topic ACC/X.25 problem : user data delayed in Operating System - HP-UX

ACC/X.25 problem : user data delayed

Stefan Paitoni — Fri, 19 Oct 2001 11:36:51 GMT

We have a K-class with a 2-port X.25 card, with ACC 2.23. We are encountering some problems : we have a client (using sockets) that connects to a server using a DCN (data communication network). Sometimes the client send data to the server and the server acknowledges these data by echoing it (within one second). But sometimes the client receives the echoed data one minute later. We traced the DCN and we noticed that the server echoed the data one second after reception ! I used nettl to trace X.25 packets (by logging subsystem NS_LS_X25) and I saw that echoed data is received one minute after. Where is the problem ???

Re: ACC/X.25 problem : user data delayed

harry d brown jr — Fri, 19 Oct 2001 13:44:35 GMT

The DCN.

Re: ACC/X.25 problem : user data delayed

Stefan Paitoni — Tue, 23 Oct 2001 12:36:26 GMT

are you sure ?
There are delayed data in nettl traces but no delayed data in the DCN traces. Is it possible that HP hardware (X.25 card) is the cause of my problem ? Does nettl gives me the moment when data is available in HP-UX (API,...) or when data arrive in the X.25 card ??