Re: [9fans] tcp!

[Gorka Guardiola <paurea@gmail.com>]

I had this problem several years ago
with an adsl router (9fans archive may know about this). There was a bug in my adsl router (which seems to be common, I have seen it since more than once) that dropped ethernet frames of size greater than 1480 (someone counted a header twice probably). Linux adapts the
mss to 1480 if there are problems so it works in this case. 

G.

On Aug 21, 2012, at 8:32 PM, Richard Miller <9fans@hamnavoe.com> wrote:

> I reported:
> 
>> Within the last month or so I've been having trouble copying large
>> files to remote servers e.g. sources.  The cp process hangs for
>> many minutes and eventually ends in 'mount rpc error'.
> 
> Thanks to a hint from Erik ("... an mss problem of some sort"), I've
> managed to make the problem go away, by doing
>  echo mtu 1496 >/net/ipifc/1/ctl
> 
> I hope to come back to this when I have more time, because I don't
> like not understanding why this works.  As nobody else has said they
> have the same trouble, there may be something amiss in my adsl gateway.
> 
>