arista 7500R 7504R
The Arista 7504R is a 4-slot modular datacenter spine and routing chassis delivering deep packet buffering and carrier-class route scaling. Occupying 7U of rack space, the 7504R provides up to 384GB of packet buffering across four payload slots, non-blocking 100GbE line cards, and up to 19.2 Tbps of switching bandwidth for large cloud networks, content providers, and Internet exchange points.
Specifications
| Brand | arista |
|---|---|
| Family | 7500R |
| Form factor | modular chassis |
| Released | Mar 2016 |
| End of sale | Mar 2021 |
| End of support | Mar 2026 |
| Chassis slots | 4 |
| Line card slots | 4 payload line card slots |
| Chassis height | 7U rack mount |
| System bandwidth | Up to 19.2 Tbps / 7.2 Bpps forwarding throughput |
| Packet buffering | Up to 384GB of deep VOQ packet buffer across line cards |
| Per slot bandwidth | Up to 4.8 Tbps per slot |
Generations
- Previous generation: arista 7500E 7504E
- Next generation: arista 7500R3 7504R3
Works together
How the arista 7500R 7504R connects to servers, storage and the network: 3 ways, with the parts and products on each path.
iSCSI and NVMe/TCP over Ethernet
Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.
Servers
HPE Edgeline EL1000 1U converged edge system
HPE Edgeline EL4000 1U converged edge system
HPE Synergy 660 Gen10 Compute Module full-height compute module
HPE Apollo 4200 Gen9 2U rack
HPE ProLiant DL20 Gen9 1U rack
HPE ProLiant DL385 Gen10 2U rack
Adapters for the server
BCM957504A5041CC Broadcom NetXtreme-E BCM57504 Quad-Port 100GbE QSFP56 PCIe 4.0 Ethernet Network Adapter
540-BDBX Dell NVIDIA Mellanox ConnectX-6 Dx Dual Port 100GbE QSFP56 PCIe Adapter
540-BDCF Dell Intel E810-CQDA2 Dual Port 100GbE QSFP28 PCIe Gen4 Adapter
540-BDCP Dell Broadcom 57508 Dual Port 100GbE QSFP56 PCIe Gen4 Adapter
Storage
Dell PowerStore 7000T 2U rack
Lenovo ThinkSystem DM7100H 4U rack
Lenovo ThinkSystem DM5100F 2U rack
Dell PowerStore 1200T 2U rack
Dell PowerStore 3200T 2U rack
Dell PowerStore 5200T 2U rack
Optics
QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
QSFP-100G-SR4-S Cisco 100GBASE-SR4 QSFP28 Optical Transceiver
407-BBOY Dell 100GbE QSFP28 SR4 Optical Transceiver (850nm, 100m MPO-12)
File storage (NFS and SMB)
Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.
Servers
- HPE Edgeline EL1000 1U converged edge system
- HPE Edgeline EL4000 1U converged edge system
- HPE Synergy 660 Gen10 Compute Module full-height compute module
- HPE Apollo 4200 Gen9 2U rack
- HPE ProLiant DL20 Gen9 1U rack
- HPE ProLiant DL385 Gen10 2U rack
Adapters for the server
- BCM957504A5041CC Broadcom NetXtreme-E BCM57504 Quad-Port 100GbE QSFP56 PCIe 4.0 Ethernet Network Adapter
- 540-BDBX Dell NVIDIA Mellanox ConnectX-6 Dx Dual Port 100GbE QSFP56 PCIe Adapter
- 540-BDCF Dell Intel E810-CQDA2 Dual Port 100GbE QSFP28 PCIe Gen4 Adapter
- 540-BDCP Dell Broadcom 57508 Dual Port 100GbE QSFP56 PCIe Gen4 Adapter
Storage
- Dell PowerStore 7000T 2U rack
Dell PowerScale F600 1U rack- Lenovo ThinkSystem DM7100H 4U rack
- Lenovo ThinkSystem DM5100F 2U rack
Dell PowerScale F900 2U rack
Dell PowerScale H700 4U
Optics
- QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
- QSFP-100G-SR4-S Cisco 100GBASE-SR4 QSFP28 Optical Transceiver
- 407-BBOY Dell 100GbE QSFP28 SR4 Optical Transceiver (850nm, 100m MPO-12)
Hyperconverged cluster
Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.
HCI nodes
HPE SimpliVity 380 Gen10 2U rack
HPE SimpliVity 380 Gen9 2U rack
HPE SimpliVity 325 Gen10 1U rack
HPE SimpliVity 380 Gen10 G 2U rack
Adapters for the server
- BCM957504A5041CC Broadcom NetXtreme-E BCM57504 Quad-Port 100GbE QSFP56 PCIe 4.0 Ethernet Network Adapter
- 540-BDBX Dell NVIDIA Mellanox ConnectX-6 Dx Dual Port 100GbE QSFP56 PCIe Adapter
- 540-BDCF Dell Intel E810-CQDA2 Dual Port 100GbE QSFP28 PCIe Gen4 Adapter
- 540-BDCP Dell Broadcom 57508 Dual Port 100GbE QSFP56 PCIe Gen4 Adapter
Optics
- QSFP-100G-SR4 Arista 100GBASE-SR4 QSFP28 Optical Transceiver
- QSFP-100G-SR4-S Cisco 100GBASE-SR4 QSFP28 Optical Transceiver
- 407-BBOY Dell 100GbE QSFP28 SR4 Optical Transceiver (850nm, 100m MPO-12)
Plan and size it
- Draw this setup in the topology planner mrplanb.com
- Add up rack power and space rack-density.com
- iSCSI explained mrplanb.com
- Virtualization storage Ledger: scored storage platforms mrplanb.com
- Network monitoring tools compared mrplanb.com
Check compatibility with Arista
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Arista has tested with the arista 7500R 7504R.
- Compatibility Arista transceivers and cables
- Support Arista Support
Equivalent models from other brands
FAQ
What is the primary benefit of the R-Series modular chassis?
R-Series line cards incorporate Jericho silicon with massive gigabyte-scale packet buffers and full internet BGP routing scale.
Does the 7504R support 100GbE optics?
Yes, populating 36-port 100GbE line cards (7500R-36CQ) provides up to 144 line-rate 100GbE ports in 7U.
Buying or selling 7504R?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Arista 7504R Product Overview, checked 2026-10-27
- Arista 7504R Data Sheet and Specifications, checked 2026-10-27