Re: Why packets (from my ISP to me) on the WAN VC side of my router are twice the size of packets on the Ethernet (and a corresponding twice as many bytes)
rhkramer@gmail.com wrote:
> On Thursday, February 09, 2017 07:21:58 AM Dan Purgert wrote:
>> rhkramer@gmail.com wrote:
>> > I noticed today that those statistics pages do tell me the size of the
>> > MTUs
>> >
>> > On the: MTU is:
>> > WAN VC 1540
>> > Ethernet 1500
>>
>> Yuck. Hate it when people start mucking around with MTUs ...
>
> If somebody was mucking about with MTUs it tweren't me. I'm guessing
> those are set in the modem [...]
Yes, Earthlink is mucking aound with MTUs. As (I think) has been
previously mentioned, Ethernet is 1500 bytes.
TYPICALLY one would see that a MTU is *lowered* on a pppoe connection,
rahter than *raised*. Suppose at the end of the day, if the guys
handling it know what they're doing, it doesn't much matter one way or
the other -- but it can cause loads of "fun" problems, especially when
the guys who know what they're doing end up training their third-world
contractor replacements.
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