Hello Erick,

If that's the case, than wouldn't I have problem pinging any nodes (with
over 1500 byte datagram) across the ATM link?
But I do not have pinging any other nodes. It only happens, when I am
sitting on my router pinging the other router's interface and vice-versa...

Sean



Erick B. wrote:
> 
> The ATM connection (provider) is probably limiting
> payload size to 1500. They may doing some form of
> traffic policing - common these days. Ethernet LAN MTU
> is 1500 so there really isn't a need to send greater
> than that across ATM in this case. 
> 
> --- Sean Kim  wrote:
> > Hello,
> > 
> > My company has this 3rd party connection through
> > ATM.  The ATM TA has an
> > ethernet outlet which is and connected to our core
> > router. Our parner
> > company is connected with anATM module on their
> > router.
> > 
> > Recently, I was told by our partner company that
> > they were running ping test
> > and they could not ping my ethernet interface (on
> > the core router) with
> > datagram over 1500 byte.
> > 
> > From both the router itself and my workstation, I
> > pinged my own interface
> > with 1600 byte, and I was able to ping it.  But when
> > I pinged my partner
> > company's interface with 1600 byte, it failed.
> > 
> > In general it seems that pinging from other nodes,
> > there is no problem, but
> > sitting on the routers itself, pinging the other
> > routers interface with the
> > datagram size of over 1500 is failing.
> > 
> > There isn't any problem with connection of
> > performance.  But I am very
> > curious about why this is happening.
> > Does anybody have any idea why this would happen? 
> > Or can anybody give me a
> > clue as to how to approach this problem?
> > 
> > Thank you in advance.
> > 
> > Sean Kim
> [EMAIL PROTECTED]
> 
> 
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