Re: JUMBO FRAMES

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
>
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> 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
Blogs and organic groups at http://www.ccie.net