Well, i am not too sure if GRE Tunnelling is up on the remote side but I can confirm that there is no IPSEC VPN. Well, the connection is actually from diff geographical area where it passed through the ATM 55M connection before printing to the printer.

Well, trace route as below:

Tracing route to 16.21.11.18 over a maximum of 30 hops

1 16 ms 6 ms 7 ms 16.11.4.250

2 <1 ms <1 ms <1 ms 16.11.10.253

3 2 ms 1 ms 1 ms 16.11.254.48

4 3 ms 3 ms 1 ms 16.11.19.1

5 5 ms 4 ms 1 ms 16.21.11.18

Trace complete.

The smallest it can go is 1472.

Thanks Rick..

Cindy,

Anytime you are unable to send 1500 byte datagrams over the network the application mayn't work correctly. In your case the problem could be anywhere in the path as indicated by your traceroute.

If the printing application uses TCP then you may want to try configuring this command 'ip tcp adjust-mss 1450' on the LAN interface facing either the client or printer itself. If this resolves your application problem then you can either leave it this way or pursue troubleshooting further to isolate the part of the network that's preventing 1500 byte packets from getting across.

HTH

Sundar

Thanks Sundar for your reply.

First of all, what is the command means? referring to ip tcp adjust-mss 1450 and how it will help? I got to cisco site but still can't figure out what that means..:) Cause need to explain to management if this to be implemented on the router lan end.

For your info, I have done a -l 1500 to all of the hops from the remote PC ,is just that the end-to-end not able to go through..which is the remote PC and the printer..

Thanks.

Hi Sundar,

If I ping from pc using -l 1500 to the printer, will it work in this case?

Thanks.

Rick,

Can I say that when i ping, i will still get request timed out with buffer size 1500?

thanks..

Cindy

It depends on whether the ping is sent with the DF bit set in the IP header.

HTH

Rick

Rick,

I ping with "Set don;t fragment" and it says that i need to fragment it. Anyway, have put in sniffers to see what are the result is as the customers didn;t complain already. They can print bash job..so,suspecting could be the host too..

Have rated you guys post..

Thanks a lot! will update if have anything.

Cindy

Please do update when you learn anything else. This is an interesting problem.

Thanks for the rating.

HTH

Rick