Re: PPPoE

I don't know, ask Cisco ;-)

Joking aside - there are protocols that cannot be fragmented (HTTPS)
and for those a little white lie on the downstream interface goes a
long way...

--
Marko Milivojevic - CCIE #18427 (SP R&S)
Senior CCIE Instructor - IPexpert
On Tue, May 29, 2012 at 9:22 AM, Carlos G Mendioroz <tron_at_huapi.ba.ar> wrote:
> Why would packets not get fragmented ?
> -Carlos
>
> Marko Milivojevic @ 29/05/2012 11:54 -0300 dixit:
>
>> Larger packets will be dropped. On the downstream interfaces you can use
>> "ip tcp adjust-mss" to remedy the problem for TCP.
>>
>> --
>> Marko Milivojevic - CCIE #18427
>>
>> :: This message was sent from a mobile device. I apologize for errors and
>> brevity. ::
>>
>> On May 28, 2012, at 18:17, Janesha Abeydeera<janesha_abey_at_yahoo.com.au>
>> B wrote:
>>
>>> Hi Marc,
>>>
>>> by setting the mtu to 1492 ,what happens to larger packets? do they
>>> get dropped?
>>>
>>>
>>> as an alternative, could we B set the df bit via route-map and
>>> apply it to the interface?
>>>
>>>
>>> Thanks,
>>> Janesh
>>>
>>>
>>> ________________________________
>>> From: marc abel<marcabel_at_gmail.com>
>>> To: Vincent Tay<vtay.75_at_gmail.com>
>>> Cc:
>>> Carlos G Mendioroz<tron_at_huapi.ba.ar>; Adam Booth<adam.booth_at_gmail.com>;
>>> "Ccielab_at_groupstudy.com"<ccielab_at_groupstudy.com>
>>> Sent: Tuesday, 29 May 2012
>>> 6:21 AM
>>> Subject: Re: PPPoE
>>>
>>> Interleaving is a function of fragmenting. As we
>>> know we must set the MTU
>>> to 1492 on PPPoE links to avoid fragmentation. Maybe
>>> this is what they
>>> mean, set the MTU so you don't have fragmentation?
>>>
>>> On Mon,
>>> May 28, 2012 at 8:12 AM, Vincent Tay<vtay.75_at_gmail.com> B wrote:
>>>
>>>> Hi,
>>>>
>>>> I
>>>
>>> come across this question while working on a workbook. It does not have
>>>>
>>>> any
>>>
>>> solution information so i was curious. Then, i search the web and in
>>>>
>>>> fact
>>>
>>> see some issue with PPPoE and interleaving in some ISP forum.Being
>>>>
>>>>
>>> practical, i want to know more so that i could use it some day.
>>>>
>>>>
>>>> Regards
>>>>
>>> Vincent Tay
>>>>
>>>>
>>>> On Mon, May 28, 2012 at 7:12 PM, Carlos G Mendioroz
>>>
>>> <tron_at_huapi.ba.ar
>>>>>
>>>>> wrote:
>>>>
>>>>
>>>>> Would you share why do you want to do that ?
>>>>>
>>>>> Vincent Tay @ 27/05/2012 23:38 -0300 dixit:
>>>>>
>>>>> hi all, thanks.
>>>
>>> how do i configure to prevent interleaving?
>>>>>>
>>>>>>
>>>>>> Regards
>>>>>> Vincent Tay
>>>>>>
>>>>>> On 27 May, 2555 BE, at 10:59 PM, Carlos G
>>>
>>> Mendioroz<tron_at_huapi.ba.ar>
>>>>>>
>>>>>> wrote:
>>>>>>
>>>>>> Adding to what Adam said,
>>>
>>> interleaving also may happen at ADSL,
>>>>>>>
>>>>>>> underneath of pppoe, to distribute
>>>
>>> the data over time get better
>>>>
>>>> protection
>>>>>>>
>>>>>>> of data loss from spike
>>>
>>> noise.
>>>>>>>
>>>>>>>
>>>>>>> I mention this because of your will to get rid of
>>>
>>> interleaving.
>>>>>>>
>>>>>>> Interleaving in LFI has no really bad side to it.
>>>
>>> Interleaving in ADSL
>>>>>>>
>>>>>>> brings latency up.
>>>>>>>
>>>>>>> -Carlos
>>>>>>>
>>>>>>>
>>> Adam Booth @ 27/05/2012 10:11 -0300 dixit:
>>>>>>>
>>>>>>>
>>>>>>>> Hi Vincent,
>>>>>>>>
>>>>
>>>>>>> Interleaving is a function associated with ML-PPP (typically you find
>>>>
>>>>
>>>>>>> reference to it as LFI). You could do ML-PPPoE if you really wanted
>>>>
>>>> to,
>>>>>>>>
>>>>>>>> I
>>>>>>>> guess as a way to increase bandwidth or provide access
>>>
>>> resiliency.
>>>>>>>>
>>>>>>>>
>>>>>>>> Cheers,
>>>>>>>> Adam
>>>>>>>>
>>>>>>>> On Sun, May 27,
>>>
>>> 2012 at 10:49 PM, Vincent Tay<vtay.75_at_gmail.com>
>>>>>>>>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>
>>> Hi all,
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> How do i ensure that there are no interleaving for
>>>
>>> PPPoE? What does
>>>>
>>>> it
>>>>>>>>>
>>>>>>>>> means and how do i configure it?I have search
>>>
>>> the entire documents in
>>>>>>>>>
>>>>>>>>> vain.
>>>>>>>>>
>>>>>>>>> Regards
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Blogs and organic groups at http://www.ccie.net
>>>>>>>>>
>>>>>>>>>
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>>>>>>>>
>>>>>>>>
>>>>
>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> --
>>>>>>> Carlos G Mendioroz<tron_at_huapi.ba.ar>
>>>
>>> LW7 EQI B Argentina
>>>>>>>
>>>>>>>
>>>>>>
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>>>>>
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>>>>> --
>>>>> Carlos G Mendioroz<tron_at_huapi.ba.ar> B  LW7 EQI B Argentina
>>>>
>>>>
>>>>
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>>> --
>>> Marc Abel
>>> CCIE #35470
>>> (Routing and Switching)
>>>
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> Carlos G Mendioroz B <tron_at_huapi.ba.ar> B LW7 EQI B Argentina
Blogs and organic groups at http://www.ccie.net