• Silver-colored rack-mounted arista dcs-7800r3-48cqm-lc network switches with 48 ports and ventilation slots shown from back
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Arista

Arista DCS-7800R3-48CQM-LC | 7800R3 48-Port 100G Line Card with MACsec

DCS-7800R3-48CQM-LC

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Description

The Arista DCS-7800R3-48CQM-LC is a high-performance 48-port 100 Gigabit line card designed for the 7800R3 Series modular chassis. Delivering up to 9.6 Tbps of full-duplex bandwidth with integrated MACsec encryption, this line card is purpose-built for large-scale data center, cloud, and service provider networks requiring wire-speed performance with comprehensive layer 2 and layer 3 security. Compatible with all 7800R Series chassis options including the 7804R, 7808R, 7812R, and 7816R, it provides FlexRoute Internet-scale routing, algorithmic ACLs, and deep buffer VOQ architecture for lossless forwarding.

Features

IEEE 802.1AE MACsec encryption with AES-256-GCM for secure layer 2 connectivity
- Deep buffer VOQ architecture eliminates head-of-line blocking and packet drops
- FlexRoute engine for scalable Internet peering and service provider deployments
- Algorithmic ACLs for flexible pattern matching and large-scale access control
- Accelerated sFlow sampling at line rate for network visibility and telemetry
- Full layer 2 and layer 3 feature set: VLAN, STP, MLAG, ECMP, BGP, OSPF, IS-IS
- MPLS, Segment Routing, and EVPN-VXLAN for advanced network virtualization
- Precision Time Protocol (PTP) and Network Time Protocol (NTP) support
- Advanced QoS with hierarchical scheduling, weighted fair queuing, and shaping
- Comprehensive traffic counters and classification for real-time monitoring
- IPFIX and sFlow for network forensics and analytics
- Arista CloudVision integration for streaming telemetry and network-wide visibility
- Hot-swappable for continuous operations and zero-downtime maintenance
- Non-blocking fabric connectivity to all fabric modules
- Support for diverse 100G optics: SR4, LR4, CWDM4, PSM4, and direct-attach copper

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

48x 100 Gigabit Ethernet QSFP28 ports
- Up to 9.6 Tbps full-duplex bandwidth per line card
- Wire-speed forwarding with MACsec encryption (AES-256-GCM)
- Supports 1x 100G, 2x 50G, 4x 25G, or 4x 10G per port (via breakout)
- Deep buffer virtual output queue (VOQ) architecture with ~40 msec buffer per ingress port
- FlexRoute engine for Internet-scale routing
- Jericho2 packet processor with 12 integrated gearboxes
- Compatible with 7804R, 7808R, 7812R, 7816R chassis (all require fabric modules)
- Hitless port speed configuration changes
- Hot-swappable line card module
- Front-to-rear airflow
- Runs Arista EOS (Extensible Operating System)
- Layer 2 and Layer 3 switching/routing with MPLS, Segment Routing, EVPN-VXLAN support
- Accelerated sFlow and algorithmic ACL support
- Non-blocking fabric connectivity

FAQs

Q: What chassis models is the DCS-7800R3-48CQM-LC compatible with?
A: This line card is compatible with all Arista 7800R Series chassis: the 7804R (4-slot), 7808R (8-slot), 7812R (12-slot), and 7816R (16-slot). All chassis require fabric modules for proper operation.

Q: Does this line card support port breakout configurations?
A: Yes, each 100G QSFP28 port can be configured as 1x 100G, 2x 50G, 4x 25G, or 4x 10G using appropriate breakout cables and transceivers. Port speed changes are hitless with no downtime.

Q: What MACsec encryption capabilities does this line card provide?
A: The DCS-7800R3-48CQM-LC supports IEEE 802.1AE MACsec with AES-256-GCM encryption at line rate across all 48 ports, providing point-to-point link layer encryption. A MACsec license is required per chassis for activation.

Q: Can this line card be mixed with other 7800R3 Series line cards in the same chassis?
A: Yes, the DCS-7800R3-48CQM-LC is fully interoperable with all other 7800R3 and 7800R3A Series line cards, allowing flexible configurations of 100G and 400G modules within the same chassis.

Q: What routing table sizes does this line card support?
A: This line card supports FlexRoute for Internet-scale routing with flexible profiles. For larger routing tables exceeding 1 million routes, consider the DCS-7800R3K-48CQ-LC variant which supports up to 5 million IP routes.

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