Jumbo frames on PE 1950

Adam Goodman adam at wispring.com
Fri Sep 19 18:34:22 CDT 2008


Not all my devices will do more than 1500 and I think the STD protocol  
is 1500 mtu. Iknow cisco will do larger frames (4096?)

Sent from my iPhone

On Sep 19, 2008, at 7:30 PM, Peter J Milanese <PMilanese at nypl.org>  
wrote:

> Ethernet does 9000.
>
> Your network must be configured to do so. It is not just enabling it  
> on the box.
>
>
>
>
> ----- Original Message -----
> From: Adam Goodman [adam at wispring.com]
> Sent: 09/19/2008 07:27 PM AST
> To: "Brian D. McGrew" <brian at visionpro.com>
> Cc: "<linux-poweredge at dell.com>"
> Subject: Re: Jumbo frames on PE 1950
>
>
>
> I think Ethernet is up to 1500 mtu.
>
> Sent from my iPhone
>
> On Sep 19, 2008, at 7:19 PM, "Brian D. McGrew" <brian at visionpro.com>
> wrote:
>
>> I'm having the same kind of a problem on a 1900 with VMware ESXi,  
>> but,
>> since it's ESXi, I don't have much debug to go on.  I set the MTU to
>> 9000 at the switch and the computer and lost all network  
>> connectivity!
>>
>> Could be related?
>>
>> -brian
>>
>> -----Original Message-----
>> From: linux-poweredge-bounces at dell.com
>> [mailto:linux-poweredge-bounces at dell.com] On Behalf Of Matt Lawrence
>> Sent: Friday, September 19, 2008 3:37 PM
>> To: linux-poweredge at dell.com
>> Subject: Jumbo frames on PE 1950
>>
>> I'm running CentOS 5.2 with a much more recent kernel on a bunch of  
>> PE
>> 1950 systems.  I have set the maximum MTU on the switch to 9000 and
>> I'm
>> trying to make jumbo frames work.  No luck so far, with any MTU
>> greater
>> than 1500,  netperf just gets the error: netperf: receive_response:  
>> no
>> response received. errno 110 counter 0
>>
>> Any idea what I have missed?
>>
>> -- Matt
>>
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