RFC 2544 Latency Testing on the Arista 7100 Series
Latency is a key performance metric for applications in the services industries and is defined as the elapse of time between the request for data and its delivery. With the advent of cloud computing and 10 Gigabit Ethernet, low-latency requirements that were prevalent only in the Infiniband-HPC space have now paved their way into enterprise data centers. This can be attributed to the fact that in today’s market, every millisecond gained translates to sales, opportunity and a competitive edge. The shift to the cloud-networking paradigm has also driven the need for low latency network devices to meet hyper-scale computing environments. It is important for a cloud network to offer low latency, non-blocking throughput and scalability.
Arista’s 7100 series of 10 Gigabit Ethernet switches offer up to 48 ports of non-blocking bandwidth at line rate with latency as low as 600ns.
The 7100 series comprises of the 7124S, the 7148S and the 7148SX offering high-performance, low-latency switching with the highest port density in a 1 RU form factor. Latency measurements conform to the RFC 2544 benchmarking methodology.
7100 Series - RFC 2544 Latency - Layer 2
| Packet Size | 7124S | 7148S | 7148SX |
|---|---|---|---|
| 64 | 583 ns | 903 ns | 1245 ns |
| 128 | 608 ns | 966 ns | 1306 ns |
| 256 | 660 ns | 1030 ns | 1422 ns |
| 512 | 642 ns | 1031 ns | 1423 ns |
| 1024 | 648 ns | 1036 ns | 1423 ns |
| 1280 | 658 ns | 1034 ns | 1417 ns |
| 1518 | 648 ns | 1017 ns | 1413 ns |
| 9216 | 661 ns | 1020 ns | 1420 ns |
7100 Series - RFC 2544 Latency - Layer 3
| Packet Size | 7124S | 7148S | 7148SX |
|---|---|---|---|
| 78 | 624 ns | 997 ns | 1384 ns |
| 128 | 652 ns | 1020 ns | 1419 ns |
| 256 | 688 ns | 1093 ns | 1522 ns |
| 512 | 693 ns | 1100 ns | 1531 ns |
| 1024 | 679 ns | 1087 ns | 1527 ns |
| 1280 | 688 ns | 1089 ns | 1508 ns |
| 1518 | 682 ns | 1077 ns | 1502 ns |
| 9216 | 685 ns | 1083 ns | 1513 ns |
