Can't turn on Jumbo Frames on bge0
brueffer at FreeBSD.org
Sat Jun 10 19:09:34 UTC 2006
On Fri, Jun 09, 2006 at 08:19:00PM -0400, Brad wrote:
> On Fri, Jun 09, 2006 at 08:05:47PM -0400, Mikhail Teterin wrote:
> > ?'?????? 09 ??????? 2006 19:57, Brad ???????:
> > > There is a mistake on that web-page. None of Broadcom's PCI Express
> > > chipsets support Jumbo frames.
> > Indeed. Our bge(4) manual page says:
> > The BCM570x also supports jumbo frames, which can be configured via the
> > interface MTU setting. Selecting an MTU larger than 1500 bytes with the
> > ifconfig(8) utility configures the adapter to receive and transmit jumbo
> > frames. Using jumbo frames can greatly improve performance for certain
> > tasks, such as file transfers and data streaming.
> > Mine is BCM5751 -- I guess, I'm out of luck...
> I made sure the OpenBSD man page is very clear as to what models do support Jumbo
> frames after having a few end-users ask similar questions.
> The BCM5700, BCM5701, BCM5703, BCM5704, BCM5714 and BCM5780 are capable
> of supporting Jumbo frames, which can be configured via the interface MTU
> setting. Selecting an MTU larger than 1500 bytes with the ifconfig(8)
> utility configures the adapter to receive and transmit Jumbo frames. Us-
> ing Jumbo frames can greatly improve performance for certain tasks, such
> as file transfers and data streaming.
> I would suggest doing the same thing for the FreeBSD man page since there are a
> number of chipset revisions which do not support Jumbo's.
Thanks for the suggestion, I added this to our manpage.
Christian Brueffer chris at unixpages.org brueffer at FreeBSD.org
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