[ale] Higher MTU for 40 GB NICs?

dev null zero two dev.null.02 at gmail.com
Tue Jun 7 15:29:43 EDT 2016


10 Gb*

On Tue, Jun 7, 2016 at 3:29 PM, dev null zero two <dev.null.02 at gmail.com>
wrote:

> absolutely increase it, it lowers the overhead of TCP. 9000 should be the
> default MTU for 10 GB links at a minimum. be wary of packet fragmentation
> if they end up somewhere that isn't configured to use that MTU though.
>
> On Tue, Jun 7, 2016 at 3:22 PM, Lightner, Jeffrey <
> JLightner at dsservices.com> wrote:
>
>> Is there any intrinsic benefit to using a higher MTU for 40 GB NICs?
>>
>>
>>
>> That is, with all other things being equal is there any benefit to
>> setting it higher on a 40 GB than on a 10 GB or 1 GB?
>>
>>
>>
>> I notice 40 GB defaulted to 1500 just like the 1 GB and 10 GB.
>>
>>
>>
>> The only time I’ve mucked with MTU in recent memory was because a vendor
>> insisted it would solve a problem.   (It didn’t because the issue wasn’t
>> networking in the first place but that is another story.)
>>
>>
>>
>>
>>
>>
>>
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