q: Does this line card support MACsec encryption?
A: No, the DCS-7800R3-48CQ2-LC is a standard 100G line card without MACsec encryption. For MACsec capabilities, consider the DCS-7800R3-48CQM2-LC variant which includes enhanced MACsec encryption support at line rate.

Q: What routing features does the FlexRoute engine support?
A: The FlexRoute engine enables Internet-scale routing with support for millions of routes, making it suitable for service provider and cloud data center deployments. It supports IPv4/IPv6, MPLS, Segment Routing, EVPN-VXLAN, and advanced L2/L3 features with flexible table allocation.

Q: Can I mix different 7800R3 line card models in the same chassis?
A: Yes, the Arista 7800R3 chassis supports heterogeneous line card configurations. You can mix different 7800R3 and 7800R3A line card models including various port densities and feature sets, providing deployment flexibility and investment protection.

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