• Silver-colored arista dcs-7800r3-48cqms-lc rack-mounted network switches with 48-port 100g qsfp line card and ventilation slots
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Arista

Arista DCS-7800R3-48CQMS-LC | 7800R3 48-Port 100G QSFP Line Card, Enhanced MACsec

DCS-7800R3-48CQMS-LC

Stock Status: Enquire

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Description

The Arista DCS-7800R3-48CQMS-LC is a high-performance line card for the 7800R3 Series modular chassis, delivering 48 ports of 100GbE QSFP connectivity with enhanced MACsec encryption. Designed for large-scale data center spine architectures, internet peering, and secure DCI deployments, this line card provides 9.6 Tbps full duplex throughput with deep buffer VOQ architecture and 8GB packet buffer for lossless forwarding. It supports FlexRoute for internet-scale routing, Algorithmic ACLs, and Accelerated sFlow for comprehensive network visibility.

Features

Enhanced MACsec encryption on all 48 ports for secure Layer 2 connectivity
- Deep buffer VOQ architecture eliminates head-of-line blocking and packet loss
- FlexRoute engine supports internet-scale routing tables with low power consumption
- Algorithmic ACLs for flexible pattern matching and policy-based forwarding
- Accelerated sFlow sampling at line rate with no impact on forwarding performance
- Non-blocking fabric connectivity with full active-active fabric utilization
- Hot-swappable design for high availability and continuous operations
- Support for comprehensive Layer 2 and Layer 3 data center protocols
- EVPN-VXLAN, MPLS, and Segment Routing support for modern cloud architectures
- 40ms traffic buffer per ingress port for congestion handling
- Advanced QoS with weighted fair queuing, fixed priority, and hybrid schemes
- Comprehensive traffic counters with up to 16 classifications per flow
- Jericho2 packet processor with hardware-based forwarding
- Compatible with all 7800R3 Series line cards for flexible deployment

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

48 x 100GbE QSFP ports
- Throughput: 4.8 Tbps (9.6 Tbps full duplex)
- Packet forwarding rate: 2 Bpps
- Packet buffer: 8 GB dedicated memory per line card
- MACsec encryption: All ports with enhanced security
- Port flexibility: Supports 100G, 40G (no MACsec), 25G, and 10G via breakout
- Maximum interfaces: 96 (with breakout configuration)
- Typical power consumption: 501W (666W max, excluding optics)
- Weight: 19.1 lbs (8.68 kg)
- Dimensions: 18.9" x 2.1" x 17.8" (48.1 x 5.4 x 45.2 cm)
- Chassis compatibility: 7804R, 7808R, 7812R, 7816R
- Management: Arista EOS with CLI, SNMP, NetDB, CloudVision support
- Advanced features: FlexRoute, Accelerated sFlow, Algorithmic ACLs, deep buffer VOQ architecture

FAQs

Q: What chassis is this line card compatible with?
A: The DCS-7800R3-48CQMS-LC is compatible with all Arista 7800R3 Series chassis including the 7804R (4-slot), 7808R (8-slot), 7812R (12-slot), and 7816R (16-slot) modular systems. It requires fabric modules and supervisor modules to be installed in the chassis for operation.

Q: Does this line card require a separate encryption license?
A: Yes, MACsec encryption functionality requires a separate license. Depending on your chassis size, you need either LIC-MOD-1-MACsec (4-slot), LIC-MOD-2-MACsec (8-slot), LIC-MOD-3-MACsec (12-slot), or LIC-MOD-4-MACsec (16-slot) to enable encryption features on MACsec-capable line cards.

Q: What is the difference between this spare line card and the CPU version?
A: The DCS-7800R3-48CQMS-LC is a spare line card without an integrated CPU, designed for use in existing chassis with supervisors already providing control plane functions. The DCS-7800R3-48CQM2-LC variant includes an onboard CPU for additional control plane redundancy.

Q: Can this line card support breakout configurations?
A: Yes, the 48 QSFP ports can be broken out to support up to 96 interfaces at lower speeds including 25GbE and 10GbE. Port speed changes are hitless, meaning you can reconfigure port speeds without disrupting traffic on other ports.

Q: What deployment scenarios is this line card best suited for?
A: This line card excels in data center spine architectures, internet peering environments, secure data center interconnect (DCI), and provider edge networks requiring high-density 100G connectivity with hardware-based encryption. The deep buffer architecture makes it ideal for mixed traffic environments with storage, multicast, and real-time workloads.

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