[ale] MTU's and DSL's

[James P. Kinney III]

This has _GOT_ to be a hardware issue with either the DSL "modem" or the
upstream router. The packet show DF is set. It's not a PPPoE
configuration. 

On Wed, 2005-04-20 at 13:55 -0400, Stephan Uphoff wrote:
> On Wed, 2005-04-20 at 12:52, James P. Kinney III wrote:
> > Does NAT impose some MTU changes? I just had to set the MTU on a web
> > server down to 768 to get the traffic passing back out the firewall and
> > up a Speakeasy DSL line.
> 
> 
> My PPPoE software (FreeBSD) allows the following option:
> 
> [tcp]mssfixup
>   Default: Enabled.  This option tells ppp to adjust TCP SYN pack-
>   ets so that the maximum receive segment size is not greater than
>   the amount allowed by the interface MTU.
> 
> Do you have PATH MTU discovery enabled?
> ( Take a look if the packets have DF set)
> 
> 
> Stephan
> 
> 
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-- 
James P. Kinney III          \Changing the mobile computing world/
CEO & Director of Engineering \          one Linux user         /
Local Net Solutions,LLC        \           at a time.          /
770-493-8244                    \.___________________________./
http://www.localnetsolutions.com

GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
<jkinney at localnetsolutions.com>
Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7
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