Port-to-port latency tests, how to?

adminhftit · ‎12-28-2015

Hello all.

we interesting where from ns developers takes.

for example:

exalink fusion

110 nanoseconds port to port latency with full layer 2 switching. The

industry's lowest latency cut-through layer 2 switch. Supports ultra-low

latency multicast and broadcast.

Latency

Measured front panel port to port:

➔ 5 ns (Layer 1 tap/patch)

➔ 95 ns (Layer 2 aggregation)

➔ 110ns (Layer 2 switching) ( !!!we interesting in this parameter )

mellanox sx1012

Lowest Latency

• 220nsec for 40/56GbE

• 250nsec for 10GbE

• Cut-through latency between ports in different speeds

but cisco got different numbers, by packet size.

so what are real tests for this NS?

how to make REAL compare.

Philip D'Ath · ‎12-29-2015

Go find a third party independent report. Comparing marketing numbers is not going to help you.

adminhftit · ‎12-30-2015

yup. some reports from tolly was interesting. and supports of metamako, mellanox and exablaze send me their test with RFC 2544 FIFO .