At 02:31 23/08/01, Mikael Abrahamsson wrote:
...most vendors support at least 4470MTU on their GigE ports these days.
True. As near as I can tell, nearly every vendor is supporting ~9K MTU on GigE/10 GigE ports. Not all of the vendors with ~9K MTU support permit configuration of 4470 byte MTU -- a number of them have binary configuration knobs for ~1500 byte/~9K byte MTU, though clearly a number of vendors do permit configuration of a 4470 MTU. In some cases that configuration constraint might just be a software issue. In other cases, there might be hardware issues. The MTU size is related to certain other timer parameters and isn't really entirely an independent variable, btw. Folks buying GigE interfaces might want to investigate these factors as part of their product evaluations. Ran rja@inet.org