Fiber Optics PPPoE (DSL, FiOS)

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Subject Author Date
PPPoE (DSL, FiOS) Phil Hobbs 02-15-07
Posted by Phil Hobbs on February 15, 2007, 5:31 pm
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PostPosted: Mon Jan 24, 2005 6:52 pm Post subject: PPPoE and Linksys
router         Reply with quote Back to top
Just as a help for anyone else who may run into this problem: I posted a
question last week about not being able to send email with the Vonage
Linksys router as the first device in a daisy chain. Turns out the
problem was more generic than that.

If you have PPPoE (like DSL or, as in my case, Verizon FIOS fiber to the
home) you MUST change the MTU size from default (which is 1500) to 1492.
The issue is with large packets (like attachments) the mail server
failed to recieve the entire message and therefore failed the checksum
causing the message not to go thru. This is because every packet will be
missing 8 bytes. It may seem intermitent as small messages go thru fine
and of course downloads are restricted by the network so they work fine too.

Just a word to the wise. Wink

Posted by Rick Merrill on February 15, 2007, 7:55 pm
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Phil Hobbs wrote:
> PostPosted: Mon Jan 24, 2005 6:52 pm Post subject: PPPoE and Linksys
> router Reply with quote Back to top
> Just as a help for anyone else who may run into this problem: I posted a
> question last week about not being able to send email with the Vonage
> Linksys router as the first device in a daisy chain. Turns out the
> problem was more generic than that.
>
> If you have PPPoE (like DSL or, as in my case, Verizon FIOS fiber to the
> home) you MUST change the MTU size from default (which is 1500) to 1492.
> The issue is with large packets (like attachments) the mail server
> failed to recieve the entire message and therefore failed the checksum
> causing the message not to go thru. This is because every packet will be
> missing 8 bytes. It may seem intermitent as small messages go thru fine
> and of course downloads are restricted by the network so they work fine
> too.
>
> Just a word to the wise. Wink


Say more - does FiOS require using PPPOE?

How many TVs do you connect at a time? Can they see different channels?

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