Re: JUMBO FRAMES

Where is that defined ?

(That an NFS controlled retransmission is not a retransmission, that is ?)
-Carlos

Marko Milivojevic @ 08/06/2011 19:38 -0300 dixit:
> You would still be wrong, as retransmission as such would be only
> those performed by the control protocol, i.e. TCP in this case. What
> applications do is application behavior, not network control.
>
> Then again, that's being picky.
>
> --
> Marko Milivojevic - CCIE #18427
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>
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> On Wed, Jun 8, 2011 at 15:17, Carlos G Mendioroz <tron_at_huapi.ba.ar> wrote:
>> Sure,
>> I was just not ok with calling "retransmissions" only those packets
>> recognized as such by tcpdump.
>>
>> I've learned to be picky with the nomenclature of things, my bad.
>> -Carlos
>>
>> Marko Milivojevic @ 08/06/2011 18:09 -0300 dixit:
>>> Those retransmissions are implemented on the application layer and may
>>> not be seen as such unless you were specifically looking for them. On
>>> the other hand, TCP retransmissions will be immediately identified as
>>> such. Have you ever used tcpdump?
>>>
>>> --
>>> Marko Milivojevic - CCIE #18427
>>> Senior Technical Instructor - IPexpert
>>>
>>> FREE CCIE training: http://bit.ly/vLecture
>>>
>>> Mailto: markom_at_ipexpert.com
>>> Telephone: +1.810.326.1444
>>> Web: http://www.ipexpert.com/
>>>
>>> On Wed, Jun 8, 2011 at 13:19, Carlos G Mendioroz <tron_at_huapi.ba.ar> wrote:
>>>> Why is that you won't see retransmissions if it is not TCP ?
>>>> Try SIP over UDP, you will see retransmissions.
>>>> NFS over UDP ? Same thing.
>>>> Just because TCP is not in charge of them does not mean they will not
>>>> take
>>>> place :)
>>>> -Carlos
>>>>
>>>> Marko Milivojevic @ 8/6/2011 15:34 -0300 dixit:
>>>>> Is the application TCP? If it isn't, you won't see the retransmissions.
>>>>>
>>>>> And yeah - traffic is very likely being dropped by the switch, but
>>>>> lacking any command output, it's hard to say for sure :-)
>>>>>
>>>>> --
>>>>> Marko Milivojevic - CCIE #18427
>>>>> Senior Technical Instructor - IPexpert
>>>>>
>>>>> FREE CCIE training: http://bit.ly/vLecture
>>>>>
>>>>> Mailto: markom_at_ipexpert.com
>>>>> Telephone: +1.810.326.1444
>>>>> Web: http://www.ipexpert.com/
>>>>>
>>>>> On Wed, Jun 8, 2011 at 08:32, Bernard Steven <buny.steven_at_gmail.com>
>>>>> wrote:
>>>>>> What will happen if a server sends a jumbo frame to the connected
>>>>>> switch
>>>>>> that does not support (not configured) Jumbo frames ?
>>>>>>
>>>>>> My problem is when i capture traffic from server IF (tcpdump ) , i see
>>>>>> large
>>>>>> frames (1518<) , in the mean time , switch is not configured for JF and
>>>>>> also
>>>>>> i don't see any retransmissions in tcpdump. (assuming switch discards
>>>>>> the
>>>>>> jumbo frame). And also i dont have any visibility on the other end of
>>>>>> the
>>>>>> communication. Some how , application does not work.Switch is a 4948.
>>>>>>
>>>>>>
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>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>> --
>>>> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>>>>
>> --
>> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net