Conference lassie::ucx

5216.0. "SHOW PROT UDP/Socket buffer drops" by RULLE::KLASSON (Sven-Olof Klasson @GOO) Wed Feb 12 1997 14:29

Hi,

A customer has a application process to communicates with 50-100 PLC's. A PLC
is a small computer used for controlling robots and machines in a manufactory
plant.
UDP is used for communication. Sometimes they loose communication with PLC's 
for a while. When this happens UCX SHOW PROT UDP/SOCKET BUFFER DROPS 
increments. The customer has tried to increase the quota
  UCX> set prot udp/quota=(receive=18000,send=18000)
But they are still having problems, and SOCKET BUFFER DROPS increments.

They have seen with UCX SHOW DEV BGx /FULL that RECEIVE/Socket buffer bytes
grows to very close the quota value when they have problems.

What does this mean?
Is there a problem with the application process were it does not read data wich
it has received?
Or, could this be a problem with UCX?.

I would appreciate comments on this.
UCX V4.0-1 on VMS/Alpha V6.2-1H2

Thanks,
Sven-Olof Klasson, CSC Sweden