Campus Network as a Service
Hardware options
Help on selecting hardware that fits requirements of campus networks
Arista dist switch options
All Arista switches offers EVPN+VXLAN feature set with the correct license
| Model | Downlinks | Uplinks | ACL Entries | Packet buffer | MAC | IPv4 Routes | Chipset | Notes |
|---|---|---|---|---|---|---|---|---|
| 48x25G SFP+ | 8x100G QSFP28 | 2K | 32 MB | 160k | 144k host routes 32k LPM | 1x Trident3-X5 | ||
| 48x10G SFP+ | 6x100G QSFP28 | 24K | 4 GB | 1x Jericho | Not recommended, no overlay multicast support | |||
| DCS-7280SR3-48YC8-F | 48x25G SFP28 | 8x100G QSFP28 | 24K | 4 GB | 224k | 1450k | 1x Jericho2 | |
| 7280SR3-40YC6 | 40x25G SFP28 | 6x100G QSFP28 | 12K | 2 GB | 128k | 1100k | 1x Qumran2a (half jericho) | The first 36 SFP28 ports are connected directly to the Qumran chip and are capable of supporting 1/10/25G. A gearbox sits behind ports 37-40, converting the chip’s 50G lanes to 10G or 25G. |
https://www.arista.com/en/company/news/press-release/4390-pr-20180329 7050X3 chipset
https://packetpushers.net/broadcom-trident3-programmable-varied-volume/ Trident3 ASIC versions
https://www.arista.com/assets/data/pdf/Whitepapers/7280R3-Platform-Architecture-WP.pdf SR3 scale metrics, chip diagrams etc
TCAM / ACL usage on 7050X3
Managed to fit 225 complex ACL entries like "10 permit tcp host 1.0.0.0 host 2.0.0.0 range 1100 1199" (randomized port ranges) in hardware causing 99.8% TCAM usage:
#show platform trident tcam
TCAM group 10 uses 1533 entries and can use up to 3 more.
Router ACL uses 1533 entries.
R-series should be able to fit more than 10X more (not tested)