Hi Jesse, Thanks for the reply and options/alternative provided.
Let me try out the options suggested by you. Thanks & Regards, --Rajeev On 12/5/08, Brandeburg, Jesse <[EMAIL PROTECTED]> wrote: > You cannot reduce the link speed of a 1GB fiber NIC. If you're trying to > slow it down you could massively decrease the interrupt rate using the > InterruptThrottleRate module parameter, and try setting it to 512,512 or > something. > > The other preferred way would be to probably use a qdisc in linux like htb > or something to throttle the transmit rate in the stack. > > Jesse > > > -----Original Message----- > From: rajeev naidu [mailto:[EMAIL PROTECTED] > Sent: Thursday, December 04, 2008 10:58 PM > To: Ronciak, John > Cc: [email protected]; Linux NICS > Subject: Re: [E1000-devel] Fiber NICs speed > > Hi John, > > Thanks for the input. I am referring Fiber Ethernet(1G) port. > > Is there any way or workaround possible to reduce the speed > programatically by tweaking > some setting? > > Regards, > --Rajeev > > On 12/1/08, Ronciak, John <[EMAIL PROTECTED]> wrote: >> First do you mean 82571? Also, are you really talking Fiber Channel or >> are >> you talking about using a fiber Ethernet port? The 82571 won't work in a >> Fiber Channel environment. Connected to a fiber Ethernet port it will >> only >> operate on a 1 gigabit full duplex link, by specification. So if you are >> trying to change speeds on a fiber Ethernet port, the error messages are >> correct. >> >> Cheers, >> John >> ----------------------------------------------------------- >> "Those who would give up essential Liberty, to purchase a little temporary >> Safety, deserve neither Liberty nor Safety.", Benjamin Franklin 1755 >> >> >>>-----Original Message----- >>>From: rajeev naidu [mailto:[EMAIL PROTECTED] >>>Sent: Monday, December 01, 2008 12:10 AM >>>To: Linux NICS >>>Cc: [email protected] >>>Subject: [E1000-devel] Fiber NICs speed >>> >>>Hi, >>> >>>I am working on a H/W which uses e1000 82751 NIC. The Network >>>interface connected(uses) via Fiber channel. I am facing a problem >>>when i try to change(reduce the speed) the Interface space 100 or 10. >>>The ioctl command fails with -1 ("Unsupported Speed/Duplex >>>configuration") and when looked into the code i found a statement: >>> >>>/* Fiber NICs only allow 1000 gbps Full duplex */ . >>> >>>Can somebody tell me is there any H/W limitation? >>> >>>Regards, >>>--Rajesh >>> >>>--------------------------------------------------------------- >>>---------- >>>This SF.Net email is sponsored by the Moblin Your Move >>>Developer's challenge >>>Build the coolest Linux based applications with Moblin SDK & >>>win great prizes >>>Grand prize is a trip for two to an Open Source event anywhere >>>in the world >>>http://moblin-contest.org/redirect.php?banner_id=100&url=/ >>>_______________________________________________ >>>E1000-devel mailing list >>>[email protected] >>>https://lists.sourceforge.net/lists/listinfo/e1000-devel >>> > > ------------------------------------------------------------------------------ > SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. > The future of the web can't happen without you. Join us at MIX09 to help > pave the way to the Next Web now. Learn more and register at > http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ > _______________________________________________ > E1000-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/e1000-devel > ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel
