[opensuse] Suse Support for Jumbo Frames

Dave Feustel

23 Apr 2009 23 Apr '09

15:48

I'm running Suse 11 on an MSI K9N NEO Version 3. According to the motherboard manual, the lan nic is a Realtek RTL8111B which, according to its datasheet, supports Jumbo frames to 7422. I have not succeeded in setting the mtu to 7422 using either ifconfig or the ip command. It's hard to believe that Suse 11 doesn't support Jumbo frames. How are Jumbo Frames enabled in Suse? Thanks. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

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Per Jessen

23 Apr 23 Apr

16:09

Dave Feustel wrote:

...

I'm running Suse 11 on an MSI K9N NEO Version 3. According to the motherboard manual, the lan nic is a Realtek RTL8111B which, according to its datasheet, supports Jumbo frames to 7422. I have not succeeded in setting the mtu to 7422 using either ifconfig or the ip command. It's hard to believe that Suse 11 doesn't support Jumbo frames.

How are Jumbo Frames enabled in Suse?

Dave, it's not about openSUSE or not - if anything, it's about the kernel and the driver. Jumbo-sized frames are enabled in openSUSE using ifconfig exactly as they are in any other Linux-system. As for your frame size of 7422, read my previous reply or the driver source code. It will _not_ support more than 7200. /Per -- Per Jessen, Zürich (13.6°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

PGNet Dev

16:35

On Thu, Apr 23, 2009 at 9:09 AM, Per Jessen wrote:

...

As for your frame size of 7422, read my previous reply or the driver source code. It will _not_ support more than 7200.

would that limit also hold true for Xen DomU<->DomU &/or Xen Dom0<->DomU comms? i'm _able_ to set mtu=9000 on any/all DomU vifs & Dom0 bridge linked to a real/physical intfc (have not youet verified function/performance); UNable to set mtu to anything OTHER than 1500 for a virtual bridge in Dom0 ... thanks. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Per Jessen

17:08

PGNet Dev wrote:

...

On Thu, Apr 23, 2009 at 9:09 AM, Per Jessen wrote:

...
As for your frame size of 7422, read my previous reply or the driver source code. It will _not_ support more than 7200.

would that limit also hold true for Xen DomU<->DomU &/or Xen Dom0<->DomU comms?

If the r8169 driver were somehow involved in that setup, yes. /Per -- Per Jessen, Zürich (11.9°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

Dave Feustel

16:15

On Thu, Apr 23, 2009 at 05:48:26PM +0200, Dave Feustel wrote:

...

I'm running Suse 11 on an MSI K9N NEO Version 3. According to the motherboard manual, the lan nic is a Realtek RTL8111B which, according to its datasheet, supports Jumbo frames to 7422. I have not succeeded in setting the mtu to 7422 using either ifconfig or the ip command. It's hard to believe that Suse 11 doesn't support Jumbo frames.

How are Jumbo Frames enabled in Suse?

ip link set eth0 mtu 7200 #max permitted value currently

...

Thanks. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

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Dave Feustel
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