[nsp] Help: Packet TCP checksum errors (IP checksum is OK)

[Hank Nussbacher]

At 10:30 AM 12-02-04 +0100, Oliver Boehmer (oboehmer) wrote:
> >
> > My scenario is:
> > [Host-1]--L1--[Cat6500]------L2-----[Cat4500]--L3--[Host-2]
> >
> > Host 1 & 2 are unix gears.
> > L1 & L3 are 100Mb Ethernet
> > L2 is 100Mb ethernet encapsulated by a HUNT to ATM over SDH (STM1) and
> > vice versa.
> >
> > Reported problem: FTP file transfers fails from Host-1 to Host-2.
> >
> >[...]
> >
> >
> > L2 is a leased line, the provider says he don't see any problem with
> > the link, the "hunt" is not under my management.
> >
> > Any ideas what to investigate ? how to fix ? Workarounds ?
>
>Can you investigate whether the ATM link has payload scrambling enabled?
>It should have. See
>http://www.cisco.com/warp/public/121/atm_scrambling.html

We enable scramble on all our SDH lines as well (in interface mode - just 
type 'scramble').

-Hank


>         oli
>
>_______________________________________________
>cisco-nsp mailing list  cisco-nsp at puck.nether.net
>https://puck.nether.net/mailman/listinfo/cisco-nsp
>archive at http://puck.nether.net/pipermail/cisco-nsp/