Hello Experts,
When we are sending or receiving larger data packets, running TCP/IP connections break down. And the data is about (2000 bytes up to 5000 bytes)
"connection to partner broken" at the sapgui
"Connection timed out" in the R/3-System
Kindly share the reason why we are getting this above scenario.
Thanks in advance.
You are having this issue because applications send data-packets larger than the MTU-size of the underlying network these data-packets must be fragmented into serveral packets less than or equal MTU-size.
These kind of problems belong to your specific TCP/IP configruation and are normally no SAP-Problems.
In FDDI networks the normal MTU-Size is 4352 bytes. That can be verified using the command: netstat -i
The normal ethernet packet size is about 1500 Bytes. So Routers between FDDI and Ethernet must fragment and defragment packets larger than 1500 Bytes. WAN-Lines may have other (smaller) MTU-Sizes.
To check wether or not you have that problem you may use the niping program. (SAP Program)
1. Start the niping server on the R/3-computer. (login as R/3-adm user)
command: niping -s -I0 &
2. Start the niping client on the frontend (PC)
command: niping -c -B 5000 -H
You may vary the blocksize from 1000 Bytes up to 5000 Bytes. Please envolve your networking guys to solve that ploblem.
It may be necessary to use network-analysers to check which component isn't able to do the fragmentation/defragmentation (IP-layer).
May be the PC's TCP/IP-Stack isn't able to reassemble fragmented TCP/IP packets.