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Arista 7800R3 Scalable Core Switch Routers - Refurbished, Used, and New
Arista 7800R3 switch routers are modular chassis systems for cloud, service provider and large enterprise cores, where one box has to carry hundreds of 100G and 400G ports with deep buffers and full Internet-scale routing tables. The chassis holds redundant supervisors, a set of switch fabric modules and a mix of line cards, all running Arista EOS. This collection covers the parts that go into a 7800R3 chassis: the DCS-7800-SUP1A supervisor, DCS-7808R3 fabric modules, and 100G and 400G line cards. NetworkTigers sells 7800R3 supervisors, fabric modules and line cards refurbished, used and new, and every unit is tested before it ships so it works when it arrives.
Arista 7800R3 modules and line cards
| Part | Used for | Shop |
|---|---|---|
| DCS-7800-SUP1A | Supervisor module: control plane and management for the 7800R3 chassis, run in pairs for redundancy | DCS-7800-SUP1A |
| DCS-7808R3-FM | Switch fabric module for the 8-slot 7808 chassis, first generation | DCS-7808R3-FM |
| DCS-7808R3-FM2 | Switch fabric module for the 7808 chassis, second generation | DCS-7808R3-FM2 |
| DCS-7800R3-48CQ-LC | 48x 100G QSFP28 line card | DCS-7800R3-48CQ-LC |
| DCS-7800R3-48CQM-LC | 48x 100G QSFP28 line card with MACsec encryption on the ports | DCS-7800R3-48CQM-LC |
| DCS-7800R3-36D-LC | 36x 400G QSFP-DD line card | DCS-7800R3-36D-LC |
| DCS-7800R3-36P-LC | 36x 400G line card, OSFP cage | DCS-7800R3-36P-LC |
| Related Arista | Other Arista R-series routing platforms and the optics for 400G ports | 7500R | 7280R | 7500 | All Arista | 400G optics |
Which 7800R3 parts do I need?
Start from the chassis you have, since fabric modules are specific to the slot count: the DCS-7808R3-FM and FM2 fit the 8-slot 7808, and a 4, 12 or 16 slot chassis takes its own fabric part. Keep every fabric slot in one chassis on the same generation, because a 7808 runs a full set of FM or a full set of FM2, not a mix, and the fabric generation sets which line cards and port speeds the chassis supports at full bandwidth. Pick line cards by port speed and optic cage: 48CQ for 100G QSFP28, 36D for 400G QSFP-DD and 36P for 400G OSFP, and choose 48CQM when you need MACsec on links that leave the building. Two supervisors give you hitless control-plane failover. Tell us your chassis, supervisor, fabric modules, EOS release and the line cards already installed, and we will confirm the card you want is supported in that combination before you order.
Frequently asked questions
Can a 400G line card be used for 100G ports?
Yes. A 400G QSFP-DD or OSFP port accepts 100G optics and breakout cables that match its cage, so a 36-port 400G card can serve a mix of 100G and 400G links. The breakout modes available depend on the card and the EOS release.
Does the line card come with optics?
No. Line cards ship with empty cages unless the listing says otherwise. Transceivers and cables are sold separately so you can match reach and connector type to each link.
What is the difference between the 48CQ-LC and the 48CQM-LC?
Both carry 48x 100G QSFP28 ports on the same chassis slot. The M version adds hardware MACsec, which encrypts traffic at line rate on each port for data center interconnect and peering links where the fiber leaves your control.
NetworkTigers has sold enterprise network equipment since 1996. Every module and line card carries the NetworkTigers 365-day warranty. Filling a chassis? Ask us for a quote.
Arista DCS-7800R3-48CQM-LC 48x 100GB QSFP28 w/ MACsec Router Line Card
NEW Arista DCS-7800R3-48CQ-LC 7800R3 48x 100 Gigabit QSFP Switch Line Card
Arista DCS-7800R3-48CQ-LC 7800R3 48x 100 Gigabit QSFP Switch Line Card
Arista DCS-7808R3-FM2 7800R3 Series Switch Fabric Module for 7808 Chassis
Arista DCS-7808R3-FM 7800R3 Series Switch Fabric Module for 7808 Chassis
$ 1,057.99
Call if you need more
Arista DCS-7800R3-36P-LC 7800R3 36x 400 Gigabit QSFP Switch Line Card
$ 7,875.99
$ 10,687.99
Call if you need more
Arista DCS-7800R3-36D-LC 7800R3 Series 36x 400GB QSFP-DD Switch Line Card
$ 25,312.99
$ 41,906.99
Call if you need more
Arista DCS-7800-SUP1A 7800R3 Series Supervisor1A Module
$ 8,999.99
Call if you need more
