Financial Low Latency Switches

jaye15394 · ‎10-14-2008

Does anyone have latency numbers for the different switch models?

I'm looking for port to port latency for the various Catalyst switches.

Thanks!

Scott Cannon · ‎10-14-2008

Hi,

I assume your talking about port-to-port across the backplane?

You'll find this in the data sheet for each switch.

Start here: http://www.cisco.com/en/US/products/hw/switches/index.html

Joseph W. Doherty · ‎10-15-2008

I haven't seen that well documented. Likely reason, most modern switches seem to have unloaded latencies under 1 ms, and actual latencies most dependent on internal queuing based on traffic load and traffic distribution. (Probably similar reason why you no longer see "fragment free" or "cut thru" switching to try to reduce switch latency.) You mind find this documented for especially high performance switches designed for supporting something like grid computing.